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ControlCollection.Contains Method
.NET Framework 1.1
Determines whether the specified server control is in the parent server control's ControlCollection object.
[Visual Basic] Public Overridable Function Contains( _ ByVal c As Control _ ) As Boolean [C#] public virtual bool Contains( Control c ); [C++] public: virtual bool Contains( Control* c ); [JScript] public function Contains( c : Control ) : Boolean;
Parameters
- c
- The server control to search for in the collection.
Return Value
true if the specified server control exists in the collection; otherwise, false.
Example
[Visual Basic, C#] The following example uses the System.Web.UI.Contains method to determine whether a Radio3 server control exists in the ControlCollection object for a myForm control, and, if it is, removes it.
[Visual Basic] ' Create an event handler that uses the ' ControlCollection.Contains method to verify ' the existence of a Radio3 server control in ' the ControlCollection of the myForm server control. ' When a user clicks the button associated ' with this event handler, Radio3 is removed ' from the collection. Sub RemoveBtn_Click(sender As [Object], e As EventArgs) If myForm.Controls.Contains(Radio3) Then myForm.Controls.Remove(Radio3) End If End Sub 'RemoveBtn_Click [C#] // Create an event handler that uses the // ControlCollection.Contains method to verify // the existence of a Radio3 server control in // the ControlCollection of the myForm server control. // When a user clicks the button associated // with this event handler, Radio3 is removed // from the collection. void RemoveBtn_Click(Object sender, EventArgs e){ if (myForm.Controls.Contains(Radio3)) { myForm.Controls.Remove(Radio3); } }
[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family
See Also
ControlCollection Class | ControlCollection Members | System.Web.UI Namespace | Controls
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