如何实现按下Button时立即执行函数而非释放后触发Button1_Click

Hey, I get what you're trying to do here—you want your function to run the second the button is pressed down, not when you let go of it. The default Click event does wait for the button release, which is exactly why your current code only triggers when you lift your finger or mouse button.

简单解决方案：改用MouseDown事件 #

Instead of using the Click event, switch to the MouseDown event. This event fires the moment any mouse button presses down on the control. Here's how to adjust your code:

private void Button1_MouseDown(object sender, MouseEventArgs e)
{
    // 可选：仅在左键按下时触发，避免右键或其他按键误操作
    if (e.Button == MouseButtons.Left)
    {
        myFunction();
    }
}

快速设置步骤 #

• Open your form in the designer, select Button1
• Switch to the Events tab (the lightning bolt icon) in the Properties window
• Locate the MouseDown event, double-click it to auto-generate the method skeleton
• Add your myFunction() call (and the left button check if you want to restrict it to left-clicks)

额外说明 #

If you ever need the function to repeat while the button is held down, you'd need to add a Timer component to trigger the function at intervals as long as the button is pressed. But for your current requirement—run once immediately on press—the MouseDown event is perfect.

内容的提问来源于stack exchange，提问作者mrsoliver