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I'm trying to create a new Salesman with Angular and C#. From Angular i collect the data the user has typed into an array (newData) and sending it from my controller --> service to my C# controller server-side. But i get several errors and it can't get my object.

Angular controller:

$scope.addSalesman = function (newData) {
    myService.addNewSalesman(newData).then(function (data) {
      console.log(data);
    }, function (err) {
      console.log(err);
    });
  };

Angular service:

addNewSalesman: function (newData) {
            var deferred = $q.defer();
            $http({
                method: 'POST',
                url: '/api/Salesman',
                headers: { 'Content-type': 'application/json' }
            }, newData).then(function (res) {
                deferred.resolve(res.data);
            }, function (res) {
                deferred.reject(res);
            });
            return deferred.promise;
        }

C# controller:

public HttpResponseMessage Post([FromBody] newData newdata) {
            return Request.CreateResponse(HttpStatusCode.OK);
        }

My errors are on the C# controller:

The type or namespace "newData" could not be found

"HttpRequest" does not contain a definition for "CreateResponse" accepting first argument of type "HttpRequest"

I tried adding the using System.Net.Http; and using System.Net; but doesn't work. Any suggestions?

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3 Answers 3

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2

You are getting two compile time errors which don't really have anything to do with one another.

1. The type or namespace "newData" could not be found

Is caused because your parameter type "newData" is not a known type in your code. Say you create a class like 

public class Salesman
{
    public long Id { get; set; }
    public string Name { get; set; }
}

and the javascript object is

var salesman = {
    id = 2,
    name = "Peter Sellers"
};

Now when you're passing this object in, for example by using $http.post

var res = $http.post('/api/addsalesman', salesman);
res.success(function (data, status, headers, config) {
    alert(data);
});
res.error(function (data, status, headers, config) {
    alert('error');
});

then the following Controller method would be able to parse it.

[Route("/api/addsalesman")]
[HttpPost]
public IActionResult AddSalesman([FromBody] Salesman salesman)
{

}

2. "HttpRequest" does not contain a definition for "CreateResponse" accepting first argument of type "HttpRequest"

The method CreateResponse() doesn't exist for this.Request. Anyways, I would suggest returning an object, which would be automatically serialized. Alternatively, you could return a not found response resulting in 404, or even throw an Exception, resulting in Statuscode 500.

[Route("/api/addsalesman")]
[HttpPost]
public IActionResult AddSalesman([FromBody] Salesman salesman)
{
    //Do Stuff
    if (stuffNotOk)
    {
        return NotFound();
    }
    return Ok(product); 
}
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5 Comments

Very good explanation, but i'm getting an error with IHttpActionResult: The type or namespace 'IHttpActionResult' could not be found. Not sure if i has anything to do with that i'm running ASP.NET Core Web Api. Just read a post where someone said, that i should use using System.Net.Http; but that doesn't do it.
What would the stuffNotOk be in my example to check on, if i may ask?
It would really depend on what you're doing with the Salesman object you received. Perhaps you wanna check if everything is valid before you store in a database or, when updating, if it exists in the first place.
Let's say if i want to check if it contains some data of any sort. How do i do that? Sorry for bothering you with these newbie questions
You could for example check if there's a name given with an if statement: if(string.IsNullOrEmpty(salesman.Name)){ ... } But this is really no longer on-topic.
0

It looks like you may have misspelled the name of the argument type you expect in your Post method:

//                                         v-- this is your sinner
public HttpResponseMessage Post([FromBody] newData newdata) {
    return Request.CreateResponse(HttpStatusCode.OK);
}
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6 Comments

Still the same error with both newData and CreateResponse :(
Do you have a class named newData in your C# project?
No, but i thought i just could parse the data fra Angular into it, so it knew what i was
C# is (generally) a strongly typed language. The method has to know which type the argument is. The place where you've put newData is actually where you tell C# which type to expect, so the compiler expects there to be a class named newData. You should replace that with the class you're actually expecting - if you don't have one yet, you should create one. Sigge explains it quite well in his answer so I suggest you look at that. I also suggest you to check out some tutorials on C#.
If the font-end type matches your Salesman-type, then server-side you should replace newData with Salesman.That's a start. But Sigge really have it all in his answer already. :-)
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The type or namespace "newData" could not be found

This means that class newData should be created which reflect data passed by UI

"HttpRequest" does not contain a definition for "CreateResponse" accepting first argument of type "HttpRequest"

Try this

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1 Comment

Since i'm working in an ASP.NET Core Web api project, i can't set the controllers extend to ApiController, but Controller instead (they merged it in the later versions, as i could read)

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