Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Contains Method

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))

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
© 2015 Microsoft