C＃后台工作人员没有完成

Question

我遇到的问题是我的后台工作人员没有完成并且在一次运行后随后挂起。后台工作者处理一个运行线性阶段的程序，因此时机是正确的（因此所有的Thread.Sleep()调用都很重要。）

这是我的代码：

public MainForm()
        {
            InitializeComponent();
            bgW2.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgW2_RunWorkerCompleted);
        }
private void bgW2_DoWork(object sender, DoWorkEventArgs e)
        {
            string program = @"C:\Users\mikegjohn\source\repos\CLL AutoForce\Test.csv";
            var stream = new FileStream(program, FileMode.Open, FileAccess.Read);
            using (var streamReader = new StreamReader(stream))
            {
                string ln;
                while ((ln = streamReader.ReadLine()) != null)
                {
                    string[] lnArr = ln.Split(',');

                    switch (lnArr[1])
                    {
                        case "0":

                            sendCommand("L-");
                            string status = "";
                            while (status != "0")
                            {
                                Thread.Sleep(250);
                                status = loopCommands("PS");
                            }
                            Thread.Sleep(1000);
                            break;

                        case "1":
                            string p = Fn.convertPos(lnArr[3]);
                            sendCommand("X"+p);
                            string s = Convert.ToString(Fn.backconvert(loopCommands("PX")));

                            while (s != lnArr[3])
                            {
                                Thread.Sleep(250);
                                s = Convert.ToString(Fn.backconvert(loopCommands("PX")));
                            }
                            Thread.Sleep(1000);
                            break;
                        case "2":
                            Fn.MeasureLabel();
                            break;
                        case "3":
                            sendCommand("HSPD=500000");
                            Thread.Sleep(500);
                            sendCommand("LSPD=250000");
                            Thread.Sleep(500);
                            sendCommand("X0");
                            string x = Convert.ToString(Fn.backconvert(loopCommands("PX")));

                            while (x != lnArr[4])
                            {
                                Thread.Sleep(250);
                                s = Convert.ToString(Fn.backconvert(loopCommands("PX")));
                            }
                            Thread.Sleep(1000);
                            sendCommand("HSPD=250000");
                            sendCommand("LSPD=50000");
                            break;
                    }

                }
            }

        }


private void btnRun_Click(object sender, EventArgs e)
    {

        bgW2.RunWorkerAsync();
    }

    private void bgW2_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {

        MessageBox.Show("Program completed");
    }

Messagebox.Show永远不会开火。我已经看了一些其他类似的问题，主要是阻止UI线程。有人能指出我正确的方向吗？

Answer 1

您可能错过了DoWork事件。

public Form1() { 
    InitializeComponent(); 
    bgW2.DoWork += new DoWorkEventHandler(bgW2_DoWork) ;
    bgW2.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgW2_RunWorkerCompleted);
}

https://stackoverflow.com/a/14734610

Answer 2

发现我的问题 - 这是case "3"的一个错误，我没有接受

case "3":
                            sendCommand("HSPD=500000");
                            Thread.Sleep(500);
                            sendCommand("LSPD=250000");
                            Thread.Sleep(500);
                            sendCommand("X0");
                            string x = Convert.ToString(Fn.backconvert(loopCommands("PX")));

                            while (x != lnArr[4])
                            {
                                Thread.Sleep(250);
                                s = Convert.ToString(Fn.backconvert(loopCommands("PX"))); // <-- this does not match the while so it was getting stuck in the loop 
                            }
                            Thread.Sleep(1000);
                            sendCommand("HSPD=250000");
                            sendCommand("LSPD=50000");
                            break;