C# winform 实现(不规则)窗体或者控件的拖动

转的这篇 日志更令我感兴趣的是base的用法和对事件的重写

 

方法一: 窗体或者控件的拖动

   private Point m_MousePoint;
private Point m_LastPoint;

  protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
this.m_LastPoint = this.Location;
this.m_MousePoint = this.PointToScreen(e.Location);
}

protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.Button == MouseButtons.Left)
{
Point t = this.PointToScreen(e.Location);
Point l = this.m_LastPoint;

        l.Offset(t.X - this.m_MousePoint.X, t.Y - this.m_MousePoint.Y);
this.Location = l;
}
}

1 代码直接复制到窗体上就可以使用.

2 可以用到UserControl上,UserControl就成了一个可拖动的控件了

3 可以用到自定义控件上,例如:自定义控件继承了一个Button ,然后写上上面代码,那么这个自定义Button就可以在Form窗体上随处拖动....

 方法二: 不规则窗体拖动

using System.Runtime.InteropServices;

[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_MOVE = 0xF010;
public const int HTCAPTION = 0x0002;

public void ShapedForm_MouseDown(object sender, MouseEventArgs e)
{
ReleaseCapture();
SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}

方法二:比较好 ,能够画出 虚线框,跟Windows的窗体拖动一样...........