错误：提交请求后无法执行此操作 [英] Error: This Operation cannot be performed after request has been submitted

问题描述

我编写了关于 httpwebrequest 和 httpwebresponse 的代码。我需要将数据发送到服务器但得到此异常在提交请求后无法执行此操作。请参阅以下代码：

I've written code about httpwebrequest and httpwebresponse . I need to send data to server but got this exception "This operation cannot be performed after request has been submitted". see the following code:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://"+remoteServer+":8080/");
request.Credentials = CredentialCache.DefaultCredentials;
//Stream NewReqstream = request.GetRequestStream();
request.Method = "POST";
//request.ContentLength = cmd.Length;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Console.WriteLine("Connected..");

// Send the command
//clientSocket.Send(cmd);

Stream NewReqstream = request.GetRequestStream(); //<-- Error here
NewReqstream.Write(cmd, 0, cmd.Length);
NewReqstream.Close();

推荐答案

当您收到响应流时，请求已提交你不能在那里操作......

when you get the response stream the request is submitted so you can not the operation there...

试试看：

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://"+remoteServer+":8080/");
request.Credentials = CredentialCache.DefaultCredentials;
//Stream NewReqstream = request.GetRequestStream();
request.Method = "POST";
//request.ContentLength = cmd.Length;

// Send the command
//clientSocket.Send(cmd);

Stream NewReqstream = request.GetRequestStream(); //<-- Error here
NewReqstream.Write(cmd, 0, cmd.Length);
NewReqstream.Close();

// Get the response
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Console.WriteLine("Connected..");

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