or
<telerik:RadComboBox ID="cmboTest" runat="server" AllowCustomText="true" CheckBoxes="true" ShowDropDownOnTextboxClick="false" Skin="Outlook" Width="520" Height="250" MarkFirstMatch="False" NoWrap="true" OffsetX="-2" OffsetY="-2"></telerik:RadComboBox>


<ClientSettings> <DataBinding Location="https://locallhost/LoadWidgetsAsync.aspx" ResponseType="JSON"> <DataService TableName="Table1" /> </DataBinding> </ClientSettings>