c# - 定时器事件 c# Crash

Question

我有一个定时器事件，如下所示，我从 this 得到了一些建议邮政。你能告诉我这有什么问题吗？我遇到以下崩溃:

无法转换 System.Windows.Forms.Timer 类型的对象输入 System.Windows.Forms.Button .
关于我哪里出错的任何建议？

public MainForm()
{
    InitializeComponent();

    ButtonTimer.Tick += new EventHandler(ButtonTimer_Tick);
    ButtonTimer.Interval = 100;
}

private void ButtonTimer_Tick(object sender, EventArgs e)
{
    Button CurrentButton = (Button)sender;

    string PressedButton = CurrentButton.Name;

    switch (PressedButton)
    {
        case "BoomUp":break;
    }
}

private void BoomUp_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        //ButtonTimer.Enabled = true;
        ButtonTimer.Start();
    }

}

private void BoomUp_MouseUp(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        ButtonTimer.Stop();
    }
}

Answer 1

您在 ButtomTime_Tick 中有问题方法 :

   Button CurrentButton = (Button)sender;

sender不是 Button ，这是一个 Timer .

那你现在要做什么？

您可以在类里面添加一个私有(private)字段

private Button currentButton_;

和

private void BoomUp_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        currentButton_ = e.Button;//but I don't know if e.Button has a Name "BoomUp"
        //you can set the name manually if needed :
        currentButton_.Name = "BoomUp";

        //ButtonTimer.Enabled = true;
        ButtonTimer.Start();
    }
}

和

private void ButtonTimer_Tick(object sender, EventArgs e)
{

            switch (currentButton_.Name)
            {
                case "BoomUp":break;
             }
}