Validating forms in asp

24-Jan-2020 16:54

With an added advantage that if the client disabled JS the form is still submitted on the server.

The cancel button has a Causes Validation property. As we mentioned in the beginning of the article, validation can occur twice: once on the client’s machine and once on the server. Client side validation provides quick feedback for the user.This Required Field Validator forces the user to enter text into the control associated with the validator. If you want to make sure the user changes a default value placed into the control, set the control’s Text value and the Initial Value property of the Required Field Validator to the same value.The associated control is set by right clicking on the validator and selecting Properties from the context menu. The rest of the validation controls provided by ASP.It validates input and display appropriate message to the user.

Output: To see the output, right click on the Index.cshtml file and select view in browser. As we can see that it validates form fields and display error message to the user.

In the below screenshot, we are validating that the entered data is as expected.

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