You are designing an ASP.NET MVC 2 Web application that requires each user to register a user name and password before accessing restricted content. You have the following requirements for user registration:

When the focus leaves the user name input field, validate that the

user name does not already exist.

Display validation results before submitting the form.

You need to recommend a data validation strategy. What should you recommend?

Question

You are designing an ASP.NET MVC 2 Web application that requires each user to register a user name and password before accessing restricted content. You have the following requirements for user registration:

When the focus leaves the user name input field, validate that the

user name does not already exist.

Display validation results before submitting the form.

You need to recommend a data validation strategy. What should you recommend?

Accepted Answer

D. Use jQuery to access server-side validation code.

Answer

A. Use the Required attribute to annotate the user name property of the model.

Answer

B. Use an UpdatePanel control to access server-side validation.

Answer

C. Implement the IValidator interface on the model.

You are designing an ASP.NET MVC 2 Web application that requires each user to register a user name and password before accessing restricted content. You have the following requirements for user…

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