cancel MouseDown event in WinForms app

问题

I've several count variables with min and max values. While I press the appropriate buttons the counter goes up or down.

While pressing the lmb and the counter exceeds e.g. 100 (max value) it doesnt stop counting naturally.

Is there a way to check my counter and force the end of the mouse event without watching over it manually?

private void button_RunXPositive_MouseDown(object sender, MouseEventArgs e)
{
    if (X < 100) {
      StartInMode(0, true); // a motor 
      ((Button_Triangle)sender).BackColor = ((Button_Triangle)sender).EdgeColor;
      return;
    }  
    else {
      ((Button_Triangle)sender).BackColor = Color.Black;
      this.MotorStop((UInt32)0);
    }
}

回答1:

If your project is an WPF project then you can write this in your event handler:

if(counter < min || counter > max)
{
    e.Handled = true;
}
//your code

EDIT If you're using Windows Form so you can do this:

private void Form1_MouseDown(object sender, MouseEventArgs e)
{
    if(counter < min || counter > max)
    {
        return;
    }

    //your code
}

来源：https://stackoverflow.com/questions/15763343/cancel-mousedown-event-in-winforms-app