在C＃中使用WebClient发布数据和服务器重播Bad Gateway

Question

I need to write c# code for Login at myServer. I try with this code, but myServer reply me always with the same response (502) Bad Gateway

        ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true;
        string result = "";
        string json = "{\"UserName\": \"myUser\", \"Password\": \"myPassword\"}";

        using (var client = new WebClient())
        {
            client.Headers[HttpRequestHeader.ContentType] = "application/json";
            client.Encoding = Encoding.UTF8;
            result = client.UploadString("https://<myServer>/Login", "POST", json;
        }

When I try to connect to server with the Google Chrome App Postman or Arc , the Login have successful.

Where is the error in my code?

Answer 1

For resolve this problem I had used the HttpWebResponse class instead of WebClient .

This is the finally code

        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("https://myserver");
        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            string json = new JavaScriptSerializer().Serialize(new
            {
                UserName = "<myUserName>",
                Password = "<myPassword>"
            });
            streamWriter.Write(json);
        }

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            Console.WriteLine(streamReader.ReadToEnd());
        }