Undefined result in ajax jquery

Question

my code is some thing like this , and in success result msg.d is undefined . i think it is related to formdata as value that is passed to jquery ajax . but i dont know can i resolve it .what is wrong with that ?!

  var files = event.originalEvent.dataTransfer.files;   // i get it in drop event 
  var data = new FormData();

  jQuery.each(files, function (i, file) {
    data.append('file-' + i, file);
  });

  $.ajax({
    type: "POST",
    url: parameters.Url,
    contentType: false,
    processData: false,
    data: data,
    success: function (msg) {        //my return value from webservice is just "hello"
      alert(msg.d);
    }
  });
 }

[WebMethod] public string HelloWorld() { return "Hello World"; } — peyman gilmour
– peyman gilmour, Commented Aug 20, 2012 at 9:34

Pradeeshnarayan · Accepted Answer · 2012-08-20 09:43:38Z

1

from your above comment can understand that, You are actually returning just a string from your server side. And in your client side you are trying to alert an argument 'd' from the ajax return. This d is not at all present.

and when you alert message you are getting message [object XMLDocument]. this XML element can change to string if you specify 'dataType: "text",' in your ajax call.

So please try like this.

  $.ajax({
    type: "POST",
    url: parameters.Url,
    data: data,
    dataType: "text",
    success: function (msg) {       
      alert(msg);
    }
  });

Hope this will work fine for you.

answered Aug 20, 2012 at 9:43

Pradeeshnarayan

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3 Comments

peyman gilmour Over a year ago

i get this message "<?xml version="1.0" encoding="utf-8"?> <string xmlns="tempuri.org/">Hello World</string>" actually i get my webservice value as xml format ... and now how can i get it as a simple text ,just "Hello World" ?

user554180 Over a year ago

If you just want text then return text from the server. Answer above.

peyman gilmour Over a year ago

Thank you so much Andrew . it`s so useful and helpful ;)

user554180 · Accepted Answer · 2012-08-20 09:43:31Z

1

[WebMethod] 
public string HelloWorld() 
{ 
   xmlDoc.LoadXml("<root><item>Hello World</item></root>");
   return xmlDoc.OuterXML;
}

answered Aug 20, 2012 at 9:43

user554180

1 Comment

Flater Over a year ago

The data type in the ajax call should also change then. I think this is just an issue of "Human error type mismatch".

Pradeeshnarayan · Accepted Answer · 2012-08-20 09:24:37Z

0

Are you able to alert msg or msg.success?

What is your return value from the ajax page?

Make sure you have a return argument 'd' from your ajax page.

answered Aug 20, 2012 at 9:24

Pradeeshnarayan

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1 Comment

peyman gilmour Over a year ago

Yes ... alert(msg) shows me "[object XMLDocument]" as a message ... and alert(msg.d) shows me undefined ...

Flater · Accepted Answer · 2012-08-20 09:40:50Z

0

 //my return value from webservice is just "hello"

If msg == "Hello"; then what should msg.d be? If you're only passing a string as a result, I don't see how that string can have a .d property attached to it.

answered Aug 20, 2012 at 9:40

Flater

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2 Comments

user554180 Over a year ago

By default WebMethod returns XML

Flater Over a year ago

By default. But in the poster's own comment: [WebMethod] public string HelloWorld() { return "Hello World"; }

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