手写代码实现窗体的拖动效果

代码

   
     

    
      
    
       
    
      public
    
       
    
      partial
    
       
    
      class
    
       Form1 : Form
 {
 
    
      private
    
       Point oldPoint 
    
      =
    
       
    
      new
    
       Point(
    
      0
    
      ,
    
      0
    
      );
 
    
      public
    
       Form1()
 {
 InitializeComponent();
 }

 
    
      private
    
       
    
      void
    
       linkLabel1_LinkClicked(
    
      object
    
       sender, LinkLabelLinkClickedEventArgs e)
 {
 
    
      this
    
      .Close();
 }

 
    
      private
    
       
    
      void
    
       linkLabel2_MouseDown(
    
      object
    
       sender, MouseEventArgs e)
 {
 oldPoint.X 
    
      =
    
       Cursor.Position.X;
 oldPoint.Y 
    
      =
    
       Cursor.Position.Y;
 }

 
    
      private
    
       
    
      void
    
       linkLabel2_MouseMove(
    
      object
    
       sender, MouseEventArgs e)
 {
 
    
      if
    
       (e.Button 
    
      ==
    
       MouseButtons.Left)
 {
 
    
      int
    
       offset_x 
    
      =
    
       Cursor.Position.X
    
      -
    
      oldPoint.X;
 
    
      int
    
       offset_y 
    
      =
    
       Cursor.Position.Y 
    
      -
    
      oldPoint.Y;
 
    
      this
    
      .Location 
    
      =
    
       
    
      new
    
       Point(
    
      this
    
      .Location.X 
    
      +
    
       offset_x, 
    
      this
    
      .Location.Y 
    
      +
    
       offset_y);
 oldPoint.X 
    
      =
    
       Cursor.Position.X;
 oldPoint.Y 
    
      =
    
       Cursor.Position.Y;
 }
 }
 }