Ian Haynes, ASP.Net in Expression Web MVP, has a top tip about validation controls. Validation on a drop down list At first glance it looks as though there is no way of adding the normal validation to a drop down list to indicate that a values needs to be selected. In fact it's very simple. Add a list item 'Select', set it as 'selected' and put it's value = "" Then add a RequiredFieldValidator to the drop list control. As no value is given for the 'Select' option, the validator triggers and your error message is shown.
Sharing the unusual problems and solutions while developing applications using .Net. and AWS