ShapeCollection.GetChildIndex Method (Shape, Boolean)

Retrieves the index of the specified Shape in the ShapeCollection, and optionally raises an exception if the specified Shape is not in the ShapeCollection.

Namespace:  Microsoft.VisualBasic.PowerPacks
Assembly:  Microsoft.VisualBasic.PowerPacks.Vs (in Microsoft.VisualBasic.PowerPacks.Vs.dll)

Syntax

'Declaration
Public Function GetChildIndex ( _
    child As Shape, _
    throwException As Boolean _
) As Integer

public int GetChildIndex(
    Shape child,
    bool throwException
)

public:
int GetChildIndex(
    Shape^ child, 
    bool throwException
)

member GetChildIndex : 
        child:Shape * 
        throwException:bool -> int

public function GetChildIndex(
    child : Shape, 
    throwException : boolean
) : int

Parameters

• child
  Type: Microsoft.VisualBasic.PowerPacks.Shape

  The Shape to search for in the ShapeCollection.

• throwException
  Type: System.Boolean

  true to throw an exception if the Shape specified in the child parameter is not a control in the ShapeCollection; otherwise, false.

Return Value

Type: System.Int32
A zero-based index value that represents the location of the specified Shape in the ShapeCollection. Or -1 if the specified Shape is not found in the ShapeCollection.

Exceptions

Exception	Condition
ArgumentException	The child shape is not in the ShapeCollection and the throwException parameter value is true.

Remarks

The index represents the order in which the shapes were added to the collection. If shapes are removed from the collection, the indexes of the shapes are reassigned.

A return value of -1 is returned only when the throwException parameter is false.

Examples

The following code example demonstrates how to use the GetChildIndex method to retrieve the location of a Shape in a ShapeCollection. This example requires that you have at least two OvalShape controls on a form.

Private Sub OvalShape1_Click() Handles OvalShape1.Click
    Dim i As Integer 
    ' Find the index for OvalShape1.
    i = OvalShape1.Parent.Shapes.GetChildIndex(OvalShape2, False)
    ' If the shape is not in the collection, display a message. 
    If i = -1 Then
        MsgBox("OvalShape2 is not in this collection.")
    Else
        MsgBox("The index for OvalShape2 is " & CStr(i))
    End If 
End Sub

private void ovalShape1_Click(System.Object sender, System.EventArgs e)
{
    int i;
    // Find the index for OvalShape1.
    i = ovalShape1.Parent.Shapes.GetChildIndex(ovalShape2, false);
    // If the shape is not in the collection, display a message. 
    if (i==-1)
    {
        MessageBox.Show("ovalShape2 is not in this collection.");
    }
    else
    {
        String index;
        index = i.ToString();
        MessageBox.Show("The index for ovalShape2 is " + index);
    }
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

ShapeCollection Class

GetChildIndex Overload

Microsoft.VisualBasic.PowerPacks Namespace

IndexOf

Other Resources

Introduction to the Line and Shape Controls (Visual Studio)

How to: Draw Lines with the LineShape Control (Visual Studio)

How to: Draw Shapes with the OvalShape and RectangleShape Controls (Visual Studio)