在MVC4中从我的控制器传递复杂数据类型时，在web api中获取null

Question

I have create a seprate web api project and another mvc4 project. When i am passing integer or string to web api its working fine and geting saved. But now i trying to pass comlex data to web api but i getting null in my project. My codes are.

MVC4...

readonly string uri = "http://localhost:1900/api/LoginApi";
public string RegisterIcaUser(StudentModel _StudentModel)
    {
        using (WebClient webClient = new WebClient())
        {
            string newUri = uri + "?SM=" + _StudentModel;
            return JsonConvert.DeserializeObject<string>(webClient.DownloadString(newUri));
        }          
    }

Web Api....

 [HttpGet]
    public string RegisterIcaUser([FromUri]StudentModel SM)
    {
        string strResult = "F";
        return strResult;
    } 

Answer 1

string newUri = uri + "?SM=" + _StudentModel;

above statement is wrong this would resutl in "http://localhost:1900/api/LoginApi?SM=Somenamespace.StudentModel"; as ToString method of Object returns fully qualified text of class name with namespace if any.

instead of specifying it on query string you should post studentmodel data.

Here is some good SO thread on posting data to url with WebClient . link