How to display error on the client when using ASP.NET MVC AJAX

Question

I am using ASP.NET MVC AJAX with the @AJAX.ActionLink helper to implement item deletion from a grid. When the request is executed it returns the grid without the deleted item and the AJAX helpers replace the grid. This works just fine but the problem is what to do if the item cannot be deleted (in my case due to foreign key constraints). How can I report the error to the client and display appropriate message. I don't want to use the OnFailure function blindly because I don't want to show the same error message for all errors. Ideally there will be a way to send specific error from the action and inspect the error in the JavaScript OnFailure function but I can't seem to find it.

Of course I can downgrade to returning JSON, manually executing AJAX calls and replacing UI elements but I don't really feel like it. I'd rather do something dirty like render a hidden input with the error information and check for it on the client but I don't want to do that either if there is better way.

Community · Accepted Answer · 2017-05-23 12:30:06Z

2

You can return status code and error message from the controller and pass it to the ajax OnFailure function

return new HttpStatusCodeResult(HttpStatusCode.Conflict, "The entity is currently used");

as shown here: ASP.NET MVC AJAX onError handling

and in the client side JS:

function deleteFailure(responce) {
    var statusCode = responce.status;
    var responceText = responce.statusText;
    if(statusCode == 409){
        //do something specific for specific errors
    }
    alert(responceText);
}

edited May 23, 2017 at 12:30

CommunityBot

11 silver badge

answered Mar 20, 2014 at 14:54

dtrouble

363 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to display error on the client when using ASP.NET MVC AJAX

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related