Getting Started

The following tutorial demonstrates how to set up a page with a RadSwitch control and use its OnCheckedChanged server event:

1. In the default page of a new ASP.NET AJAX-enabled Web Application add a RadSwitch control:

   ASP.NET

   <telerik:RadSwitch ID="RadSwitch1" runat="server">
   </telerik:RadSwitch>
   

2. Set the Text of the RadSwitch Toggle states (unless you want them empty)

   ASP.NET

   <telerik:RadSwitch runat="server" ID="RadSwitch1" Value="0" CommandArgument="arg1">
       <ToggleStates>
           <ToggleStateOff Text="No" />
           <ToggleStateOn Text="Yes" />
       </ToggleStates>
   </telerik:RadSwitch>
   

3. Add a Label to show a text associated with RadSwitch

   ASP.NET

   <telerik:RadLabel ID="switchLabel" runat="server" AssociatedControlID="RadSwitch1" Text="I agree to the Terms & Conditions."></telerik:RadLabel>
   

4. To hook to the OnCheckedChanged server-side event of RadSwitch add an attribute to the main control tag and add the method signature:

   ASP.NET

   <telerik:RadSwitch runat="server" ID="RadSwitch1" Value="0" CommandArgument="arg1" OnCheckedChanged="RadSwitch1_CheckedChanged">
       <ToggleStates>
           <ToggleStateOff Text="No" />
           <ToggleStateOn Text="Yes" />
       </ToggleStates>
   </telerik:RadSwitch>
   

   C#

   protected void RadSwitch1_CheckedChanged(object sender, EventArgs e)
   {
   
   }
   

   VB

   Protected Sub RadSwitch1_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
   End Sub
   

5. Add a Label control to write the information to:

   ASP.NET

   <telerik:RadLabel ID="Label1" runat="server"></telerik:RadLabel>
   

6. Use the CheckedChanged event handler to write information about the switch properties:

   C#

   protected void RadSwitch1_CheckedChanged(object sender, EventArgs e)
   {
       var switchObj = sender as RadSwitch;
       var currentText = (bool)switchObj.Checked ? switchObj.ToggleStates.ToggleStateOn.Text : switchObj.ToggleStates.ToggleStateOff.Text;
       string data = string.Format("current text: {0}, current value {1}, current command argument: {2}, checked: {3}",
   
                                   currentText, switchObj.Value, switchObj.CommandArgument, switchObj.Checked);
       Label1.Text = data;
   }
   

   VB

   Protected Sub RadSwitch1_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
       Dim switchObj = TryCast(sender, RadSwitch)
       Dim currentText = If(CBool(switchObj.Checked), switchObj.ToggleStates.ToggleStateOn.Text, switchObj.ToggleStates.ToggleStateOff.Text)
       Dim data As String = String.Format("current text: {0}, current value {1}, current command argument: {2}, checked: {3}", currentText, switchObj.Value, switchObj.CommandArgument, switchObj.Checked)
       Label1.Text = data
   End Sub
   

See Also

• Properties and Events