Delete using Ajax Call in .NET MVC

Mark Tabor

6y10.4k.NET

I am calling Delete controller method from ajax on button click but when i click the button it gives error like "Object reference not set to an instance of an object."

I have write a code for the ajax and calling delete method previously the javascript code get called on every page load rather than on button click but then i add e.preventDefault(); The issue is now it is giving error rather then moving to the controller delete method.

My Javascript code

[httppost]
public ActionResult Delete(int? id) { if (id == null)
{ return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } S
tudent_Experience student_Experience = db.Student_Experience.Find(id);
if (student_Experience == null) { return HttpNotFound(); }
// Student_Experience student_Experience = db.Student_Experience.Find(id);
db.Student_Experience.Remove(student_Experience);
db.SaveChanges(); return RedirectToAction("Create","Students"); // return View(student_Experience); }

4 Replies

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Jaimin Shethiya6y ago
Hello,

can you please update your javascript code same as the below and after check it worked or not.

Thanks
Salman Beg6y ago
So I think you are getting some issue in client side. So in your browser press F12 or open inspect element and there you can check if there is any error. If anything exists then you need to resolve. Thanks.
Mark Tabor6y ago
it is not moving to my controller so how to debug it ?
Salman Beg6y ago
Hi. The message "Object not set to instance of Object" means that you are trying to use an object which has not been initialized. That is, you either set it to null, or you never set it to anything at all. The reference is not initialized (or it was initialized, but is no longer initialized). So you can put breakpoint in code and check where exactly it is coming null, after that you can rectify it. Thanks.