ControlCollection.Contains Method (System.Web.UI)

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.NET Framework Class Library
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)
Syntax
Visual Basic
Public Overridable Function Contains ( _
	c As Control _
) As Boolean
C#
public virtual bool Contains(
	Control c
)
Visual C++
public:
virtual bool Contains(
	Control^ c
)
F#
abstract Contains : 
        c:Control -> bool 
override Contains : 
        c:Control -> bool

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.
Examples
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);
    }
}
Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0
Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
See Also

Reference

ControlCollection Class
System.Web.UI Namespace
Controls