RadioButton.CheckedChanged Event (System.Windows.Forms)

CheckedChanged Event

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

RadioButton..::.CheckedChanged Event

Occurs when the value of the Checked property changes.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)

Syntax

Visual Basic (Declaration)

Public Event CheckedChanged As EventHandler

Visual Basic (Usage)

Dim instance As RadioButton
Dim handler As EventHandler

AddHandler instance.CheckedChanged, handler

public event EventHandler CheckedChanged

Visual C++

public:
 event EventHandler^ CheckedChanged {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}

JScript

JScript does not support events.

Remarks

For more information about handling events, see Consuming Events.

Topic	Location
How to: Respond to a User Selection in a RadioButton Web Server Control Group	Building ASP .NET Web Applications
How to: Respond to a User Selection in a RadioButton Web Server Control Group	Building ASP .NET Web Applications
How to: Respond to a User Selection in a RadioButton Web Server Control Group	Building ASP .NET Web Applications in Visual Studio
How to: Respond to a User Selection in a RadioButton Web Server Control Group	Building ASP .NET Web Applications in Visual Studio

Examples

The following code example demonstrates how the CheckAlign property can be changed at run time. The check box portion of a RadioButton is moved to the right or left of the text when the Checked value changes. This example requires that a RadioButton control has been instantiated on a form and that a reference to the System.Drawing namespace has been included.

Visual Basic

Private Sub radioButton1_CheckedChanged(sender As Object, e As EventArgs)
    ' Change the check box position to be opposite its current position.
    If radioButton1.CheckAlign = ContentAlignment.MiddleLeft Then
        radioButton1.CheckAlign = ContentAlignment.MiddleRight
    Else
        radioButton1.CheckAlign = ContentAlignment.MiddleLeft
    End If
End Sub

private void radioButton1_CheckedChanged(Object sender, 
                                         EventArgs e)
{
   // Change the check box position to be opposite its current position.
   if (radioButton1.CheckAlign == ContentAlignment.MiddleLeft)
   {
      radioButton1.CheckAlign = ContentAlignment.MiddleRight;
   }
   else
   {
      radioButton1.CheckAlign = ContentAlignment.MiddleLeft;
   }
}

Visual C++

private:
   Void radioButton1_CheckedChanged( System::Object^ sender,
      System::EventArgs^ e )
   {
      // Change the check box position to be opposite its current position.
      if ( radioButton1->CheckAlign == ContentAlignment::MiddleLeft )
      {
         radioButton1->CheckAlign = ContentAlignment::MiddleRight;
      }
      else
      {
         radioButton1->CheckAlign = ContentAlignment::MiddleLeft;
      }
   }

Platforms

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, Windows CE, Windows Mobile for Pocket PC

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.

Version Information

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

Reference

RadioButton Class

RadioButton Members

System.Windows.Forms Namespace

Checked

OnCheckedChanged