C# 鼠标拖拉移动窗体控件

///鼠标左键按下移动控件的实现
///本例子新建两个panel1和panel2
///panel1为父级容器
///panel2为panel1的控件
/// <summary>
/// panel1的鼠标移动事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public bool move = false;
public int tempX;
public int tempY;
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern IntPtr SetCapture(IntPtr h);
private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (move)
{
panel2.Left = e.X - tempX;
panel2.Top = e.Y - tempY;
}
}
/// <summary>
/// panel2的鼠标按钮按下
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void panel2_MouseDown(object sender, MouseEventArgs e)
{
SetCapture(panel1.Handle);//panel1俘获鼠标
if (!move)
{
move = true;
tempX = e.X;
tempY =e.Y;
}
else
{
move = false;
}
}
/// <summary>
/// panel1的鼠标按钮弹起
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
move = false;
}