c# webrequest 挂起

Question

我在做一个项目，多次调用一个网址

request = (HttpWebRequest)WebRequest.Create(url);
request.GetResponse();    

这是我的代码。它处于循环中，它工作了 2 次，但在第三次迭代时挂起。没有崩溃或错误。请帮忙。任何帮助将不胜感激。

错误:WAITING 20 分钟后。

System.Net.WebException was unhandled
Message=The operation has timed out
Source=System
StackTrace:
   at System.Net.HttpWebRequest.GetResponse()
   at ConsoleApplication1.Program.Main(String[] args) in C:\WorkSpace\ConsoleApplication1\ConsoleApplication1\Program.cs:line 48
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

内部异常:

Answer 1

尝试以下操作:

var response = request.GetResponse();
//do stuff with response
response.Close();

WebResponse 实例保持事件连接，您必须在与同一服务器建立新连接之前关闭该连接。

您也可以使用 using 子句来做到这一点，这完全取决于您:

using (var response = request.GetResponse())
{
    //do stuff with response
}