RequiredFieldValidator control example

The RequiredFieldValidator is actually very simple, and yet very useful. You can use it to make sure that the user has entered something in a TextBox control. Let's give it a try, and add a RequiredFieldValidator to our page. We will also add a TextBox to validate, as well as a button to submit the form with.

 .........................Designing code forRequiredFieldValidator..
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..........................design code for textbox..................
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.....................................................................................design code for button.............................
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