VB.NET客户端服务器简单应用程序 [英] VB.NET Client Server Simple Application

问题描述

您好我开始在VB.NET中学习服务器客户端应用程序。本教程是我搜索过的 https://www.youtube.com/watch?v=MSiBbtxWpI8 [< a href =https://www.youtube.com/watch?v=MSiBbtxWpI8target =_ blanktitle =New Window> ^ ]



但是我的 ReadLine 在打开客户端应用程序时暂停

 私有  Sub 倾听（）
 执行直到不 IsListening 
 如果 Server.Pending 那么 
 Client = Server.AcceptTcpClient 
 ClientData = 新 IO.StreamReader（Client.GetStream）
 结束 如果 
 尝试 
  RaiseEve nt  MessageReceived（ Me ，ClientData.ReadLine）'  PAUSE  
  Catch  ex  As 异常
  RaiseEvent  MessageReceived（ Me ， 错误）
 结束 尝试 
 Threading.Thread.Sleep（ 100 ）
 循环 
 结束  Sub  
 

首先，我尝试过重做这与使用Timer或Backgroundworker相同。所以我复制了教程中显示但无法正常运行的代码。



请帮助..谢谢

解决方案

< blockquote>好的是 - 它会做的。

ReadLine是所谓的阻塞操作：它直到流提供完整的数据行（由换行符终止）或它到达时才返回流的结尾。

如果ReadLine挂起，则它正在等待TCP连接的另一端发送新的行字符或序列。



首先检查另一端：如果看起来不错，请尝试逐个字符阅读，看看你是否得到任何东西......

Hello I'm starting to learn Server Client Application in VB.NET. This tutorial is what I have searched https://www.youtube.com/watch?v=MSiBbtxWpI8[^]

But my ReadLine is paused when opening the client application

Private Sub Listening()
    Do Until Not IsListening
        If Server.Pending Then
            Client = Server.AcceptTcpClient
            ClientData = New IO.StreamReader(Client.GetStream)
        End If
        Try
            RaiseEvent MessageReceived(Me, ClientData.ReadLine) 'PAUSE
        Catch ex As Exception
            RaiseEvent MessageReceived(Me, "Error")
        End Try
        Threading.Thread.Sleep(100)
    Loop
End Sub

First, I have tried reworking this using Timer or Backgroundworker same happens. So I copy the code shown on tutorial but unable to run properly.

Please Help.. Thanks

解决方案

Well yes - it will do.
ReadLine is what is called a "blocking" operation: it does not return until the stream provides a complete line of data (terminated by a newline) or it reaches the end of the stream.
If ReadLine hangs, then it is waiting for the other end of the TCP connection to send a new line character or sequence.

Check the other end first: if that looks OK, try reading character by character and see if you get anything at all...

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