Post Json Data to Rest API - rest

Question

I'm developing WP8 app and i'm new to it.. i want to know my post method is correct or not because i'm unable to post my data in the url it produces an exception..
My Class Contents...
public class Register
{
public int id { get; set; }
public string password_reset_hash { get; set; }
public string temp_password { get; set; }
public bool remember_me { get; set; }
public string activation_hash { get; set; }
public string ip_address { get; set; }
public bool status { get; set; }
public bool activated { get; set; }
public string permissions { get; set; }
public DateTime last_login { get; set; }
public DateTime created_at { get; set; }
public DateTime updated_at { get; set; }
public string email { get; set; }
public string password { get; set; }
public string conformpassword { get; set; }
public string username { get; set; }
}
here is my code..
public void btn_register_click(object sender, RoutedEventArgs e)
{
string url="myurl";
Register res=new Register();// my class
res.email = txt_email.Text;
res.password = txt_password.Text;
res.conformpassword = txt_conf_psswrd.Text;
res.username = txt_username.Text;
res.created_at = DateTime.Now;
res.last_login = DateTime.Now;
res.updated_at = DateTime.Now;
res.status = true;
json = JsonConvert.SerializeObject(res);
WebClient wc = new WebClient();
var URI = new Uri(url);
wc.Headers["Content-Type"] = "application/json";
wc.Headers["ACCEPT"] = "application/json";
wc.UploadStringCompleted += new UploadStringCompletedEventHandler(wc_UploadStringCompleted);
wc.UploadStringAsync(URI, "POST", json);
}
private void wc_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
{
try
{
MessageBox.Show(e.Result);
//e.result fetches you the response against your POST request.
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString()); //i'm getting error here..
}
}
My Screen Design..
Error is..
Thanks

Answer 1

It looks to me like there is a problem with the URI you are using. The error message you posted shows the server returning a "Not found" header. Maybe it just is not quite correct? I did not see the exact URI in the code you posted. string url="myurl"; does not look like this is the url you want to use.
That's also why you can't access the response stream without an exception with this line: MessageBox.Show(e.Result);. There just is no valid response. This is documented here: http://msdn.microsoft.com/de-de/library/system.net.uploadstringcompletedeventargs.result%28v=vs.110%29.aspx.
You can determine if such an error occurred by checking the Error property of UploadStringCompletedEventArgs (http://msdn.microsoft.com/de-de/library/system.net.uploadstringcompletedeventargs%28v=vs.110%29.aspx).