如何通知窗体在其他类中执行线程

本文关键字：其他 执行 线程 窗体 何通知 通知 | 更新日期: 2023-09-27 18:01:44

我有两个表单叫做frm1和frm2:

public partial class frm1 : Form
    {
        private WebMethods wm;
        public frm1()
        {
            InitializeComponent();
        }

        private void button_Click(object sender, EventArgs e)
        {
            wm = new WebMethods();
            wm.test();
        }
    }

public partial class frm2 : Form
{
    private WebMethods wm;

    public frm2()
    {
        InitializeComponent();
    }

    private void button_Click(object sender, EventArgs e)
    {
        wm = new WebMethods();
        wm.test();
    }
}

现在我有一个类叫做WebMethods:

class WebMethods
{
    private BackgroundWorker backgroundWorker;

    public void stop(){
        backgroundWorker.CancelAsync();
    }

    public void test()
    {
        if (backgroundWorker.IsBusy != true)
        {
            this.backgroundWorker = new BackgroundWorker();
            backgroundWorker.WorkerSupportsCancellation = true;
            backgroundWorker.DoWork += new DoWorkEventHandler(_PostRequest);
            backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(_PostRequestComplet  ed);
            backgroundWorker.RunWorkerAsync();
        }
    }

    private void _PostRequest(object sender, DoWorkEventArgs e)
    {
        // ...
    }

    private void _PostRequestCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        // ...
    }
}

现在我想当backgroundworker线程完成并且_PostRequestCompleted事件执行时，它通知窗体执行了test()方法。

例如，如果frm1执行test()方法在end _PostRequestCompleted()方法通知frm1线程已经完成。例如_PostRequestCompleted在完成线程后执行frm1中的方法。

但是我不知道怎么做??

如何通知窗体在其他类中执行线程

在WebMethods类中声明event并将其注册到您的表单类中

class WebMethods
{
    public event EventHandler PostRequestCompletedEvent;
    private void _PostRequestCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        // ...
        if (PostRequestCompletedEvent != null)
        {
           PostRequestCompletedEvent(this, new EventArgs());
        }
    }
}

现在在您的表单类中注册此事件。

public partial class frm1 : Form
{
    private WebMethods wm;
    public frm1()
    {
        InitializeComponent();
    }

    private void button_Click(object sender, EventArgs e)
    {
        wm = new WebMethods();
        wm.PostRequestCompletedEvent += wm_PostRequestCompletedEvent;
        wm.test();
    }
    void wm_PostRequestCompletedEvent(object sender, EventArgs e)
    {
        // notify frm1 that thread was finished 
    }
}
public partial class frm2 : Form
{
    private WebMethods wm;
    public frm2()
    {
       InitializeComponent();
    }

    private void button_Click(object sender, EventArgs e)
    {
       wm = new WebMethods();
       wm.PostRequestCompletedEvent += wm_PostRequestCompletedEvent;
       wm.test();
    }
    void wm_PostRequestCompletedEvent(object sender, EventArgs e)
    {
        // notify frm2 that thread was finished
    }
}
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