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ControlCollection.Contains Method

Determines whether the specified server control is in the parent server control's ControlCollection object.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public virtual bool Contains(
	Control c


Type: System.Web.UI.Control

The server control to search for in the collection.

Return Value

Type: System.Boolean
true if the specified server control exists in the collection; otherwise, false.

// 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))

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0