C#拖动控件问题
C#怎么让一个button拖动后top,left不要出去panel1，只能在panel1里面。下面的代码怎么修改？？？？
程序代码：private bool isMove = false;
private int MouseDownX;
private int MouseDownY;
private void lblCode_MouseMove(object sender, MouseEventArgs e)
{
if (isMove)//如果左键按下的话
{
((Button)sender).Location = new Point(((Button)sender).Left + e.X - MouseDownX, ((Button)sender).Top + e.Y - MouseDownY);
}
private void lblCode_MouseDown(object sender, MouseEventArgs e)
{
isMove = true;
MouseDownX = e.X;
MouseDownY = e.Y;
}
private void lblCode_MouseUp(object sender, MouseEventArgs e)
{
isMove = false;
}[ 本帖最后由 宇智波曌 于 2012-5-12 15:49 编辑 ]
