Question

我正在尝试制作Windows Form App。该应用程序使用多线程，每个线程调用一个方法，它更新在主线程上创建的控件。我使用invoke更新控件，应用程序适用于Windows服务器企业，但它在Windows 7 64位上运行。在WIndows 7上，应用程序在更新界面2次后停止执行任何操作。我不知道这似乎是什么问题。我试过多个线程和任务（Task.Factory.StartNew()），我有相同的结果（更新控件2次）。没有错误消息。谢谢。

修改在CallMethod()我正在呼叫WCF并等待响应。似乎WCF调用正在为前两个线程返回一些东西，而其余的则不是......

代码：

主要方法：

            for (int i = 0; i < NoThreads; i++)
            {
                int index = i;
                Thread t = new Thread(CallMethod);
                t.Name = "Thread [" + Cicle + "] Cicle [" + i + "]";
                threads[i] = t;

            }
            for (int i = 0; i < NoThreads; i++)
            {
                threads[i].Start();
            }

CallMethod：

private string CallMethod()
{
 try
   {
      //calling a webservice

      string message = .....
      if (txtResult.InvokeRequired)
      { txtResult.Invoke((MethodInvoker)(() => txtResult.AppendText(message))); }
 catch
 {throw;}

}

Answer 1

对于调试，请确保通过CallMethod（）的所有路径都更新UI（即使它只是带有“到此点”文本）。似乎txtResult.InvokeRequired可能是false，或者您可能正在从Web请求中获得异常。

Answer 2

解决了问题 我必须在每个线程中调用WCF后关闭连接

Answer 3

在x64计算机（Windows 7）上处理线程的示例：

class Server
{
    private TcpListener tcpListener;
    private Thread listenThread;
    private static string rootPath = "";
    public Server()
    {
        IPAddress ipAddress = Dns.Resolve("localhost").AddressList[0];
        this.tcpListener = new TcpListener(ipAddress, 9501);
        //this.tcpListener = new TcpListener(RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["Endpoint1"].IPEndpoint);
        this.listenThread = new Thread(new ThreadStart(ListenForClients));
        Trace.WriteLine("Server Working", "Information");
        this.listenThread.Start();
    }


    private void ListenForClients()
    {
        this.tcpListener.Start();
        Trace.WriteLine("Server TcpListener Started", "Information");
        while (true)
        {
            //blocks until a client has connected to the server
            TcpClient client = this.tcpListener.AcceptTcpClient();
            Trace.WriteLine("Server TcpListener New Client", "Information");
            // create a thread to handle the client
            //ParameterizedThreadStart HandleClientConn;
            Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
            clientThread.Start(client);
        }
    }

    private void HandleClientComm(object client)
    {
        Trace.WriteLine("Server TcpListener New Client Handle Thread", "Information");
        TcpClient tcpClient = (TcpClient)client;
        NetworkStream nStream = tcpClient.GetStream();
        Image img = Image.FromStream(nStream);
        Trace.WriteLine("Server TcpListener Image is received", "Information");
        string imageName = client.GetHashCode() + ".jpg";
        string imagePath = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot") + @"\", @"approot\"+ imageName);
        img.Save(imagePath, ImageFormat.Jpeg);
        rootPath = Environment.GetEnvironmentVariable("RoleRoot");
        Dictionary<string, string> templates = GetTemplates();
        string sDataDir = String.Format("{0}StasmData\\", rootPath);
        StasmHelper stasm = new StasmHelper();
        Face retVal = stasm.GetHumanFace(imagePath, sDataDir, templates);

        File.Delete(imagePath);
    }

多线程应用程序无法在Windows 7上运行

3 个答案: