Validating textboxes in asp net
If the clientside validation is not working, the invalid form will be catched by our piece of code in the Code Behind file, as shown with the Required Field Validator.
This article discusses how to validate information you get from users — that is, to make sure that users enter valid information in HTML forms in an ASP. What you'll learn: If you ask users to enter information in a page — for example, into a form — it's important to make sure that the values that they enter are valid.
The Compare Validator might not be the most commonly used validator of the bunch, but it's still useful in some cases.This is a good source of info Startv20/aspnet/doc/validation/second option is to find all textboxes and display the message Required field validators would work great.However, if you prefer a j Query solution you could try something like this.Also, there's a large variety of j Query validation plugins that would helpful.By implementing directly the IValidator interface you lose the possibility of partitioning validation in different validation groups, because the Validation Group property is not a member of IValidator interface, but of the Base Validator class (the standard class implementing IValidator interface provided by . button with a validation group property set) the framework tries to get all Validators which have the same validation group of the button which has generated the postback. NET framework code tries to cast all elements of Page.