MenuItemStyleCollection Class
Definition
Important
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Represents a collection of MenuItemStyle objects in a Menu control. This class cannot be inherited.
public ref class MenuItemStyleCollection sealed : System::Web::UI::StateManagedCollectionpublic sealed class MenuItemStyleCollection : System.Web.UI.StateManagedCollectiontype MenuItemStyleCollection = class
inherit StateManagedCollectionPublic NotInheritable Class MenuItemStyleCollection
Inherits StateManagedCollection- Inheritance
Examples
The following code example demonstrates how to use the MenuItemStyleCollection class to specify the style settings for the menu items in a Menu control based on the menu item's level. In this example, the LevelMenuItemStyles property is created declaratively, and one MenuItemStyle object is removed and another added to the MenuItemStyleCollection object.
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
if (!IsPostBack)
{
// Use the Add and RemoveAt methods to programmatically
// remove the third level menu item style and replace
// it with a new style, in this case replacing the green background
// and yellow text with the blue background and white text.
MenuItemStyle newStyle = new MenuItemStyle();
newStyle.BackColor = System.Drawing.Color.Blue;
newStyle.ForeColor = System.Drawing.Color.White;
// Remove the last of the three menu item styles. Note that
// since the collection has a zero-based index, the third
// entry has an index value of 2.
MainMenuID.LevelMenuItemStyles.RemoveAt(2);
MainMenuID.LevelMenuItemStyles.Add(newStyle);
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItemStyleCollection Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItemStyleCollection Example</h3>
<!--Add MenuItemStyle objects to the MenuItemStyleCollection -->
<!--using LevelMenuItemStyles. -->
<!--Note that each menu item style represents a level in the menu -->
<asp:Menu id="MainMenuID"
Font-Names= "Arial"
ForeColor="Blue"
runat="server">
<LevelMenuItemStyles>
<asp:MenuItemStyle BackColor="Azure"
Font-Italic="true"
Font-Names="Arial"
ForeColor="Black" />
<asp:MenuItemStyle BackColor="Black"
Font-Italic="false"
Font-Names="Arial"
ForeColor="White" />
<asp:MenuItemStyle BackColor="Green"
Font-Italic="true"
Font-Names="Arial"
ForeColor="Yellow" />
</LevelMenuItemStyles>
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:Menu>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub Page_Load(ByVal sender As [Object], ByVal e As EventArgs)
If Not IsPostBack Then
' Use the Add and RemoveAt methods to programmatically
' remove the third level menu item style and replace
' it with a new style, in this case replacing the green background
' and yellow text with the blue background and white text.
Dim newStyle As New MenuItemStyle()
newStyle.BackColor = System.Drawing.Color.Blue
newStyle.ForeColor = System.Drawing.Color.White
' Remove the last of the three menu item styles. Note that
' since the collection has a zero-based index, the third
' entry has an index value of 2.
MainMenuID.LevelMenuItemStyles.RemoveAt(2)
MainMenuID.LevelMenuItemStyles.Add(newStyle)
End If
End Sub 'Page_Load
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItemStyleCollection Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItemStyleCollection Example</h3>
<!--Add MenuItemStyle objects to the MenuItemStyleCollection -->
<!--using LevelMenuItemStyles. -->
<!--Note that each menu item style represents a level in the menu -->
<asp:Menu id="MainMenuID"
Font-Names= "Arial"
ForeColor="Blue"
runat="server">
<LevelMenuItemStyles>
<asp:MenuItemStyle BackColor="Azure"
Font-Italic="true"
Font-Names="Arial"
ForeColor="Black" />
<asp:MenuItemStyle BackColor="Black"
Font-Italic="false"
Font-Names="Arial"
ForeColor="White" />
<asp:MenuItemStyle BackColor="Green"
Font-Italic="true"
Font-Names="Arial"
ForeColor="Yellow" />
</LevelMenuItemStyles>
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:Menu>
</form>
</body>
</html>
Remarks
The MenuItemStyleCollection class is used to store and manage a collection of MenuItemStyle objects in a Menu control. The Menu control uses the MenuItemStyleCollection class as the underlying data type of the LevelMenuItemStyles and LevelSelectedStyles properties.
The LevelMenuItemStyles and LevelSelectedStyles properties are an alternative to the individual style properties (such as StaticMenuItemStyle). These properties are applied to regular menu items and the selected menu item, respectively, based on the menu item's level in the menu. The first style in the collection corresponds to the menu item style for the first level of the menu. The second style in the collection corresponds to the menu item style for the second level of the menu, and so on. The LevelMenuItemStyles and LevelSelectedStyles properties are most often used to generate menus where menu items at a certain level have the same appearance, regardless of whether they have submenus.
The MenuItemStyleCollection class inherits most of its members from the StateManagedCollection class. For more information on the inherited members, see StateManagedCollection.
Properties
| Count |
Gets the number of elements contained in the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| Item[Int32] |
Gets the MenuItemStyle object at the specified index from the collection. |
Methods
| Add(MenuItemStyle) |
Appends the specified MenuItemStyle object to the end of the current collection. |
| Clear() |
Removes all items from the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| Contains(MenuItemStyle) |
Determines whether the specified MenuItemStyle object is in the collection. |
| CopyTo(Array, Int32) |
Copies the elements of the StateManagedCollection collection to an array, starting at a particular array index. (Inherited from StateManagedCollection) |
| CopyTo(MenuItemStyle[], Int32) |
Copies all the items from the MenuItemStyleCollection object to a compatible one-dimensional array of MenuItemStyle objects, starting at the specified index in the target array. |
| CreateKnownType(Int32) |
When overridden in a derived class, creates an instance of a class that implements IStateManager. The type of object created is based on the specified member of the collection returned by the GetKnownTypes() method. (Inherited from StateManagedCollection) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetEnumerator() |
Returns an iterator that iterates through the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetKnownTypes() |
When overridden in a derived class, gets an array of IStateManager types that the StateManagedCollection collection can contain. (Inherited from StateManagedCollection) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IndexOf(MenuItemStyle) |
Determines the index of the specified MenuItemStyle object in the collection. |
| Insert(Int32, MenuItemStyle) |
Inserts the specified MenuItemStyle object into the collection at the specified index location. |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| OnClear() |
When overridden in a derived class, performs additional work before the Clear() method removes all items from the collection. (Inherited from StateManagedCollection) |
| OnClearComplete() |
When overridden in a derived class, performs additional work after the Clear() method finishes removing all items from the collection. (Inherited from StateManagedCollection) |
| OnInsert(Int32, Object) |
When overridden in a derived class, performs additional work before the IList.Insert(Int32, Object) or IList.Add(Object) method adds an item to the collection. (Inherited from StateManagedCollection) |
| OnInsertComplete(Int32, Object) |
When overridden in a derived class, performs additional work after the IList.Insert(Int32, Object) or IList.Add(Object) method adds an item to the collection. (Inherited from StateManagedCollection) |
| OnRemove(Int32, Object) |
When overridden in a derived class, performs additional work before the IList.Remove(Object) or IList.RemoveAt(Int32) method removes the specified item from the collection. (Inherited from StateManagedCollection) |
| OnRemoveComplete(Int32, Object) |
When overridden in a derived class, performs additional work after the IList.Remove(Object) or IList.RemoveAt(Int32) method removes the specified item from the collection. (Inherited from StateManagedCollection) |
| OnValidate(Object) |
When overridden in a derived class, validates an element of the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| Remove(MenuItemStyle) |
Removes the specified MenuItemStyle object from the collection. |
| RemoveAt(Int32) |
Removes the MenuItemStyle object at the specified index location from the collection. |
| SetDirty() |
Forces the entire StateManagedCollection collection to be serialized into view state. (Inherited from StateManagedCollection) |
| SetDirtyObject(Object) |
When overridden in a derived class, instructs an |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Explicit Interface Implementations
| ICollection.Count |
Gets the number of elements contained in the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| ICollection.IsSynchronized |
Gets a value indicating whether the StateManagedCollection collection is synchronized (thread safe). This method returns |
| ICollection.SyncRoot |
Gets an object that can be used to synchronize access to the StateManagedCollection collection. This method returns |
| IEnumerable.GetEnumerator() |
Returns an iterator that iterates through the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| IList.Add(Object) |
Adds an item to the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| IList.Clear() |
Removes all items from the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| IList.Contains(Object) |
Determines whether the StateManagedCollection collection contains a specific value. (Inherited from StateManagedCollection) |
| IList.IndexOf(Object) |
Determines the index of a specified item in the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| IList.Insert(Int32, Object) |
Inserts an item into the StateManagedCollection collection at the specified index. (Inherited from StateManagedCollection) |
| IList.IsFixedSize |
Gets a value indicating whether the StateManagedCollection collection has a fixed size. This method returns |
| IList.IsReadOnly |
Gets a value indicating whether the StateManagedCollection collection is read-only. (Inherited from StateManagedCollection) |
| IList.Item[Int32] |
Gets the IStateManager element at the specified index. (Inherited from StateManagedCollection) |
| IList.Remove(Object) |
Removes the first occurrence of the specified object from the StateManagedCollection collection. (Inherited from StateManagedCollection) |
| IList.RemoveAt(Int32) |
Removes the IStateManager element at the specified index. (Inherited from StateManagedCollection) |
| IStateManager.IsTrackingViewState |
Gets a value indicating whether the StateManagedCollection collection is saving changes to its view state. (Inherited from StateManagedCollection) |
| IStateManager.LoadViewState(Object) |
Restores the previously saved view state of the StateManagedCollection collection and the IStateManager items it contains. (Inherited from StateManagedCollection) |
| IStateManager.SaveViewState() |
Saves the changes to the StateManagedCollection collection and each IStateManager object it contains since the time the page was posted back to the server. (Inherited from StateManagedCollection) |
| IStateManager.TrackViewState() |
Causes the StateManagedCollection collection and each of the IStateManager objects it contains to track changes to their view state so they can be persisted across requests for the same page. (Inherited from StateManagedCollection) |
Extension Methods
| Cast<TResult>(IEnumerable) |
Casts the elements of an IEnumerable to the specified type. |
| OfType<TResult>(IEnumerable) |
Filters the elements of an IEnumerable based on a specified type. |
| AsParallel(IEnumerable) |
Enables parallelization of a query. |
| AsQueryable(IEnumerable) |
Converts an IEnumerable to an IQueryable. |
