PUT请求在vb.net中工作但不在C＃.net中工作

Question

我正在使用C＃开发一个REST客户端，它执行以下操作：

1. 它向服务器发送一个POST请求，其中包含查询字符串参数PolicyId = myhotp和此json数据{＆＃34; uid＆＃34;：＆＃34; name ＆＃34;}
2. 服务器使用状态为id的json数据进行响应{＆＃34; state＆＃34;：＆＃34; 323434j2hj＆＃34;}
3. 我提取＆＃34; state＆＃34;的值从收到的json数据中发送 它在另一个PUT请求中使用OTP向同一服务器进行验证。 stateid作为查询字符串参数StateId = ihhfueh8f88发送，otp作为json数据发送{＆＃34; otp＆＃34;：＆＃34; 123456＆＃34;}。服务器根据状态ID验证OTP。

但是服务器响应了stateid无效。具有讽刺意味的是，当我使用旧的方式（即Microsoft.XMLHTTP来发出请求）时，同样的过程也可以工作，但它不能与HTTP客户端一起使用。我无法在查询字符串中传输状态ID。 这是我使用HTTP客户端的代码：

        User user = new User();
        user.uid = "username";
        String json = JsonConvert.SerializeObject(user);
        MessageBox.Show(json);
        HttpClient client = new HttpClient();
        client.BaseAddress = new Uri("http://fqdn");
        client.DefaultRequestHeaders.Add("Accept", "application/json");
        var response = client.PostAsync("api?myhotp", new StringContent(json, Encoding.UTF8, "application/json")).Result;
        var contents = response.Content.ReadAsStringAsync().Result;
        MessageBox.Show(contents);
        var obj = JObject.Parse(contents);
        string id = (string)obj["state"];
        MessageBox.Show(id);
        Otp otpObj = new Otp();
        otpObj.otp = "123456";
        String jsonotp = JsonConvert.SerializeObject(otpObj);
        MessageBox.Show(jsonotp);
        client = new HttpClient();
        client.BaseAddress = new Uri("http://fqdn");
        client.DefaultRequestHeaders.Add("Accept", "application/json");
        response = client.PutAsync("api?StateId="+id, new StringContent(json, Encoding.UTF8, "application/json")).Result;
        contents = response.Content.ReadAsStringAsync().Result;
        MessageBox.Show(contents);

以下是Microsoft.XMLHTTP的代码：

       Type xmlType = Type.GetTypeFromProgID("Microsoft.XMLHTTP");
        dynamic objXML = Activator.CreateInstance(xmlType);
        objXML.Open("POST", "http://fqdn/api?PolicyId=myhotp", false);
        objXML.setRequestHeader("Content-Type", "application/json");
        objXML.setRequestHeader("Accept", "application/json");
        //objXML.setOption(2, 13056);
        objXML.Send(json);
        MessageBox.Show(objXML.status.ToString());
        MessageBox.Show(objXML.responseText.ToString());
        var obj = JObject.Parse(objXML.responseText.ToString());
        String id = (String)obj["state"];
        MessageBox.Show(id);
        Otp otpObj = new Otp();
        otpObj.otp = "123456";
        json = JsonConvert.SerializeObject(otpObj);
        MessageBox.Show(json);
        objXML.Open("PUT", "http://fqdn/api?StateId="+id, false);
        objXML.setRequestHeader("Content-Type", "application/json");
        objXML.setRequestHeader("Accept", "application/json");
        objXML.Send(json);
        MessageBox.Show(objXML.status.ToString());
        MessageBox.Show(objXML.responseText.ToString());