c# 实现窗体移动

一般情况下：

 .添加下列代码到你的窗体中：
   #region 轻松移动

 bool isInMove;
   Point oldPoint;

   void InitializeEasyMove()
   {
    isInMove = false;

    this.MouseDown += new MouseEventHandler(EasyMove_MouseDown);
    this.MouseUp += new MouseEventHandler(EasyMove_MouseUp);
    this.MouseMove += new MouseEventHandler(EasyMove_MouseMove);
   }

   void EasyMove_MouseMove(object sender, MouseEventArgs e)
   {
    if (!isInMove) return;
    Point pt = PointToScreen(e.Location);
    if (pt.X == oldPoint.X || pt.Y == oldPoint.Y) return;
    this.Location = new Point(this.Location.X + pt.X - oldPoint.X, this.Location.Y + pt.Y - oldPoint.Y);
    oldPoint = pt;
   }

   void EasyMove_MouseUp(object sender, MouseEventArgs e)
   {
    isInMove = false;
   }

   void EasyMove_MouseDown(object sender, MouseEventArgs e)
   {
    isInMove = true;
    oldPoint = PointToScreen(e.Location);
   }

   #endregion

 .在你的窗体的构造函数或Load事件中调用：
 InitializeEasyMove();

但是你会发现这样很麻烦，运行时也容易出错。

改进一：

增加mouseleave事件，当mouseleave的时候把isInMove 设置成false

这样虽然改进了一点。但是还有有点别扭

改进二：

使用win32api

 public partial class Form6 : Form
     {
         [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 Form6()
         {
             InitializeComponent();
         }

         private void Form6_MouseDown(object sender, MouseEventArgs e)
         {
             ReleaseCapture();
             SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, );
         }
     }

代码量大大减少，直接消除鼠标移快速移动时出现bug的现象。但是当鼠标点击pannel，groupbox等还是没有反应

改进三：

 public partial class Form1 : Form
     {
         [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 Form1()
         {
             InitializeComponent();
             foreach (var item in this.Controls)
             {
                 if ((item as GroupBox) != null)
                 {
                     (item as GroupBox).MouseDown += Form6_MouseDown;
                 }
                 else if ((item as Panel) != null)
                 {
                     (item as Panel).MouseDown += Form6_MouseDown;
                 }
             }
         }

         private void Form6_MouseDown(object sender, MouseEventArgs e)
         {
             ReleaseCapture();
             SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, );
         }
     }

将GroupBox ，pannel等控件添加mousedown动作

ok，大功告成