(转)C#下拖动没有边框的窗体

原文：http://topic.csdn.net/t/20020425/15/675744.html

方法一：

using   System;  
  using   System.Windows.Forms;  
  using   System.Drawing;  
  namespace   NetFishApplication  
  {  
          class   MyForm   :   Form  
          {  
                  //   鼠标位移记录器  
                  private   MouseOffsetRecorder   mr   =   new   MouseOffsetRecorder();          
                  //   可拖动标志  
                  private   bool   boolFormDrag   =   false;  
                  public   MyForm()  
                  {  
                          //   设置窗体样式  
                          this.AutoScale   =   false;  
                          this.BackColor   =   System.Drawing.Color.Red;  
                          this.ClientSize   =   new   System.Drawing.Size(140,   50);  
                          this.FormBorderStyle   =   System.Windows.Forms.FormBorderStyle.None;  
                          this.MaximizeBox   =   false;  
                          this.MinimizeBox   =   false;  
                           
                          //   事件关联  
                          this.MouseUp   +=   new   System.Windows.Forms.MouseEventHandler(this.MyForm_OnMouseUp);  
                          this.DoubleClick   +=   new   System.EventHandler(this.MyForm_DBClick);  
                          this.MouseMove   +=   new   System.Windows.Forms.MouseEventHandler(this.MyForm_OnMouseMove);  
                          this.MouseDown   +=   new   System.Windows.Forms.MouseEventHandler(this.MyForm_OnMouseDown);  
                          this.Paint   +=   new   System.Windows.Forms.PaintEventHandler(this.MyForm_OnPaint);  
                  }  
                  static   void   Main()  
                  {  
                          Application.Run(new   MyForm());  
                  }  
                   
                  private   void   MyForm_OnMouseDown(object   sender,         MouseEventArgs   e)  
                  {  
                          if   (e.Button   ==   System.Windows.Forms.MouseButtons.Left)  
                          {  
                                  this.boolFormDrag   =   true;  
                                  mr.Record();  
                          }  
                  }  
                  private   void   MyForm_OnMouseMove(object   sender,         MouseEventArgs   e)  
                  {  
                          if   (   this.boolFormDrag   ==   true)  
                          {  
                                  this.Location   =   new   Point(this.Location.X   +   mr.offsetX,   this.Location.Y   +   mr.offsetY);  
                                  mr.Record();  
                          }  
                  }  
                  private   void   MyForm_OnMouseUp(object   sender,         MouseEventArgs   e)  
                  {  
                          this.boolFormDrag   =   false;  
                  }  
   
                  private   void   MyForm_DBClick(object   sender,   System.EventArgs   e)  
                  {  
                          this.Close();  
                  }  
                           
                  protected   void   MyForm_OnPaint(object   sender,System.Windows.Forms.PaintEventArgs   e)  
                  {  
                          Graphics   g   =   e.Graphics;                                      
                          g.DrawString("Double   Click   To   Exit",this.Font,new   SolidBrush(Color.Black),1,20);  
                  }  
          }  
           
          ///   <summary>  
          ///   记录鼠标在两个动作间的位移  
          ///   </summary>  
          public   class   MouseOffsetRecorder    
          {  
                  private   Point   StartPosition   =   new   Point();  
   
                  //   水平位置上的位移  
                  public   int   offsetX  
                  {  
                          get  
                          {  
                                  return   this.GetCurrentPosition().X   -   this.StartPosition.X;  
                          }  
                  }  
                  //   垂直位置上的位移  
                  public   int   offsetY  
                  {  
                          get  
                          {  
                                  return   this.GetCurrentPosition().Y   -   this.StartPosition.Y;  
                          }  
                  }  
                   
                  public   void   Record()  
                  {  
                          this.StartPosition   =   this.GetCurrentPosition();  
                  }  
                  protected   Point   GetCurrentPosition()  
                  {  
                          return     new   Point(System.Windows.Forms.Cursor.Position.X,   System.Windows.Forms.Cursor.Position.Y);  
                  }  
          }  
  }   

 

方法二：

可以通过在Form窗体的MouseMove和MouseDown事件响应方法中来记录鼠标的位置，并计算出Form窗体的新位置。下面，提供一段示例代码，供您参考：  

  //   记录鼠标在Form窗体上的位置  

private   Point   mouse_offset;  
  ……  
  private   void   Form1_MouseDown(object   sender,   System.Windows.Forms.MouseEventArgs   e)  
  {  
  //   Gets   the   x-coordinate   and   y-coordinate   of   a   mouse   click   based   on   the   the   client   area   of   the   form  
  mouse_offset   =   new   Point(-e.X,   -e.Y);  
  }  
   
  private   void   Form1_MouseMove(object   sender,   System.Windows.Forms.MouseEventArgs   e)  
  {  
  if(e.Button   ==   MouseButtons.Left)  
  {  
  //   Gets   the   position   of   the   mouse   cursor   in   screen   coordinates  
  Point   mousePos   =   Control.MousePosition;  
  //   Translates   this   Point   by   the   specified   amount.  
  mousePos.Offset(mouse_offset.X,   mouse_offset.Y);  
  Location   =   mousePos;  
  }  
  }   

 

没测试，暂时放着，留作备用，嘿嘿