[Solved] RadComboBox EmptyMessage

[Peter]

Hi

A message defined in EmptyMessage property doesn't show if the list is not empty.

How can I define a "Please select ..." type of message ?

I don't want to enable LoadOnDemand.

I also tried to add a "Please select ..." text with an emtpy string key within the OnDataBound event handler to the list,
but the problem with this was that the RequiredFieldValidator control did not handle this properly.

Thanks.

[Shinu]

Hello Peter,

The EmptyMessage property can be used when the AllowCustomText property is set to True. One suggestion to show EmptyMessage and prevent the user from entering text is cancel the key pressed, from client side as shown below.

ASPX:

<telerik:radcombobox id="RadComboBox1" runat="server" allowcustomtext="True" emptymessage="Please select one...">
    <Items>
        <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem1" Value="RadComboBoxItem1"></telerik:RadComboBoxItem>
        <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem2" Value="RadComboBoxItem2"></telerik:RadComboBoxItem>
    </Items>
</telerik:radcombobox>

JavaScript:

<script type="text/javascript">
function pageLoad()
{
   var combo = $find("<%= RadComboBox1.ClientID %>");
   var input = combo.get_inputDomElement();
   input.onkeydown = onKeyDownHandler;
}
function onKeyDownHandler(e)
{
   if (!e)
       e = window.event;
   e.returnValue = false;
   if (e.preventDefault)
   {
       e.preventDefault();
   }
}
</script>

Thanks,
Shinu.