Now we will see how to validate the ASP.NET DropDownList control. Basically, we may require to validate that the user has selected some option in the DropDownList! Check the below code snippet on how to do it!
Finally, we will see how to validate ASP.NET Checkboxlist! We have a bunch of options displayed as checkbox, which we we may have to validate that user selects at least one checkbox! Check the below code on how do it!
Now, we will see how to validate the ASP.NET File Upload control! Suppose you may have to allow users to select certain file types. Check the below code on how to do it!
Happy Web Programming!!!