Hi,
Please have a look into the sample code snippet which works fine at my end.
ASPX:
<telerik:RadComboBox ID="RadComboBox1" runat="server" OnClientDropDownClosing="OnClientDropDownClosing" EmptyMessage="select
OnClientSelectedIndexChanging="OnClientSelectedIndexChanging1">
<Items>
<telerik:RadComboBoxItem Text="1" />
<telerik:RadComboBoxItem Text="2" />
<telerik:RadComboBoxItem Text="3" />
</Items>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" CssClass="check" />
<asp:Label ID="Label1" runat="server" Text="L1"></asp:Label>
</ItemTemplate>
</telerik:RadComboBox>
C#:
protected void Page_Load(object sender, EventArgs e)
{
foreach (RadComboBoxItem item in RadComboBox1.Items)
{
Label l1 = (Label)item.FindControl("Label1");
l1.Text = item.Text;
}
}
JavaScript:
<script type="text/javascript">
function OnClientDropDownClosing(sender, args) {
var flag = 0;
var combo = $find("<%= RadComboBox1.ClientID %>");
for (var i = 0; i < combo.get_items().get_count(); i++) {
var checkbox = combo.get_items().getItem(i).get_element().getElementsByTagName("input");
if (checkbox.item().checked == true) {
flag = 1;
break;
}
}
if (flag == 0)
sender.set_text(" ");
}
function OnClientSelectedIndexChanging1(sender, args) {
args.set_cancel(true);
}
</script>
Thanks,
Shinu.