Edit this page

Getting Started

The following help article demonstrates how to set up a page with a RadCheckBoxList control and use its OnSelectedIndexChanged server event:

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

    ASP.NET

    <telerik:RadCheckBoxList ID="RadCheckBoxList1" runat="server">
    </telerik:RadCheckBoxList>
    
  2. Add two CheckBoxListItem objects to the Items collection and set the appropriate values for Text and Selected properties of each item:

    ASP.NET

    <telerik:RadCheckBoxList ID="RadCheckBoxList1" runat="server">
        <Items>
            <telerik:CheckBoxListItem Text="Accept" Value="0" Selected="true" />
            <telerik:CheckBoxListItem Text="Decline" Value="1" />
        </Items>
    </telerik:RadCheckBoxList>
    
  3. To hook to the OnSelectedIndexChanged server-side event of RadCheckBoxList, add an attribute to the main control tag and add the method signature:

    ASP.NET

    <telerik:RadCheckBoxList ID="RadCheckBoxList1" runat="server" OnSelectedIndexChanged="RadCheckBoxList1_SelectedIndexChanged">
        <Items>
            <telerik:CheckBoxListItem Text="Accept" Value="0" Selected="true" />
            <telerik:CheckBoxListItem Text="Decline" Value="1" />
        </Items>
    </telerik:RadCheckBoxList>
    

    C#

    protected void RadCheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
    {
    
    }
    

    VB.NET

    Protected Sub RadCheckBoxList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
    End Sub
    
  4. Add a Label control to write the information to:

    ASP.NET

    <asp:Label ID="Label1" Text="" runat="server" />
    
  5. Use the OnSelectedIndexChanged event handler to write information about the properties of the SelectedItem of the RadCheckBoxList:

    C#

    protected void RadCheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        RadCheckBoxList checkboxlist = sender as RadCheckBoxList;
    
    
        string data = string.Format("selected index: {0}, selected value {1}, selected text: {2}",
                                    checkboxlist.SelectedIndex, checkboxlist.SelectedValue, checkboxlist.SelectedItem.Text);
        Label1.Text = data;
    }
    

    VB.NET

    Protected Sub RadCheckBoxList1_SelectedIndexChanged(sender As Object, e As EventArgs)
        Dim checkboxlist As RadCheckBoxList = TryCast(sender, RadCheckBoxList)
    
    
        Dim data As String = String.Format("selected index: {0}, selected value {1}, selected text: {2}", checkboxlist.SelectedIndex, checkboxlist.SelectedValue, checkboxlist.SelectedItem.Text)
        Label1.Text = data
    End Sub
    

See Also