C# Socket 捕获不到异常
IPEndPoint myServer = new IPEndPoint(IPAddress.Parse(textBox_ServerIp.Text), 5588); _tcpListener = new TcpListener(myServer); _tcpListener.Start(); while (true) { try { TcpClient ss = _tcpListener.AcceptTcpClient(); Thread t = new Thread(RecieveData); t.Start(ss); } catch (Exception ex) { Common.CommonRoutine.HandlingExceptions(ex); } } public void RecieveData(object obj) { TcpClient tcpClient = obj as TcpClient; StateObject stateObject = new StateObject() { WorkSocket = tcpClient }; while (true) { try { if (tcpClient != null && tcpClient.Client != null ) tcpClient.Client.BeginReceive(stateObject.Buffer, 0, stateObject.Buffer.Length, SocketFlags.None, RecieveComplete, stateObject); stateObject.ResetEvent.WaitOne(); // Thread.Sleep(1000); //MessageBox.Show("s"); } catch (Exception ex) { MessageBox.Show(ex.Message); } } } public void RecieveComplete(IAsyncResult result) { StateObject state = (StateObject)result.AsyncState; TcpClient tcpClient = state.WorkSocket; if (tcpClient == null || tcpClient.Client == null || !tcpClient.Client.Connected) { return; } int bytesRed = tcpClient.Client.EndReceive(result); if (bytesRed > 0) { byte[] receData = new byte[bytesRed]; Array.Copy(state.Buffer, 0, receData, 0, bytesRed); byte[] realData = OperateCmdData.RestoreReceData(receData); if (OperateCmdData.JudgeisCompleteData(realData)) { byte[] sendData = OperateCmdData.AnalysisMessageId(receData); if (sendData.Length > 19) tcpClient.Client.Send(sendData); } } state.ResetEvent.Set(); }tcpClient.Client.BeginReceive(stateObject.Buffer, 0, stateObject.Buffer.Length, SocketFlags.None, RecieveComplete, stateObject); stateObject.ResetEvent.WaitOne(); Thread.Sleep(1000);
while (true) { try { if (tcpClient != null && tcpClient.Client != null ) tcpClient.Client.BeginReceive(stateObject.Buffer, 0, stateObject.Buffer.Length, SocketFlags.None, RecieveComplete, stateObject); stateObject.ResetEvent.WaitOne(); // Thread.Sleep(1000); //MessageBox.Show("s"); } catch (Exception ex) { MessageBox.Show(ex.Message); } }
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try { //可能发生异常的代码块 } catch (Exception ex) { Action act = new Action(() => { throw ex; }); this.Invoke(act); }
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可以用个全局变量接收子线程异常的内容，然后，主线程查这个值。。从而传到主线程
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我建议定义一个自己的异常类，在需要捕获的任何一个线程里用不同的实例编码(对象的唯一性)来记录，这样也可第一时间找到程序的出错地方，之后再进行单步调试
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Dim msgex As String = "" '出错消息的传替，=“” 无错，！！’=================== try 。。。 msgex = "" ‘正常来 End If Catch ex As Exception msgex = ex.Message '出错消息的传替，=“” 无错，！这个只是提示消息！从一个线程传替到UI End Try ‘。。。’===================’=================== If msgex = "" Then '出错消息的传替，=“” 无错，！！ ' MsgBox("发送完毕！", , "^-^ 提示 ^-^ ") Else MsgBox("发送被中断！" & msgex, , "^-^ 提示 ^-^ ") '由异步线程传替过来的出错消息。 End If
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单步跟踪一下，呵呵呵
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RecieveComplete里面你判断了read的字节数，但如果字节数为0，其实就表示客户端已经断开了链接，但你好像没有处理
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你的问题很简单，还有另一法，使用异步委托调用方式，可以传替出错从子线程到UI线程，
如果用VB.NET 来做，一行异步调用指令可以完成，记住异步委托哦
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给你个异步调用的例，参考后改入你的环境中，，
BeginInvoke(New EventHandler(AddressOf Addmsg), "服务端已启动，正在等待连接......") '线程内用委托办法做别的事
‘===================
Private Sub Addmsg(ByVal addtxt As System.Object, ByVal e As System.EventArgs) '将消息只写入LISTBOX1
'非UI线程调用窗体控件，保证线程安全。与聊天实现无关。
If addtxt.ToString <> "" Then
If ListBox1.Items.Count > 127 Then
clientmsg.Text = ""
ListBox1.Items.Clear()
End If
ListBox1.Items.Add(addtxt.ToString)
End If
' GC.Collect()
End Sub
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给你个异步调用的例，参考后改入你的环境中，，
BeginInvoke(New EventHandler(AddressOf Addmsg), "服务端已启动，正在等待连接......") '线程内用委托办法做别的事
‘===================
Private Sub Addmsg(ByVal addtxt As System.Object, ByVal e As System.EventArgs) '将消息只写入LISTBOX1
'非UI线程调用窗体控件，保证线程安全。与聊天实现无关。
If addtxt.ToString <> "" Then
If ListBox1.Items.Count > 127 Then
clientmsg.Text = ""
ListBox1.Items.Clear()
End If
ListBox1.Items.Add(addtxt.ToString)
End If
' GC.Collect()
End Sub
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