TreeView Class

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Source:

TreeView.cs

Displays a hierarchical collection of labeled items, each represented by a TreeNode.

public ref class TreeView : System::Windows::Forms::Control

[System.Windows.Forms.Docking(System.Windows.Forms.DockingBehavior.Ask)]
public class TreeView : System.Windows.Forms.Control

[<System.Windows.Forms.Docking(System.Windows.Forms.DockingBehavior.Ask)>]
type TreeView = class
    inherit Control

Public Class TreeView
Inherits Control

Inheritance

Object

MarshalByRefObject

Component

Control

TreeView

Derived

System.ComponentModel.Design.ObjectSelectorEditor.Selector

Attributes

DockingAttribute

Examples

The following code example demonstrates the use of the TreeView control.

// Populates a TreeView control with example nodes. 
private void InitializeTreeView()
{
    treeView1.BeginUpdate();
    treeView1.Nodes.Add("Parent");
    treeView1.Nodes[0].Nodes.Add("Child 1");
    treeView1.Nodes[0].Nodes.Add("Child 2");
    treeView1.Nodes[0].Nodes[1].Nodes.Add("Grandchild");
    treeView1.Nodes[0].Nodes[1].Nodes[0].Nodes.Add("Great Grandchild");
    treeView1.EndUpdate();
}

' Populates a TreeView control with example nodes. 
Private Sub InitializeTreeView()
    treeView1.BeginUpdate()
    treeView1.Nodes.Add("Parent")
    treeView1.Nodes(0).Nodes.Add("Child 1")
    treeView1.Nodes(0).Nodes.Add("Child 2")
    treeView1.Nodes(0).Nodes(1).Nodes.Add("Grandchild")
    treeView1.Nodes(0).Nodes(1).Nodes(0).Nodes.Add("Great Grandchild")
    treeView1.EndUpdate()
End Sub

The following, more complex code example displays customer information in a TreeView control. The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. In this example, 1,000 customers are displayed with 15 orders each. The repainting of the TreeView is suppressed by using the BeginUpdate and EndUpdate methods, and a wait Cursor is displayed while the TreeView creates and paints the TreeNode objects. This example requires that you have a Customer object that can hold a collection of Order objects. It also requires that you have a cursor file that is named MyWait.cur in the application directory and that you have created an instance of a TreeView control on a Form.

// The basic Customer class.
ref class Customer: public System::Object
{
private:
   String^ custName;

protected:
   ArrayList^ custOrders;

public:
   Customer( String^ customername )
   {
      custName = "";
      custOrders = gcnew ArrayList;
      this->custName = customername;
   }


   property String^ CustomerName 
   {
      String^ get()
      {
         return this->custName;
      }

      void set( String^ value )
      {
         this->custName = value;
      }

   }

   property ArrayList^ CustomerOrders 
   {
      ArrayList^ get()
      {
         return this->custOrders;
      }

   }

};


// End Customer class
// The basic customer Order class.
ref class Order: public System::Object
{
private:
   String^ ordID;

public:
   Order( String^ orderid )
   {
      ordID = "";
      this->ordID = orderid;
   }


   property String^ OrderID 
   {
      String^ get()
      {
         return this->ordID;
      }

      void set( String^ value )
      {
         this->ordID = value;
      }

   }

};
// End Order class



void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for ( int x = 0; x < 1000; x++ )
   {
      customerArray->Add( gcnew Customer( "Customer " + x ) );
   }
   
   // Add orders to each Customer object in the ArrayList.
   IEnumerator^ myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer1 = safe_cast<Customer^>(myEnum->Current);
      for ( int y = 0; y < 15; y++ )
      {
         customer1->CustomerOrders->Add( gcnew Order( "Order " + y ) );
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   ::Cursor::Current = gcnew System::Windows::Forms::Cursor( "MyWait.cur" );
   
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1->BeginUpdate();
   
   // Clear the TreeView each time the method is called.
   treeView1->Nodes->Clear();
   
   // Add a root TreeNode for each Customer object in the ArrayList.
   myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer2 = safe_cast<Customer^>(myEnum->Current);
      treeView1->Nodes->Add( gcnew TreeNode( customer2->CustomerName ) );
      
      // Add a child treenode for each Order object in the current Customer object.
      IEnumerator^ myEnum = customer2->CustomerOrders->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Order^ order1 = safe_cast<Order^>(myEnum->Current);
         treeView1->Nodes[ customerArray->IndexOf( customer2 ) ]->Nodes->Add( gcnew TreeNode( customer2->CustomerName + "." + order1->OrderID ) );
      }
   }
   
   // Reset the cursor to the default for all controls.
   ::Cursor::Current = Cursors::Default;
   
   // Begin repainting the TreeView.
   treeView1->EndUpdate();
}

// The basic Customer class.
public class Customer : System.Object
{
   private string custName = "";
   protected ArrayList custOrders = new ArrayList();

   public Customer(string customername)
   {
      this.custName = customername;
   }

   public string CustomerName
   {      
      get{return this.custName;}
      set{this.custName = value;}
   }

   public ArrayList CustomerOrders 
   {
      get{return this.custOrders;}
   }
} // End Customer class 

// The basic customer Order class.
public class Order : System.Object
{
   private string ordID = "";

   public Order(string orderid)
   {
      this.ordID = orderid;
   }

   public string OrderID
   {      
      get{return this.ordID;}
      set{this.ordID = value;}
   }
} // End Order class

// Create a new ArrayList to hold the Customer objects.
private ArrayList customerArray = new ArrayList(); 

private void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for(int x=0; x<1000; x++)
   {
      customerArray.Add(new Customer("Customer" + x.ToString()));
   }

   // Add orders to each Customer object in the ArrayList.
   foreach(Customer customer1 in customerArray)
   {
      for(int y=0; y<15; y++)
      {
         customer1.CustomerOrders.Add(new Order("Order" + y.ToString()));    
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = new Cursor("MyWait.cur");
        
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate();

   // Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear();

   // Add a root TreeNode for each Customer object in the ArrayList.
   foreach(Customer customer2 in customerArray)
   {
      treeView1.Nodes.Add(new TreeNode(customer2.CustomerName));
          
      // Add a child treenode for each Order object in the current Customer object.
      foreach(Order order1 in customer2.CustomerOrders)
      {
         treeView1.Nodes[customerArray.IndexOf(customer2)].Nodes.Add(
           new TreeNode(customer2.CustomerName + "." + order1.OrderID));
      }
   }

   // Reset the cursor to the default for all controls.
   Cursor.Current = Cursors.Default;

   // Begin repainting the TreeView.
   treeView1.EndUpdate();
}

Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

Remarks

The Nodes collection holds all the TreeNode objects that are assigned to the TreeView control. The tree nodes in this collection are referred to as the root tree nodes. Any tree node that is subsequently added to a root tree node is referred to as a child node. Because each TreeNode can contain a collection of other TreeNode objects, you might find it difficult to determine your location in the tree structure when you iterate through the collection. You can parse the TreeNode.FullPath string by using the PathSeparator string value to determine where a TreeNode label begins and ends.

You can display images next to the tree nodes by assigning an ImageList to the ImageList property and referencing the index value of an Image in the ImageList to assign that Image. Use the following properties to assign images:

• Set the ImageIndex property to the index value of the Image that you want to display when a tree node is not selected.

• Set the SelectedImageIndex property to the index value of the Image that you want to display when a tree node is selected.

The images referenced by the ImageIndex and SelectedImageIndex property values are the default images displayed by all the tree nodes that are assigned to the Nodes collection. Individual tree nodes can override the default images by setting the TreeNode.ImageIndex and TreeNode.SelectedImageIndex properties.

The state images displayed in the TreeView are 16 x 16 pixels by default. Setting the ImageSize property of the StateImageList will have no effect on how the images are displayed. However, the state images are resized according to the system DPI setting when the app.config file contains the following entry:

<appSettings>
  <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />
</appSettings>

Tree nodes can be expanded to display the next level of child tree nodes. The user can expand the TreeNode by clicking the plus-sign (+) button, if one is displayed next to the TreeNode, or you can expand the TreeNode by calling the TreeNode.Expand method. To expand all the child tree node levels in the Nodes collection, call the ExpandAll method. You can collapse the child TreeNode level by calling the TreeNode.Collapse method, or the user can press the minus-sign (-) button, if one is displayed next to the TreeNode. You can also call the TreeNode.Toggle method to alternate between the expanded and collapsed states.

Tree nodes can optionally display check boxes. To display the check boxes, set the CheckBoxes property of the TreeView to true. The Checked property is set to true for tree nodes that are in a checked state.

Note

Setting the TreeNode.Checked property from within the BeforeCheck or AfterCheck event causes the event to be raised multiple times and can result in unexpected behavior. For example, you might set the Checked property in the event handler when you are recursively updating the child nodes so that the user does not have to expand and check each one individually. To prevent the event from being raised multiple times, add logic to your event handler that only executes your recursive code if the Action property of the TreeViewEventArgs is not set to TreeViewAction.Unknown. For an example of how to do this, see the Example section of the AfterCheck or BeforeCheck events.

You can change the appearance of the TreeView control by setting some of its display and style properties. Setting ShowPlusMinus to true displays a plus-sign or minus-sign button next to each TreeNode that can be expanded or collapsed, respectively. Setting the ShowRootLines property to true causes the TreeView to display lines that join all the root tree nodes together. You can display lines that connect child tree nodes to their root node by setting the ShowLines property to true. Setting the HotTracking property to true changes the appearance of the tree node labels as the mouse pointer passes over them. When hot-tracked, the tree node labels take on the appearance of a hyperlink. You can also completely customize the appearance of the TreeView control. To do this, set the DrawMode property to a value other than TreeViewDrawMode.Normal and handle the DrawNode event.

Note

When setting the CheckBoxes, Scrollable, ImageIndex, and SelectedImageIndex properties at run time, the TreeView handle is recreated (see Control.RecreateHandle) to update the control's appearance. This causes all tree nodes to be collapsed, except for the selected TreeNode.

Constructors

TreeView()

Initializes a new instance of the TreeView class.

Properties

AccessibilityObject	Gets the AccessibleObject assigned to the control. (Inherited from Control)
AccessibleDefaultActionDescription	Gets or sets the default action description of the control for use by accessibility client applications. (Inherited from Control)
AccessibleDescription	Gets or sets the description of the control used by accessibility client applications. (Inherited from Control)
AccessibleName	Gets or sets the name of the control used by accessibility client applications. (Inherited from Control)
AccessibleRole	Gets or sets the accessible role of the control. (Inherited from Control)
AllowDrop	Gets or sets a value indicating whether the control can accept data that the user drags onto it. (Inherited from Control)
Anchor	Gets or sets the edges of the container to which a control is bound and determines how a control is resized with its parent. (Inherited from Control)
AutoScrollOffset	Gets or sets where this control is scrolled to in ScrollControlIntoView(Control). (Inherited from Control)
AutoSize	This property is not relevant for this class. (Inherited from Control)
BackColor	Gets or sets the background color for the control.
BackgroundImage	Gets or set the background image for the TreeView control.
BackgroundImageLayout	Gets or sets the layout of the background image for the TreeView control.
BindingContext	Gets or sets the BindingContext for the control. (Inherited from Control)
BorderStyle	Gets or sets the border style of the tree view control.
Bottom	Gets the distance, in pixels, between the bottom edge of the control and the top edge of its container's client area. (Inherited from Control)
Bounds	Gets or sets the size and location of the control including its nonclient elements, in pixels, relative to the parent control. (Inherited from Control)
CanEnableIme	Gets a value indicating whether the ImeMode property can be set to an active value, to enable IME support. (Inherited from Control)
CanFocus	Gets a value indicating whether the control can receive focus. (Inherited from Control)
CanRaiseEvents	Determines if events can be raised on the control. (Inherited from Control)
CanSelect	Gets a value indicating whether the control can be selected. (Inherited from Control)
Capture	Gets or sets a value indicating whether the control has captured the mouse. (Inherited from Control)
CausesValidation	Gets or sets a value indicating whether the control causes validation to be performed on any controls that require validation when it receives focus. (Inherited from Control)
CheckBoxes	Gets or sets a value indicating whether check boxes are displayed next to the tree nodes in the tree view control.
ClientRectangle	Gets the rectangle that represents the client area of the control. (Inherited from Control)
ClientSize	Gets or sets the height and width of the client area of the control. (Inherited from Control)
CompanyName	Gets the name of the company or creator of the application containing the control. (Inherited from Control)
Container	Gets the IContainer that contains the Component. (Inherited from Component)
ContainsFocus	Gets a value indicating whether the control, or one of its child controls, currently has the input focus. (Inherited from Control)
ContextMenu	Gets or sets the shortcut menu associated with the control. (Inherited from Control)
ContextMenuStrip	Gets or sets the ContextMenuStrip associated with this control. (Inherited from Control)
Controls	Gets the collection of controls contained within the control. (Inherited from Control)
Created	Gets a value indicating whether the control has been created. (Inherited from Control)
CreateParams	Gets the required creation parameters when the control handle is created.
Cursor	Gets or sets the cursor that is displayed when the mouse pointer is over the control. (Inherited from Control)
DataBindings	Gets the data bindings for the control. (Inherited from Control)
DataContext	Gets or sets the data context for the purpose of data binding. This is an ambient property. (Inherited from Control)
DefaultCursor	Gets or sets the default cursor for the control. (Inherited from Control)
DefaultImeMode	Gets the default Input Method Editor (IME) mode supported by the control. (Inherited from Control)
DefaultMargin	Gets the space, in pixels, that is specified by default between controls. (Inherited from Control)
DefaultMaximumSize	Gets the length and height, in pixels, that is specified as the default maximum size of a control. (Inherited from Control)
DefaultMinimumSize	Gets the length and height, in pixels, that is specified as the default minimum size of a control. (Inherited from Control)
DefaultPadding	Gets the default internal spacing, in pixels, of the contents of a control. (Inherited from Control)
DefaultSize	Gets the default size of the control.
DesignMode	Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component)
DeviceDpi	Gets the DPI value for the display device where the control is currently being displayed. (Inherited from Control)
DisplayRectangle	Gets the rectangle that represents the display area of the control. (Inherited from Control)
Disposing	Gets a value indicating whether the base Control class is in the process of disposing. (Inherited from Control)
Dock	Gets or sets which control borders are docked to its parent control and determines how a control is resized with its parent. (Inherited from Control)
DoubleBuffered	Gets or sets a value indicating whether the control should redraw its surface using a secondary buffer. The DoubleBuffered property does not affect the TreeView control.
DrawMode	Gets or sets the mode in which the control is drawn.
Enabled	Gets or sets a value indicating whether the control can respond to user interaction. (Inherited from Control)
Events	Gets the list of event handlers that are attached to this Component. (Inherited from Component)
Focused	Gets a value indicating whether the control has input focus. (Inherited from Control)
Font	Gets or sets the font of the text displayed by the control. (Inherited from Control)
FontHeight	Gets or sets the height of the font of the control. (Inherited from Control)
ForeColor	Gets or sets the foreground color of the control.
FullRowSelect	Gets or sets a value indicating whether the selection highlight spans the width of the tree view control.
Handle	Gets the window handle that the control is bound to. (Inherited from Control)
HasChildren	Gets a value indicating whether the control contains one or more child controls. (Inherited from Control)
Height	Gets or sets the height of the control. (Inherited from Control)
HideSelection	Gets or sets a value indicating whether the selected tree node remains highlighted even when the tree view has lost the focus.
HotTracking	Gets or sets a value indicating whether a tree node label takes on the appearance of a hyperlink as the mouse pointer passes over it.
ImageIndex	Gets or sets the image-list index value of the default image that is displayed by the tree nodes.
ImageKey	Gets or sets the key of the default image for each node in the TreeView control when it is in an unselected state.
ImageList	Gets or sets the ImageList that contains the Image objects that are used by the tree nodes.
ImeMode	Gets or sets the Input Method Editor (IME) mode of the control. (Inherited from Control)
ImeModeBase	Gets or sets the IME mode of a control. (Inherited from Control)
Indent	Gets or sets the distance to indent each child tree node level.
InvokeRequired	Gets a value indicating whether the caller must call an invoke method when making method calls to the control because the caller is on a different thread than the one the control was created on. (Inherited from Control)
IsAccessible	Gets or sets a value indicating whether the control is visible to accessibility applications. (Inherited from Control)
IsAncestorSiteInDesignMode	Indicates if one of the Ancestors of this control is sited and that site in DesignMode. This property is read-only. (Inherited from Control)
IsDisposed	Gets a value indicating whether the control has been disposed of. (Inherited from Control)
IsHandleCreated	Gets a value indicating whether the control has a handle associated with it. (Inherited from Control)
IsMirrored	Gets a value indicating whether the control is mirrored. (Inherited from Control)
ItemHeight	Gets or sets the height of each tree node in the tree view control.
LabelEdit	Gets or sets a value indicating whether the label text of the tree nodes can be edited.
LayoutEngine	Gets a cached instance of the control's layout engine. (Inherited from Control)
Left	Gets or sets the distance, in pixels, between the left edge of the control and the left edge of its container's client area. (Inherited from Control)
LineColor	Gets or sets the color of the lines connecting the nodes of the TreeView control.
Location	Gets or sets the coordinates of the upper-left corner of the control relative to the upper-left corner of its container. (Inherited from Control)
Margin	Gets or sets the space between controls. (Inherited from Control)
MaximumSize	Gets or sets the size that is the upper limit that GetPreferredSize(Size) can specify. (Inherited from Control)
MinimumSize	Gets or sets the size that is the lower limit that GetPreferredSize(Size) can specify. (Inherited from Control)
Name	Gets or sets the name of the control. (Inherited from Control)
Nodes	Gets the collection of tree nodes that are assigned to the tree view control.
Padding	Gets or sets the spacing between the TreeView control's contents and its edges.
Parent	Gets or sets the parent container of the control. (Inherited from Control)
PathSeparator	Gets or sets the delimiter string that the tree node path uses.
PreferredSize	Gets the size of a rectangular area into which the control can fit. (Inherited from Control)
ProductName	Gets the product name of the assembly containing the control. (Inherited from Control)
ProductVersion	Gets the version of the assembly containing the control. (Inherited from Control)
RecreatingHandle	Gets a value indicating whether the control is currently re-creating its handle. (Inherited from Control)
Region	Gets or sets the window region associated with the control. (Inherited from Control)
RenderRightToLeft	Obsolete. This property is now obsolete. (Inherited from Control)
ResizeRedraw	Gets or sets a value indicating whether the control redraws itself when resized. (Inherited from Control)
Right	Gets the distance, in pixels, between the right edge of the control and the left edge of its container's client area. (Inherited from Control)
RightToLeft	Gets or sets a value indicating whether control's elements are aligned to support locales using right-to-left fonts. (Inherited from Control)
RightToLeftLayout	Gets or sets a value that indicates whether the TreeView should be laid out from right-to-left.
ScaleChildren	Gets a value that determines the scaling of child controls. (Inherited from Control)
Scrollable	Gets or sets a value indicating whether the tree view control displays scroll bars when they are needed.
SelectedImageIndex	Gets or sets the image list index value of the image that is displayed when a tree node is selected.
SelectedImageKey	Gets or sets the key of the default image shown when a TreeNode is in a selected state.
SelectedNode	Gets or sets the tree node that is currently selected in the tree view control.
ShowFocusCues	Gets a value indicating whether the control should display focus rectangles. (Inherited from Control)
ShowKeyboardCues	Gets a value indicating whether the user interface is in the appropriate state to show or hide keyboard accelerators. (Inherited from Control)
ShowLines	Gets or sets a value indicating whether lines are drawn between tree nodes in the tree view control.
ShowNodeToolTips	Gets or sets a value indicating ToolTips are shown when the mouse pointer hovers over a TreeNode.
ShowPlusMinus	Gets or sets a value indicating whether plus-sign (+) and minus-sign (-) buttons are displayed next to tree nodes that contain child tree nodes.
ShowRootLines	Gets or sets a value indicating whether lines are drawn between the tree nodes that are at the root of the tree view.
Site	Gets or sets the site of the control. (Inherited from Control)
Size	Gets or sets the height and width of the control. (Inherited from Control)
Sorted	Gets or sets a value indicating whether the tree nodes in the tree view are sorted.
StateImageList	Gets or sets the image list that is used to indicate the state of the TreeView and its nodes.
TabIndex	Gets or sets the tab order of the control within its container. (Inherited from Control)
TabStop	Gets or sets a value indicating whether the user can give the focus to this control using the TAB key. (Inherited from Control)
Tag	Gets or sets the object that contains data about the control. (Inherited from Control)
Text	Gets or sets the text of the TreeView.
Top	Gets or sets the distance, in pixels, between the top edge of the control and the top edge of its container's client area. (Inherited from Control)
TopLevelControl	Gets the parent control that is not parented by another Windows Forms control. Typically, this is the outermost Form that the control is contained in. (Inherited from Control)
TopNode	Gets or sets the first fully-visible tree node in the tree view control.
TreeViewNodeSorter	Gets or sets the implementation of IComparer to perform a custom sort of the TreeView nodes.
UseWaitCursor	Gets or sets a value indicating whether to use the wait cursor for the current control and all child controls. (Inherited from Control)
Visible	Gets or sets a value indicating whether the control and all its child controls are displayed. (Inherited from Control)
VisibleCount	Gets the number of tree nodes that can be fully visible in the tree view control.
Width	Gets or sets the width of the control. (Inherited from Control)
WindowTarget	This property is not relevant for this class. (Inherited from Control)

Methods

AccessibilityNotifyClients(AccessibleEvents, Int32, Int32)	Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control . (Inherited from Control)
AccessibilityNotifyClients(AccessibleEvents, Int32)	Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control. (Inherited from Control)
BeginInvoke(Action)	Executes the specified delegate asynchronously on the thread that the control's underlying handle was created on. (Inherited from Control)
BeginInvoke(Delegate, Object[])	Executes the specified delegate asynchronously with the specified arguments, on the thread that the control's underlying handle was created on. (Inherited from Control)
BeginInvoke(Delegate)	Executes the specified delegate asynchronously on the thread that the control's underlying handle was created on. (Inherited from Control)
BeginUpdate()	Disables any redrawing of the tree view.
BringToFront()	Brings the control to the front of the z-order. (Inherited from Control)
CollapseAll()	Collapses all the tree nodes.
Contains(Control)	Retrieves a value indicating whether the specified control is a child of the control. (Inherited from Control)
CreateAccessibilityInstance()	Creates the new instance of AccessibleObject for this TreeView control.
CreateControl()	Forces the creation of the visible control, including the creation of the handle and any visible child controls. (Inherited from Control)
CreateControlsInstance()	Creates a new instance of the control collection for the control. (Inherited from Control)
CreateGraphics()	Creates the Graphics for the control. (Inherited from Control)
CreateHandle()	Creates a handle for the control.
CreateObjRef(Type)	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject)
DefWndProc(Message)	Sends the specified message to the default window procedure. (Inherited from Control)
DestroyHandle()	Destroys the handle associated with the control. (Inherited from Control)
Dispose()	Releases all resources used by the Component. (Inherited from Component)
Dispose(Boolean)	Releases the unmanaged resources used by the TreeView and optionally releases the managed resources.
DoDragDrop(Object, DragDropEffects, Bitmap, Point, Boolean)	Begins a drag operation. (Inherited from Control)
DoDragDrop(Object, DragDropEffects)	Begins a drag-and-drop operation. (Inherited from Control)
DrawToBitmap(Bitmap, Rectangle)	Supports rendering to the specified bitmap. (Inherited from Control)
EndInvoke(IAsyncResult)	Retrieves the return value of the asynchronous operation represented by the IAsyncResult passed. (Inherited from Control)
EndUpdate()	Enables the redrawing of the tree view.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
ExpandAll()	Expands all the tree nodes.
FindForm()	Retrieves the form that the control is on. (Inherited from Control)
Focus()	Sets input focus to the control. (Inherited from Control)
GetAccessibilityObjectById(Int32)	Retrieves the specified AccessibleObject. (Inherited from Control)
GetAutoSizeMode()	Retrieves a value indicating how a control will behave when its AutoSize property is enabled. (Inherited from Control)
GetChildAtPoint(Point, GetChildAtPointSkip)	Retrieves the child control that is located at the specified coordinates, specifying whether to ignore child controls of a certain type. (Inherited from Control)
GetChildAtPoint(Point)	Retrieves the child control that is located at the specified coordinates. (Inherited from Control)
GetContainerControl()	Returns the next ContainerControl up the control's chain of parent controls. (Inherited from Control)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetItemRenderStyles(TreeNode, Int32)	Returns an OwnerDrawPropertyBag for the specified TreeNode.
GetLifetimeService()	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject)
GetNextControl(Control, Boolean)	Retrieves the next control forward or back in the tab order of child controls. (Inherited from Control)
GetNodeAt(Int32, Int32)	Retrieves the tree node at the point with the specified coordinates.
GetNodeAt(Point)	Retrieves the tree node that is at the specified point.
GetNodeCount(Boolean)	Retrieves the number of tree nodes, optionally including those in all subtrees, assigned to the tree view control.
GetPreferredSize(Size)	Retrieves the size of a rectangular area into which a control can be fitted. (Inherited from Control)
GetScaledBounds(Rectangle, SizeF, BoundsSpecified)	Retrieves the bounds within which the control is scaled. (Inherited from Control)
GetService(Type)	Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component)
GetStyle(ControlStyles)	Retrieves the value of the specified control style bit for the control. (Inherited from Control)
GetTopLevel()	Determines if the control is a top-level control. (Inherited from Control)
GetType()	Gets the Type of the current instance. (Inherited from Object)
Hide()	Conceals the control from the user. (Inherited from Control)
HitTest(Int32, Int32)	Provides node information, given x- and y-coordinates.
HitTest(Point)	Provides node information, given a point.
InitializeLifetimeService()	Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject)
InitLayout()	Called after the control has been added to another container. (Inherited from Control)
Invalidate()	Invalidates the entire surface of the control and causes the control to be redrawn. (Inherited from Control)
Invalidate(Boolean)	Invalidates a specific region of the control and causes a paint message to be sent to the control. Optionally, invalidates the child controls assigned to the control. (Inherited from Control)
Invalidate(Rectangle, Boolean)	Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control. Optionally, invalidates the child controls assigned to the control. (Inherited from Control)
Invalidate(Rectangle)	Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control. (Inherited from Control)
Invalidate(Region, Boolean)	Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control. Optionally, invalidates the child controls assigned to the control. (Inherited from Control)
Invalidate(Region)	Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control. (Inherited from Control)
Invoke(Action)	Executes the specified delegate on the thread that owns the control's underlying window handle. (Inherited from Control)
Invoke(Delegate, Object[])	Executes the specified delegate, on the thread that owns the control's underlying window handle, with the specified list of arguments. (Inherited from Control)
Invoke(Delegate)	Executes the specified delegate on the thread that owns the control's underlying window handle. (Inherited from Control)
Invoke<T>(Func<T>)	Executes the specified delegate on the thread that owns the control's underlying window handle. (Inherited from Control)
InvokeAsync(Action, CancellationToken)	Invokes the specified synchronous callback asynchronously on the thread that owns the control's handle. (Inherited from Control)
InvokeAsync(Func<CancellationToken,ValueTask>, CancellationToken)	Executes the specified asynchronous callback on the thread that owns the control's handle asynchronously. (Inherited from Control)
InvokeAsync<T>(Func<CancellationToken,ValueTask<T>>, CancellationToken)	Executes the specified asynchronous callback on the thread that owns the control's handle. (Inherited from Control)
InvokeAsync<T>(Func<T>, CancellationToken)	Invokes the specified synchronous callback asynchronously on the thread that owns the control's handle. (Inherited from Control)
InvokeGotFocus(Control, EventArgs)	Raises the GotFocus event for the specified control. (Inherited from Control)
InvokeLostFocus(Control, EventArgs)	Raises the LostFocus event for the specified control. (Inherited from Control)
InvokeOnClick(Control, EventArgs)	Raises the Click event for the specified control. (Inherited from Control)
InvokePaint(Control, PaintEventArgs)	Raises the Paint event for the specified control. (Inherited from Control)
InvokePaintBackground(Control, PaintEventArgs)	Raises the PaintBackground event for the specified control. (Inherited from Control)
IsInputChar(Char)	Determines if a character is an input character that the control recognizes. (Inherited from Control)
IsInputKey(Keys)	Determines whether the specified key is a regular input key or a special key that requires preprocessing.
LogicalToDeviceUnits(Int32)	Converts a Logical DPI value to its equivalent DeviceUnit DPI value. (Inherited from Control)
LogicalToDeviceUnits(Size)	Transforms a size from logical to device units by scaling it for the current DPI and rounding down to the nearest integer value for width and height. (Inherited from Control)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
MemberwiseClone(Boolean)	Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject)
NotifyInvalidate(Rectangle)	Raises the Invalidated event with a specified region of the control to invalidate. (Inherited from Control)
OnAfterCheck(TreeViewEventArgs)	Raises the AfterCheck event.
OnAfterCollapse(TreeViewEventArgs)	Raises the AfterCollapse event.
OnAfterExpand(TreeViewEventArgs)	Raises the AfterExpand event.
OnAfterLabelEdit(NodeLabelEditEventArgs)	Raises the AfterLabelEdit event.
OnAfterSelect(TreeViewEventArgs)	Raises the AfterSelect event.
OnAutoSizeChanged(EventArgs)	Raises the AutoSizeChanged event. (Inherited from Control)
OnBackColorChanged(EventArgs)	Raises the BackColorChanged event. (Inherited from Control)
OnBackgroundImageChanged(EventArgs)	Raises the BackgroundImageChanged event. (Inherited from Control)
OnBackgroundImageLayoutChanged(EventArgs)	Raises the BackgroundImageLayoutChanged event. (Inherited from Control)
OnBeforeCheck(TreeViewCancelEventArgs)	Raises the BeforeCheck event.
OnBeforeCollapse(TreeViewCancelEventArgs)	Raises the BeforeCollapse event.
OnBeforeExpand(TreeViewCancelEventArgs)	Raises the BeforeExpand event.
OnBeforeLabelEdit(NodeLabelEditEventArgs)	Raises the BeforeLabelEdit event.
OnBeforeSelect(TreeViewCancelEventArgs)	Raises the BeforeSelect event.
OnBindingContextChanged(EventArgs)	Raises the BindingContextChanged event. (Inherited from Control)
OnCausesValidationChanged(EventArgs)	Raises the CausesValidationChanged event. (Inherited from Control)
OnChangeUICues(UICuesEventArgs)	Raises the ChangeUICues event. (Inherited from Control)
OnClick(EventArgs)	Raises the Click event. (Inherited from Control)
OnClientSizeChanged(EventArgs)	Raises the ClientSizeChanged event. (Inherited from Control)
OnContextMenuChanged(EventArgs)	Raises the ContextMenuChanged event. (Inherited from Control)
OnContextMenuStripChanged(EventArgs)	Raises the ContextMenuStripChanged event. (Inherited from Control)
OnControlAdded(ControlEventArgs)	Raises the ControlAdded event. (Inherited from Control)
OnControlRemoved(ControlEventArgs)	Raises the ControlRemoved event. (Inherited from Control)
OnCreateControl()	Raises the CreateControl() method. (Inherited from Control)
OnCursorChanged(EventArgs)	Raises the CursorChanged event. (Inherited from Control)
OnDataContextChanged(EventArgs)	(Inherited from Control)
OnDockChanged(EventArgs)	Raises the DockChanged event. (Inherited from Control)
OnDoubleClick(EventArgs)	Raises the DoubleClick event. (Inherited from Control)
OnDpiChangedAfterParent(EventArgs)	Raises the DpiChangedAfterParent event. (Inherited from Control)
OnDpiChangedBeforeParent(EventArgs)	Raises the DpiChangedBeforeParent event. (Inherited from Control)
OnDragDrop(DragEventArgs)	Raises the DragDrop event. (Inherited from Control)
OnDragEnter(DragEventArgs)	Raises the DragEnter event. (Inherited from Control)
OnDragLeave(EventArgs)	Raises the DragLeave event. (Inherited from Control)
OnDragOver(DragEventArgs)	Raises the DragOver event. (Inherited from Control)
OnDrawNode(DrawTreeNodeEventArgs)	Raises the DrawNode event.
OnEnabledChanged(EventArgs)	Raises the EnabledChanged event. (Inherited from Control)
OnEnter(EventArgs)	Raises the Enter event. (Inherited from Control)
OnFontChanged(EventArgs)	Raises the FontChanged event. (Inherited from Control)
OnForeColorChanged(EventArgs)	Raises the ForeColorChanged event. (Inherited from Control)
OnGiveFeedback(GiveFeedbackEventArgs)	Raises the GiveFeedback event. (Inherited from Control)
OnGotFocus(EventArgs)
OnHandleCreated(EventArgs)	Overrides OnHandleCreated(EventArgs).
OnHandleDestroyed(EventArgs)	Overrides OnHandleDestroyed(EventArgs).
OnHelpRequested(HelpEventArgs)	Raises the HelpRequested event. (Inherited from Control)
OnImeModeChanged(EventArgs)	Raises the ImeModeChanged event. (Inherited from Control)
OnInvalidated(InvalidateEventArgs)	Raises the Invalidated event. (Inherited from Control)
OnItemDrag(ItemDragEventArgs)	Raises the ItemDrag event.
OnKeyDown(KeyEventArgs)	Raises the KeyDown event.
OnKeyPress(KeyPressEventArgs)	Raises the KeyPress event.
OnKeyUp(KeyEventArgs)	Overrides OnKeyUp(KeyEventArgs).
OnLayout(LayoutEventArgs)	Raises the Layout event. (Inherited from Control)
OnLeave(EventArgs)	Raises the Leave event. (Inherited from Control)
OnLocationChanged(EventArgs)	Raises the LocationChanged event. (Inherited from Control)
OnLostFocus(EventArgs)
OnMarginChanged(EventArgs)	Raises the MarginChanged event. (Inherited from Control)
OnMouseCaptureChanged(EventArgs)	Raises the MouseCaptureChanged event. (Inherited from Control)
OnMouseClick(MouseEventArgs)	Raises the MouseClick event. (Inherited from Control)
OnMouseDoubleClick(MouseEventArgs)	Raises the MouseDoubleClick event. (Inherited from Control)
OnMouseDown(MouseEventArgs)	Raises the MouseDown event. (Inherited from Control)
OnMouseEnter(EventArgs)	Raises the MouseEnter event. (Inherited from Control)
OnMouseHover(EventArgs)	Raises the MouseHover event.
OnMouseLeave(EventArgs)	Raises the MouseLeave event.
OnMouseMove(MouseEventArgs)	Raises the MouseMove event. (Inherited from Control)
OnMouseUp(MouseEventArgs)	Raises the MouseUp event. (Inherited from Control)
OnMouseWheel(MouseEventArgs)	Raises the MouseWheel event. (Inherited from Control)
OnMove(EventArgs)	Raises the Move event. (Inherited from Control)
OnNodeMouseClick(TreeNodeMouseClickEventArgs)	Raises the NodeMouseClick event.
OnNodeMouseDoubleClick(TreeNodeMouseClickEventArgs)	Raises the NodeMouseDoubleClick event.
OnNodeMouseHover(TreeNodeMouseHoverEventArgs)	Raises the NodeMouseHover event.
OnNotifyMessage(Message)	Notifies the control of Windows messages. (Inherited from Control)
OnPaddingChanged(EventArgs)	Raises the PaddingChanged event. (Inherited from Control)
OnPaint(PaintEventArgs)	Raises the Paint event. (Inherited from Control)
OnPaintBackground(PaintEventArgs)	Paints the background of the control. (Inherited from Control)
OnParentBackColorChanged(EventArgs)	Raises the BackColorChanged event when the BackColor property value of the control's container changes. (Inherited from Control)
OnParentBackgroundImageChanged(EventArgs)	Raises the BackgroundImageChanged event when the BackgroundImage property value of the control's container changes. (Inherited from Control)
OnParentBindingContextChanged(EventArgs)	Raises the BindingContextChanged event when the BindingContext property value of the control's container changes. (Inherited from Control)
OnParentChanged(EventArgs)	Raises the ParentChanged event. (Inherited from Control)
OnParentCursorChanged(EventArgs)	Raises the CursorChanged event. (Inherited from Control)
OnParentDataContextChanged(EventArgs)	(Inherited from Control)
OnParentEnabledChanged(EventArgs)	Raises the EnabledChanged event when the Enabled property value of the control's container changes. (Inherited from Control)
OnParentFontChanged(EventArgs)	Raises the FontChanged event when the Font property value of the control's container changes. (Inherited from Control)
OnParentForeColorChanged(EventArgs)	Raises the ForeColorChanged event when the ForeColor property value of the control's container changes. (Inherited from Control)
OnParentRightToLeftChanged(EventArgs)	Raises the RightToLeftChanged event when the RightToLeft property value of the control's container changes. (Inherited from Control)
OnParentVisibleChanged(EventArgs)	Raises the VisibleChanged event when the Visible property value of the control's container changes. (Inherited from Control)
OnPreviewKeyDown(PreviewKeyDownEventArgs)	Raises the PreviewKeyDown event. (Inherited from Control)
OnPrint(PaintEventArgs)	Raises the Paint event. (Inherited from Control)
OnQueryContinueDrag(QueryContinueDragEventArgs)	Raises the QueryContinueDrag event. (Inherited from Control)
OnRegionChanged(EventArgs)	Raises the RegionChanged event. (Inherited from Control)
OnResize(EventArgs)	Raises the Resize event. (Inherited from Control)
OnRightToLeftChanged(EventArgs)	Raises the RightToLeftChanged event. (Inherited from Control)
OnRightToLeftLayoutChanged(EventArgs)	Raises the RightToLeftLayoutChanged event.
OnSizeChanged(EventArgs)	Raises the SizeChanged event. (Inherited from Control)
OnStyleChanged(EventArgs)	Raises the StyleChanged event. (Inherited from Control)
OnSystemColorsChanged(EventArgs)	Raises the SystemColorsChanged event. (Inherited from Control)
OnTabIndexChanged(EventArgs)	Raises the TabIndexChanged event. (Inherited from Control)
OnTabStopChanged(EventArgs)	Raises the TabStopChanged event. (Inherited from Control)
OnTextChanged(EventArgs)	Raises the TextChanged event. (Inherited from Control)
OnValidated(EventArgs)	Raises the Validated event. (Inherited from Control)
OnValidating(CancelEventArgs)	Raises the Validating event. (Inherited from Control)
OnVisibleChanged(EventArgs)	Raises the VisibleChanged event. (Inherited from Control)
PerformLayout()	Forces the control to apply layout logic to all its child controls. (Inherited from Control)
PerformLayout(Control, String)	Forces the control to apply layout logic to all its child controls. (Inherited from Control)
PointToClient(Point)	Computes the location of the specified screen point into client coordinates. (Inherited from Control)
PointToScreen(Point)	Computes the location of the specified client point into screen coordinates. (Inherited from Control)
PreProcessControlMessage(Message)	Preprocesses keyboard or input messages within the message loop before they are dispatched. (Inherited from Control)
PreProcessMessage(Message)	Preprocesses keyboard or input messages within the message loop before they are dispatched. (Inherited from Control)
ProcessCmdKey(Message, Keys)	Processes a command key. (Inherited from Control)
ProcessDialogChar(Char)	Processes a dialog character. (Inherited from Control)
ProcessDialogKey(Keys)	Processes a dialog key. (Inherited from Control)
ProcessKeyEventArgs(Message)	Processes a key message and generates the appropriate control events. (Inherited from Control)
ProcessKeyMessage(Message)	Processes a keyboard message. (Inherited from Control)
ProcessKeyPreview(Message)	Previews a keyboard message. (Inherited from Control)
ProcessMnemonic(Char)	Processes a mnemonic character. (Inherited from Control)
RaiseDragEvent(Object, DragEventArgs)	Raises the appropriate drag event. (Inherited from Control)
RaiseKeyEvent(Object, KeyEventArgs)	Raises the appropriate key event. (Inherited from Control)
RaiseMouseEvent(Object, MouseEventArgs)	Raises the appropriate mouse event. (Inherited from Control)
RaisePaintEvent(Object, PaintEventArgs)	Raises the appropriate paint event. (Inherited from Control)
RecreateHandle()	Forces the re-creation of the handle for the control. (Inherited from Control)
RectangleToClient(Rectangle)	Computes the size and location of the specified screen rectangle in client coordinates. (Inherited from Control)
RectangleToScreen(Rectangle)	Computes the size and location of the specified client rectangle in screen coordinates. (Inherited from Control)
Refresh()	Forces the control to invalidate its client area and immediately redraw itself and any child controls. (Inherited from Control)
RescaleConstantsForDpi(Int32, Int32)	Provides constants for rescaling the control when a DPI change occurs. (Inherited from Control)
ResetBackColor()	Resets the BackColor property to its default value. (Inherited from Control)
ResetBindings()	Causes a control bound to the BindingSource to reread all the items in the list and refresh their displayed values. (Inherited from Control)
ResetCursor()	Resets the Cursor property to its default value. (Inherited from Control)
ResetFont()	Resets the Font property to its default value. (Inherited from Control)
ResetForeColor()	Resets the ForeColor property to its default value. (Inherited from Control)
ResetImeMode()	Resets the ImeMode property to its default value. (Inherited from Control)
ResetMouseEventArgs()	Resets the control to handle the MouseLeave event. (Inherited from Control)
ResetRightToLeft()	Resets the RightToLeft property to its default value. (Inherited from Control)
ResetText()	Resets the Text property to its default value (Empty). (Inherited from Control)
ResumeLayout()	Resumes usual layout logic. (Inherited from Control)
ResumeLayout(Boolean)	Resumes usual layout logic, optionally forcing an immediate layout of pending layout requests. (Inherited from Control)
RtlTranslateAlignment(ContentAlignment)	Converts the specified ContentAlignment to the appropriate ContentAlignment to support right-to-left text. (Inherited from Control)
RtlTranslateAlignment(HorizontalAlignment)	Converts the specified HorizontalAlignment to the appropriate HorizontalAlignment to support right-to-left text. (Inherited from Control)
RtlTranslateAlignment(LeftRightAlignment)	Converts the specified LeftRightAlignment to the appropriate LeftRightAlignment to support right-to-left text. (Inherited from Control)
RtlTranslateContent(ContentAlignment)	Converts the specified ContentAlignment to the appropriate ContentAlignment to support right-to-left text. (Inherited from Control)
RtlTranslateHorizontal(HorizontalAlignment)	Converts the specified HorizontalAlignment to the appropriate HorizontalAlignment to support right-to-left text. (Inherited from Control)
RtlTranslateLeftRight(LeftRightAlignment)	Converts the specified LeftRightAlignment to the appropriate LeftRightAlignment to support right-to-left text. (Inherited from Control)
Scale(Single, Single)	Obsolete. Scales the entire control and any child controls. (Inherited from Control)
Scale(Single)	Obsolete. Scales the control and any child controls. (Inherited from Control)
Scale(SizeF)	Scales the control and all child controls by the specified scaling factor. (Inherited from Control)
ScaleBitmapLogicalToDevice(Bitmap)	Scales a logical bitmap value to it's equivalent device unit value when a DPI change occurs. (Inherited from Control)
ScaleControl(SizeF, BoundsSpecified)	Scales a control's location, size, padding and margin. (Inherited from Control)
ScaleCore(Single, Single)	This method is not relevant for this class. (Inherited from Control)
Select()	Activates the control. (Inherited from Control)
Select(Boolean, Boolean)	Activates a child control. Optionally specifies the direction in the tab order to select the control from. (Inherited from Control)
SelectNextControl(Control, Boolean, Boolean, Boolean, Boolean)	Activates the next control. (Inherited from Control)
SendToBack()	Sends the control to the back of the z-order. (Inherited from Control)
SetAutoSizeMode(AutoSizeMode)	Sets a value indicating how a control will behave when its AutoSize property is enabled. (Inherited from Control)
SetBounds(Int32, Int32, Int32, Int32, BoundsSpecified)	Sets the specified bounds of the control to the specified location and size. (Inherited from Control)
SetBounds(Int32, Int32, Int32, Int32)	Sets the bounds of the control to the specified location and size. (Inherited from Control)
SetBoundsCore(Int32, Int32, Int32, Int32, BoundsSpecified)	Performs the work of setting the specified bounds of this control. (Inherited from Control)
SetClientSizeCore(Int32, Int32)	Sets the size of the client area of the control. (Inherited from Control)
SetStyle(ControlStyles, Boolean)	Sets a specified ControlStyles flag to either true or false. (Inherited from Control)
SetTopLevel(Boolean)	Sets the control as the top-level control. (Inherited from Control)
SetVisibleCore(Boolean)	Sets the control to the specified visible state. (Inherited from Control)
Show()	Displays the control to the user. (Inherited from Control)
SizeFromClientSize(Size)	Determines the size of the entire control from the height and width of its client area. (Inherited from Control)
Sort()	Sorts the items in TreeView control.
SuspendLayout()	Temporarily suspends the layout logic for the control. (Inherited from Control)
ToString()	Returns a String containing the name of the Component, if any. This method should not be overridden.
Update()	Causes the control to redraw the invalidated regions within its client area. (Inherited from Control)
UpdateBounds()	Updates the bounds of the control with the current size and location. (Inherited from Control)
UpdateBounds(Int32, Int32, Int32, Int32, Int32, Int32)	Updates the bounds of the control with the specified size, location, and client size. (Inherited from Control)
UpdateBounds(Int32, Int32, Int32, Int32)	Updates the bounds of the control with the specified size and location. (Inherited from Control)
UpdateStyles()	Forces the assigned styles to be reapplied to the control. (Inherited from Control)
UpdateZOrder()	Updates the control in its parent's z-order. (Inherited from Control)
WndProc(Message)	Overrides WndProc(Message).

Events

AfterCheck	Occurs after the tree node check box is checked.
AfterCollapse	Occurs after the tree node is collapsed.
AfterExpand	Occurs after the tree node is expanded.
AfterLabelEdit	Occurs after the tree node label text is edited.
AfterSelect	Occurs after the tree node is selected.
AutoSizeChanged	This event is not relevant for this class. (Inherited from Control)
BackColorChanged	Occurs when the value of the BackColor property changes. (Inherited from Control)
BackgroundImageChanged	Occurs when the BackgroundImage property changes.
BackgroundImageLayoutChanged	Occurs when the BackgroundImageLayout property changes.
BeforeCheck	Occurs before the tree node check box is checked.
BeforeCollapse	Occurs before the tree node is collapsed.
BeforeExpand	Occurs before the tree node is expanded.
BeforeLabelEdit	Occurs before the tree node label text is edited.
BeforeSelect	Occurs before the tree node is selected.
BindingContextChanged	Occurs when the value of the BindingContext property changes. (Inherited from Control)
CausesValidationChanged	Occurs when the value of the CausesValidation property changes. (Inherited from Control)
ChangeUICues	Occurs when the focus or keyboard user interface (UI) cues change. (Inherited from Control)
Click	Occurs when the control is clicked. (Inherited from Control)
ClientSizeChanged	Occurs when the value of the ClientSize property changes. (Inherited from Control)
ContextMenuChanged	Occurs when the value of the ContextMenu property changes. (Inherited from Control)
ContextMenuStripChanged	Occurs when the value of the ContextMenuStrip property changes. (Inherited from Control)
ControlAdded	Occurs when a new control is added to the Control.ControlCollection. (Inherited from Control)
ControlRemoved	Occurs when a control is removed from the Control.ControlCollection. (Inherited from Control)
CursorChanged	Occurs when the value of the Cursor property changes. (Inherited from Control)
DataContextChanged	Occurs when the value of the DataContext property changes. (Inherited from Control)
Disposed	Occurs when the component is disposed by a call to the Dispose() method. (Inherited from Component)
DockChanged	Occurs when the value of the Dock property changes. (Inherited from Control)
DoubleClick	Occurs when the control is double-clicked. (Inherited from Control)
DpiChangedAfterParent	Occurs when the DPI setting for a control is changed programmatically after the DPI of its parent control or form has changed. (Inherited from Control)
DpiChangedBeforeParent	Occurs when the DPI setting for a control is changed programmatically before a DPI change event for its parent control or form has occurred. (Inherited from Control)
DragDrop	Occurs when a drag-and-drop operation is completed. (Inherited from Control)
DragEnter	Occurs when an object is dragged into the control's bounds. (Inherited from Control)
DragLeave	Occurs when an object is dragged out of the control's bounds. (Inherited from Control)
DragOver	Occurs when an object is dragged over the control's bounds. (Inherited from Control)
DrawNode	Occurs when a TreeView is drawn and the DrawMode property is set to a TreeViewDrawMode value other than Normal.
EnabledChanged	Occurs when the Enabled property value has changed. (Inherited from Control)
Enter	Occurs when the control is entered. (Inherited from Control)
FontChanged	Occurs when the Font property value changes. (Inherited from Control)
ForeColorChanged	Occurs when the ForeColor property value changes. (Inherited from Control)
GiveFeedback	Occurs during a drag operation. (Inherited from Control)
GotFocus	Occurs when the control receives focus. (Inherited from Control)
HandleCreated	Occurs when a handle is created for the control. (Inherited from Control)
HandleDestroyed	Occurs when the control's handle is in the process of being destroyed. (Inherited from Control)
HelpRequested	Occurs when the user requests help for a control. (Inherited from Control)
ImeModeChanged	Occurs when the ImeMode property has changed. (Inherited from Control)
Invalidated	Occurs when a control's display requires redrawing. (Inherited from Control)
ItemDrag	Occurs when the user begins dragging a node.
KeyDown	Occurs when a key is pressed while the control has focus. (Inherited from Control)
KeyPress	Occurs when a character, space, or backspace key is pressed while the control has focus. (Inherited from Control)
KeyUp	Occurs when a key is released while the control has focus. (Inherited from Control)
Layout	Occurs when a control should reposition its child controls. (Inherited from Control)
Leave	Occurs when the input focus leaves the control. (Inherited from Control)
LocationChanged	Occurs when the Location property value has changed. (Inherited from Control)
LostFocus	Occurs when the control loses focus. (Inherited from Control)
MarginChanged	Occurs when the control's margin changes. (Inherited from Control)
MouseCaptureChanged	Occurs when the control loses mouse capture. (Inherited from Control)
MouseClick	Occurs when the control is clicked by the mouse. (Inherited from Control)
MouseDoubleClick	Occurs when the control is double clicked by the mouse. (Inherited from Control)
MouseDown	Occurs when the mouse pointer is over the control and a mouse button is pressed. (Inherited from Control)
MouseEnter	Occurs when the mouse pointer enters the control. (Inherited from Control)
MouseHover	Occurs when the mouse pointer rests on the control. (Inherited from Control)
MouseLeave	Occurs when the mouse pointer leaves the control. (Inherited from Control)
MouseMove	Occurs when the mouse pointer is moved over the control. (Inherited from Control)
MouseUp	Occurs when the mouse pointer is over the control and a mouse button is released. (Inherited from Control)
MouseWheel	Occurs when the mouse wheel moves while the control has focus. (Inherited from Control)
Move	Occurs when the control is moved. (Inherited from Control)
NodeMouseClick	Occurs when the user clicks a TreeNode with the mouse.
NodeMouseDoubleClick	Occurs when the user double-clicks a TreeNode with the mouse.
NodeMouseHover	Occurs when the mouse hovers over a TreeNode.
PaddingChanged	Occurs when the value of the Padding property changes.
Paint	Occurs when the TreeView is drawn.
ParentChanged	Occurs when the Parent property value changes. (Inherited from Control)
PreviewKeyDown	Occurs before the KeyDown event when a key is pressed while focus is on this control. (Inherited from Control)
QueryAccessibilityHelp	Occurs when AccessibleObject is providing help to accessibility applications. (Inherited from Control)
QueryContinueDrag	Occurs during a drag-and-drop operation and enables the drag source to determine whether the drag-and-drop operation should be canceled. (Inherited from Control)
RegionChanged	Occurs when the value of the Region property changes. (Inherited from Control)
Resize	Occurs when the control is resized. (Inherited from Control)
RightToLeftChanged	Occurs when the RightToLeft property value changes. (Inherited from Control)
RightToLeftLayoutChanged	Occurs when the value of the RightToLeftLayout property changes.
SizeChanged	Occurs when the Size property value changes. (Inherited from Control)
StyleChanged	Occurs when the control style changes. (Inherited from Control)
SystemColorsChanged	Occurs when the system colors change. (Inherited from Control)
TabIndexChanged	Occurs when the TabIndex property value changes. (Inherited from Control)
TabStopChanged	Occurs when the TabStop property value changes. (Inherited from Control)
TextChanged	Occurs when the Text property changes.
Validated	Occurs when the control is finished validating. (Inherited from Control)
Validating	Occurs when the control is validating. (Inherited from Control)
VisibleChanged	Occurs when the Visible property value changes. (Inherited from Control)

Explicit Interface Implementations

IDropTarget.OnDragDrop(DragEventArgs)	Raises the DragDrop event. (Inherited from Control)
IDropTarget.OnDragEnter(DragEventArgs)	Raises the DragEnter event. (Inherited from Control)
IDropTarget.OnDragLeave(EventArgs)	Raises the DragLeave event. (Inherited from Control)
IDropTarget.OnDragOver(DragEventArgs)	Raises the DragOver event. (Inherited from Control)

See also

• TreeNode