CODEWITHSUNDEEP
ajaxasp.net-mvc-3jquery
DavidJones
DavidJones

Reputation: 252

Determining whether MVC3 server validation is successful

When returning from an AJAX query, is there a way to determine whether the server side validation added any errors?

I have tried 

if ($('#MyForm').valid() == true)
...

in an OnSuccess function, but it seems to always be true, regardless of whether the server side validation failed or not. The refreshed HTML if generates does put in the error as expected, so I know the validation is working correctly.

I suspect the valid() method is just re-running the client-side validation.

Upvotes: 3

Views: 292

Answers (2)

robasta
robasta

Reputation: 4701

Check out the technique in this tutorial. Validation is done server side using Data annotations. Using a custom filter, validation errors are sent to the client and on the client side, you call revalidate() from the unbotrusive js

$.validator.unobtrusive.revalidate(form, validationResult);

Upvotes: 1

Iridio
Iridio

Reputation: 9271

If you run an ajax call to the server, you can simply compose the Json return.

Usually I wrap my responses in a class containing a property that tell me if all is ok, one that contain the data and one with the eventual error message.

public class MyJsonReposnse
{
   public bool Valid {get;set;}
   public string Error {get;set;}
   public IList<MyClass> Data {get;set;}
}

Then from your controller you return the json and from your onSuccess of the jQuery call, you check the value of Valid and act accordingly

Upvotes: 2

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