How to validate DropdownList in asp.net c# video tutorials part-23

In this asp.net c# video tutorial we will learn how to use dropdownlist with validation. The default index is set 0 of the Dropdownlist. We all know that first index , i mean to say 0 index contain basic message for users like select or choose. If you want to put some validation rules on dropdownlist then apply it on first index. If you select Required field validator from toolbox then set Initial value of Required Field validator. See this video and get more information, which is related to article.