ShapeCollection.ContainsKey Method

Determines whether the ShapeCollection contains an item with the specified key.

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

Syntax

'Declaration
Public Function ContainsKey ( _
    key As String _
) As Boolean

public bool ContainsKey(
    string key
)

public:
bool ContainsKey(
    String^ key
)

member ContainsKey : 
        key:string -> bool

public function ContainsKey(
    key : String
) : boolean

Parameters

• key
  Type: System.String

  The key to locate in the ShapeCollection.

Return Value

Type: System.Boolean
true if the ShapeCollection contains an item with the specified key; otherwise, false.

Remarks

The Name property of a Shape is the same as the key for a Shape in the ShapeCollection.

Examples

The following example demonstrates how to use the ContainsKey method to remove a Shape from a form if it is a member of the form's ShapeCollection. This example requires that you have at least two OvalShape controls on a form.

Private Sub Form1_Click() Handles Me.Click
    Dim canvas As ShapeContainer
    ' Get the ShapeContainer.
    canvas = OvalShape1.Parent
    ' If OvalShape2 is in the same collection, remove it. 
    If canvas.Shapes.ContainsKey("OvalShape2") Then
        canvas.Shapes.Remove(OvalShape2)
    End If 
End Sub

private void Form1_Click(object sender, System.EventArgs e)
{
    ShapeContainer canvas;
    // Get the ShapeContainer.
    canvas = ovalShape1.Parent;
    // If OvalShape2 is in the same collection, remove it. 
    if (canvas.Shapes.ContainsKey("ovalShape2"))
    {
        canvas.Shapes.Remove(ovalShape2);
    }
}

.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

Microsoft.VisualBasic.PowerPacks Namespace

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)