<com:TContent ID="Content"> <com:TActiveDropDownList id="addl" OnSelectedIndexChanged="SelectItem" ValidationGroup="Test1"> <com:TListItem Value="1" Text="Test 1"/> <com:TListItem Value="2" Text="Test 2"/> <com:TListItem Value="3" Text="Test 3"/> </com:TActiveDropDownList> <com:TActiveCustomValidator ControlToValidate="addl" ValidationGroup="Test1" OnServerValidate="validateSelection" Display="Dynamic" ErrorMessage="Please Select Test 3"/> <com:TActiveLinkButton Text="Submit" OnClick="submit" ValidationGroup="Test1" /> <com:TActiveLabel id="lblResult"/> <br/><br/> <com:TActiveTextBox ID="testTextBox" ValidationGroup="Test2" /> <com:TActiveCustomValidator ControlToValidate="testTextBox" ValidationGroup="Test2" OnServerValidate="validateTextBox" ErrorMessage="Please enter 'Prado' !" Display="Dynamic" /> <com:TActiveLinkButton Text="Validate" ValidationGroup="Test2" OnClick="submit2" /> <com:TActiveLabel id="lblResult2"/> </com:TContent>