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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
)

Parameters

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))
    { 
       myForm.Controls.Remove(Radio3);
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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