Question

I have standard asmx webservice returning Json:

private void ReturnUser(string name)
{
    User user = new User(name);
    DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
    MemoryStream stream = new MemoryStream();
    serializer.WriteObject(stream, @object);
    string jsonString = Encoding.UTF8.GetString(stream.ToArray());
    stream.Close();

    HttpContext.Current.Response.AddHeader("ContentType", "application/json");
    HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
    HttpContext.Current.Response.Write(jsonString);
    HttpContext.Current.Response.End();
}

On the other side, I want to try that webservice is running, so I try call the POST:

string data = "name=test";
byte[] dataStream = Encoding.UTF8.GetBytes(data);

WebRequest request = WebRequest.Create("http://tempuri.org/External.asmx?op=ReturnUser");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = dataStream.Length;
Stream reqStream = request.GetRequestStream();
reqStream.Write(dataStream, 0, dataStream.Length);
reqStream.Close();
WebResponse response = (HttpWebResponse)request.GetResponse();

Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream);
string json = reader.ReadToEnd();
stream.Close();
reader.Close();

Console.Write(json);
Console.Read();

But I get Error 500. From browser is the webservice running like a charm 🙁

Answer 1

Finally, I solved this, may be this helps to someone else:

string data = "name=test";
byte[] dataStream = Encoding.UTF8.GetBytes(data);

WebRequest request = WebRequest.Create("http://tempuri:org/External.asmx/ReturnUser");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
Stream stream = request.GetRequestStream();
stream.Write(dataStream, 0, dataStream.Length);
stream.Close();
WebResponse response = request.GetResponse();

Stream respStream = response.GetResponseStream();
StreamReader reader = new StreamReader(respStream);
string json = reader.ReadToEnd();
stream.Close();
reader.Close();

Thanks to all