ASP .NET MVC Ajax Request Internal server Error?

Question

just trying to learn ajax on asp.net mvc,but dont know whats wrong with it?

my controller class method=>

 [HttpPost] public JsonResult Getdata(string batchcode) { ///var studentid = db.Studentassignbatches.Where(x => x.batch_code == batchcode).Select(x => new Studentassignbatche { UserId = x.UserId }).ToList(); return Json("hi",JsonRequestBehavior.DenyGet); }

and my view and ajax request>

<select onchange="ShowBatchCode()" id="BatchList" class="form-control input-lg"> <option class="pull-left" value="CCNA Security-1">CCNA Security-1</option> <option class="pull-left" value="CCNA Security-2">CCNA Security-2</option> <option class="pull-left" value="JNCSP-SEC-1">JNCSP-SEC-1</option> <option class="pull-left" value="Oracle Database 12c-1">Oracle Database 12c-1</option> </select>

and ajax=>

<script type="text/javascript"> function ShowBatchCode() { var batchcode = $('#BatchList').val(); $.ajax({ type: 'POST', dataType: 'json', contentType: 'application/json', url: 'Getdata', data: { batchcode: batchcode }, success: function (data) { alert(data); }, error: function (result) { alert('Something Went Wrong!'); } }); }

and it always show me a alert "Something Went Wrong!".so i debug my web page and i found=>

505 Internal server Error.i dont know how to solve it.and try to remove [Httppost] and also try use

 data: batchcode,

but nothing works for me.help me please?anybody!!!!!

contentType: 'application/json', , you need change data to json — Asif Raza
– Asif Raza, Commented May 7, 2017 at 14:37
Try giving controller name if name is YourController then then url should be 'Your/Getdata' — User3250
– User3250, Commented May 7, 2017 at 14:57

Darin Dimitrov · Accepted Answer · 2017-05-07 14:37:23Z

2

You have indicated:

contentType: 'application/json',

but you sent application/x-www-form-urlencoded here:

data: { batchcode: batchcode },

So either get rid of the contentType: 'application/json' line or make sure that you are sending JSON to the server:

data: JSON.stringify({ batchcode: batchcode }),

answered May 7, 2017 at 14:37

Darin Dimitrov

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6 Comments

nayan chowdhury Over a year ago

Not Working For ME!

Darin Dimitrov Over a year ago

What is the exact response body from the server? You can see it from the developer toolbar in your browser.

Darin Dimitrov Over a year ago

That's not the response body sent from the server. Could you please show the exact HTML returned by the server as a response to the AJAX call? Just click on the AJAX call in your developer toolbar and look at the response tab.

nayan chowdhury Over a year ago

hope this will help you?

Darin Dimitrov Over a year ago

OK, you are getting 404 Not Found. So it looks like your url parameter is wrong. Try specifying the correct url to your controller action.

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