How to best pass and consume JSON data from angularJs to asp.net MVC - currently always has values set to null

Question

This is similar to: another stack overflow q

I have tried something similar to this question:

var MyItem= { "msg": "hello word!" };

$http.post("/MyController/testPost", MyItem).success(function (data) {
    Alert(ok)
})

I have also tried creating MyItem as a Javascript object.

Then in MyController:

[post]
public void testPost(MyItem MyItem)
{

 }

Where MyItem, looks like this:

public class MyItem
{
    public string msg; 
}

The action in the controller is always hit in all scenarios, but MyItem is always has a null value for msg. Am I missing something? Is there a better way of doing this?

Shouldn't the signature for testPost be testPost(MyItem RiskItem) and shouldn't your post be passing RiskItem instead of MyItem? Like $http.post("/MyController/testPost", RiskItem) ? — ragerory
– ragerory, Commented Mar 26, 2015 at 17:09
Thanks - that was a typo in writing my question - the problem still stands though — trees_are_great
– trees_are_great, Commented Mar 26, 2015 at 17:12
you said the Action gets hit, but does that particular method get hit? If you set a breakpoint inside testPost does it get hit? — ragerory
– ragerory, Commented Mar 26, 2015 at 17:15
Yes, it does. Just the msg value in the MyItem parameter is null. Actually, putting a breakpoint in the javacript post action, I can see that the value of msg is null before it is sent — trees_are_great
– trees_are_great, Commented Mar 26, 2015 at 17:19
That last comment is actually quite vital to getting a good answer to this question. Please consider editing it into the question, as it is a JavaScript problem, not an ASP.NET problem. — Heretic Monkey
– Heretic Monkey, Commented Mar 26, 2015 at 17:34

Viktar Tserashchuk · Accepted Answer · 2015-03-26 21:11:15Z

3

For me it started to work when I had changed the "msg" field to property. No additional attributes except [HttpPost] for the controller.

    public class MyItem
    {
        public string msg { get; set; }
    }

    [HttpPost]
    public ActionResult testPost(MyItem MyItem)
    {

    }

answered Mar 26, 2015 at 21:11

Viktar Tserashchuk

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1 Comment

trees_are_great Over a year ago

I just came in this morning and tried that (before looking at your post). Yes, that works, it needs to be a property, not a field. Thanks!

ragerory · Accepted Answer · 2015-03-26 17:25:41Z

1

I would try two options...

Try changing var MyItem= { "msg": "hello word!" }; to..

var MyItem = { msg: "hello word!" };

or

var MyItem = {};
MyItem.msg = "hello world!";

answered Mar 26, 2015 at 17:25

ragerory

1,3761 gold badge10 silver badges29 bronze badges

6 Comments

matt_lethargic Over a year ago

Also strip out all the wcf attributed sh!t and put [HttpPost] on your action

trees_are_great Over a year ago

I have tried these and have just tried them again, but they also have a null msg even on the post method on the way in.

trees_are_great Over a year ago

haha, those attributes are also gone Matt - I just tried those in because nothing seems to work

ragerory Over a year ago

@Sam have you looked at this -- victorblog.com/2012/12/20/…

trees_are_great Over a year ago

I have tried this, but it does not work unfortunately - the config updates correctly, but the same issues remain.

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