请求.ContentType = "application/json"在WCF方法上给出错误请求错误

本文关键字：请求 quot 错误 方法 出错 WCF ContentType application json | 更新日期: 2023-09-27 18:10:56

我使用WCF REST服务模板40(CS)创建了一个WCF服务，方法头看起来像这样:

[WebInvoke(UriTemplate = "CTNotification", Method = "POST", ResponseFormat = WebMessageFormat.Json,
          RequestFormat = WebMessageFormat.Json)]      
public string CTNotification(Stream contents)

，下面是我如何使用它:

 string url = ConfigurationManager.AppSettings["serviceUrl"];                  
 string requestUrl = string.Format("{0}CTNotification", url);
 HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUrl);
 request.Method = "POST";
 request.ContentType = "application/json";
 //request.ContentType = "text/plain"; 
 request.Timeout = 5000000;                
 byte[] fileToSend = File.ReadAllBytes(Server.MapPath("~/json.txt"));
 request.ContentLength = fileToSend.Length;
 using (Stream requestStream = request.GetRequestStream())
 {
     // Send the file as body request.
     requestStream.Write(fileToSend, 0, fileToSend.Length);
     requestStream.Close();
 }
 using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
     Console.WriteLine("HTTP/{0} {1} {2}", response.ProtocolVersion, (int)response.StatusCode, response.StatusDescription);
 Label1.Text = "file uploaded successfully";

给出错误400。但如果它让内容类型简单，它工作，但我想传递json，它存储在json。txt。请告诉我怎么做?

谢谢。

请求.ContentType = "application/json"在WCF方法上给出错误请求错误

您的服务给出400错误，因为您传递给服务的数据不是JSON格式。您已经用RequestFormat = WebMessageFormat.Json装饰了您的操作合同，因此它只接受JSON格式的数据。

您正在使用Stream数据向服务发出请求，其MIME类型为"text/plain" and "application/octet-stream"。要将JSON发送到存储在文件中的服务，您需要在服务和客户端中进行以下更改:

服务:

[WebInvoke(UriTemplate = "CTNotification", Method = "POST", ResponseFormat =WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
public string CTNotification(string contents)
客户:

string fileToSend = File.ReadAllText(Server.MapPath("~/json.txt"));

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