C# 与另一个线程通信

这就是我如何创建一个线程，该线程可以重复多次：

线程类：

public class Nuker
{
    private string target;
    private int reps;
    //...
    public void nuke()
    {
        for(int i=0; i<reps; ++i)
        {
            ICBM.nuke(target);
            Thread.Sleep(5500);
        }
    System.Console.WriteLine("Done.");
    }
}

我创建了一个新类来存储一些变量，因为我无法在ThreadStart中传递这些变量

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现在我想对这个过程进行一个简单的可视化，比如说在表单的文本字段中打印当前的重复。我将如何使用循环中的I来实现这一点？

您可以使用backgroundworker来实现，这是最简单的线程之一：- 下面我给你发了一个我为教一些朋友使用backgroundworker而创建的示例-

private BackgroundWorker bw = new BackgroundWorker();

public Form1()
{
    InitializeComponent();
    bw.WorkerReportsProgress = true;
    bw.WorkerSupportsCancellation = true;
    bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
    bw.DoWork += new DoWorkEventHandler(bw_DoWork);
    bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
}

public void buttonStart_Click(object sender, EventArgs e)
{
    if (bw.IsBusy != true)
        bw.RunWorkerAsync(12); //Start
}

public int Pils(int i)
{
    Thread.Sleep(2000);
    bw.ReportProgress(70, "In the middle of the work..");
    Thread.Sleep(2000);
    bw.ReportProgress(90, "Returning the result..");
    Thread.Sleep(2000);
    return (2 * i);
}

private void bw_DoWork(object sender, DoWorkEventArgs e)
{
    bw.ReportProgress(20, "Waiting for cancel.."); 
    Thread.Sleep(2000);
    if ((bw.CancellationPending == true))
        e.Cancel = true;
    else
    {
        bw.ReportProgress(50, "Starting process..");
        e.Result = Pils((int)e.Argument);
    }
}

private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    bw.ReportProgress(100, "Work done.."); 
    if ((e.Cancelled == true))
         textBox1.Text = "Canceled!";
    else if (e.Error != null)
         textBox1.Text = ("Error: " + e.Error.Message);
    else textBox1.Text = e.Result.ToString();
}

private void buttonCancel_Click(object sender, EventArgs e)
{
    if (bw.WorkerSupportsCancellation == true)
        bw.CancelAsync();
}

private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    listBox1.Items.Add((e.ProgressPercentage.ToString() + "%") + " - " + e.UserState as String);
}

---

blogpost的url:

以最简单的形式，您在Nuker类中证明了回调

公共Nukerstring目标，int reps，Action reportCallback{..}

在循环中，您只需调用reportCallbacki

与

但是，您可能希望使用具有内置方法的来报告UI线程上的进度。只需查看MSDN上的示例

private BackgroundWorker bw = new BackgroundWorker();

public Form1()
{
    InitializeComponent();
    bw.WorkerReportsProgress = true;
    bw.WorkerSupportsCancellation = true;
    bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
    bw.DoWork += new DoWorkEventHandler(bw_DoWork);
    bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
}

public void buttonStart_Click(object sender, EventArgs e)
{
    if (bw.IsBusy != true)
        bw.RunWorkerAsync(12); //Start
}

public int Pils(int i)
{
    Thread.Sleep(2000);
    bw.ReportProgress(70, "In the middle of the work..");
    Thread.Sleep(2000);
    bw.ReportProgress(90, "Returning the result..");
    Thread.Sleep(2000);
    return (2 * i);
}

private void bw_DoWork(object sender, DoWorkEventArgs e)
{
    bw.ReportProgress(20, "Waiting for cancel.."); 
    Thread.Sleep(2000);
    if ((bw.CancellationPending == true))
        e.Cancel = true;
    else
    {
        bw.ReportProgress(50, "Starting process..");
        e.Result = Pils((int)e.Argument);
    }
}

private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    bw.ReportProgress(100, "Work done.."); 
    if ((e.Cancelled == true))
         textBox1.Text = "Canceled!";
    else if (e.Error != null)
         textBox1.Text = ("Error: " + e.Error.Message);
    else textBox1.Text = e.Result.ToString();
}

private void buttonCancel_Click(object sender, EventArgs e)
{
    if (bw.WorkerSupportsCancellation == true)
        bw.CancelAsync();
}

private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    listBox1.Items.Add((e.ProgressPercentage.ToString() + "%") + " - " + e.UserState as String);
}

Nuker n = new Nuker(target, reps, ReportMethod);

private void ReportMethod(int currentIdx)
{
    if (InvokeRequired) // Invoke if UI update
    ...
}