Question

我有此操作合同

[OperationContract]
        [WebInvoke(Method = "POST",
            ResponseFormat = WebMessageFormat.Json,
            UriTemplate = "/post/address/")]
        ADE.Address GetPostAddress(PostContract DataContract);

这是DataContract

[DataContract]
    public class PostContract
    {
        [DataMember]
        public string k { get; set; }

        [DataMember]
        public string source { get; set; }

        [DataMember]
        public int isUrl { get; set; }

        [DataMember]
        public string ISO2Code { get; set; }
    }

我尝试从控制台应用程序使用

执行此操作

using (var client = new WebClient())
{               
   var data = new NameValueCollection();
   data["k"] = "bla bla bla";
   data["source"] = "test text";
   data["isUrl"] = "0";
   data["ISO2Code"] = "be";

   var response = client.UploadValues("http://localhost:83/Ade.svc/post/address/", data);

   var responseString = Encoding.Default.GetString(response);
   }

我一直收到400错误回复。我使用GET提供相同的服务，并且工作正常，有时source超过2000个字符，因此，我必须使用POST。

我错过了什么明显的东西？

Answer 1

错误的请求响应是因为内容类型错误。必须从Webclient切换到httpWebRequest

然后，我可以将ContentType设置为"application/json"，这是必需的。我无法使用Content-Type更改标题Webclient。

以下代码有效：

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:83/Ade.svc/post/address");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
               {
                   string json = "{\"k\":\"key\"," +
                       "{\"source\":\"test test\"," +
                       "{\"isUrl\":\"0\"," +
                       "\"ISO2Code\":\"be\"}";

                   streamWriter.Write(json);
                   streamWriter.Flush();
                   streamWriter.Close();
               }

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

<强>更新为了避免在字符串中使用无效字符的错误请求，请使用Json创建自定义类和SerializeObject。

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
                        {
                            //
                            // Create new reques object
                            //
                            RequestObject rObj = new RequestObject();
                            rObj.k = ConfigurationManager.AppSettings["restkey"].ToString();
                            rObj.source = row["SearchText"].ToString();
                            rObj.isUrl = "0";
                            rObj.ISO2Code = "be";

                            streamWriter.Write(JsonConvert.SerializeObject(rObj));
                            streamWriter.Flush();
                            streamWriter.Close();
                        }

Answer 2

也许试试这个：

[Serializable]
[DataContract(Name = "PostContract")]
public class PostContract
{
    [DataMember(Name = "k")]
    public string k { get; set; }

    [DataMember(Name = "source")]
    public string source { get; set; }

    [DataMember(Name = "isUrl")]
    public int isUrl { get; set; }

    [DataMember(Name = "ISO2Code")]
    public string ISO2Code { get; set; }
}

使用POST进行WCF服务的问题

2 个答案: