Reset RadRadioButtonList state

How to

Deselect RadRadioButtonList with server or client-side code

 

Solution

• Client-side Solution

You can get reference to all radio list items via the get_items() method and use the set_selected(false); method to reset their state. Note that this will reset it only on the client-side and transferring this reset to the server is not a feature available in the control. You can hack the control into thinking nothing is selected by resetting its _selectedIndex property to -1 and making it updateClientState().

ASPX

<telerik:RadRadioButtonList ID="RadRadioButtonList1" runat="server" RepeatDirection="Horizontal">
   <Items>
       <telerik:ButtonListItem Text="Yes" Selected="true" Value="Yes"></telerik:ButtonListItem>
       <telerik:ButtonListItem Text="No" Value="No"></telerik:ButtonListItem>
   </Items>
</telerik:RadRadioButtonList>
<asp:Button Text="Reset Radio List" OnClientClick="resetRadioList(); return false;" runat="server" />
<script type="text/javascript">
   function resetRadioList() {
       var radioButtonList = $find("<%=RadRadioButtonList1.ClientID%>");
       //reset the appearane of the items
       var items = radioButtonList.get_items();
       for (var i = 0; i < items.length; i++) {
           items[i].set_selected(false);
       }
       //transfer the no-items-selected state to the server code
       radioButtonList._selectedIndex = -1;
       radioButtonList.updateClientState();
   }
</script> 

• Server-side Solution

To reset the state via the code-behind use the Items collection and Selected property of the component:

ASPX

<telerik:RadRadioButtonList ID="RadRadioButtonList1" runat="server" RepeatDirection="Horizontal">
   <Items>
       <telerik:ButtonListItem Text="Yes" Selected="true"  Value="Yes"></telerik:ButtonListItem>
       <telerik:ButtonListItem Text="No" Value="No"></telerik:ButtonListItem>
   </Items>
</telerik:RadRadioButtonList>
<asp:Button Text="Reset Radio List" OnClick="Reset_RadioList_Click" runat="server" />

C#

protected void Reset_RadioList_Click(object sender, EventArgs e)
{
     for (int i = 0; i < RadRadioButtonList1.Items.Count; i++)
     {
        RadRadioButtonList1.Items[i].Selected = false;
     }
}

VB

Protected Sub Reset_RadioList_Click(ByVal sender As Object, ByVal e As EventArgs)
    For i As Integer = 0 To RadRadioButtonList1.Items.Count - 1
        RadRadioButtonList1.Items(i).Selected = False
    Next
End Sub