Drag and Drop on a DataGridView

最新推荐文章于 2021-07-21 17:52:26 发布

转载最新推荐文章于 2021-07-21 17:52:26 发布 · 1.4k 阅读

文章标签：

#object #properties #null #string

C#/.NET 专栏收录该内容

103 篇文章

订阅专栏

转自博客园

http://www.cnblogs.com/godwar/archive/2008/01/17/1042321.html

Here is a bit of sample code that allows you to drag and drop a cellvalue in a DataGridView (don’t forget to set the AllowDrop property of the DataGridView to true). Notice that you need to translate the X and Y properties of the DragEventArgs first (unlike the X and Y properties of the MouseEventArgs):

  
 
  private 
  void dataGridView1_MouseDown
  (
  object sender, MouseEventArgs e 
  )
  
 
  {
  
  DataGridView.
  HitTestInfo info = 
   this.
  dataGridView1.
  HitTest
  ( e.
  X, e.
  Y
  );
  
  
  if 
  ( info.
  RowIndex !=
  -1 && info.
  ColumnIndex !=
  -1 
  )
  
  
  {
  
   
  Object value = 
  this.
  dataGridView1.
  Rows
  [info.
  RowIndex
  ].
  Cells
  [info.
  ColumnIndex
  ].
  Value;
  
   
  if 
  (  value !=
  null 
  )
  
   
  {
  
    
  this.
  dataGridView1.
  Rows
  [info.
  RowIndex
  ].
  Cells
  [info.
  ColumnIndex
  ].
  Value = 
  null;
  
    
  this.
  DoDragDrop
  ( value, DragDropEffects.
  Move
  );
  
   
  }
  
  
  }
  
 
  }
  
 
  
 
  private 
  void
  dataGridView1_DragDrop
  (
  object sender, DragEventArgs e 
  )
  
 
  {
  
  Point p = 
  this.
  dataGridView1.
  PointToClient
  (
  new Point
  ( e.
  X, e.
  Y
  ) 
  );
  
  DataGridView.
  HitTestInfo info = 
   this.
  dataGridView1.
  HitTest
  ( p.
  X, p.
  Y
  );
  
  
  if 
  ( info.
  RowIndex !=
  -1 && info.
  ColumnIndex !=
  -1 
  )
  
  
  {
  
   
  Object value = 
  (
  Object
  )e.
  Data.
  GetData
  (
  typeof
  (
  string 
  ) 
  );
  
   
  this.
  dataGridView1.
  Rows
  [info.
  RowIndex
  ].
  Cells
  [info.
  ColumnIndex
  ].
  Value = value;
  
  
  }
  
 
  }
  
 
  
 
  private 
  void dataGridView1_DragEnter
  (
  object sender, DragEventArgs e 
  )
  
 
  {
  
  e.
  Effect = DragDropEffects.
  Move;
  
 
  }
 

  兩個DataGridView拖放也是一樣，只要把DragDrop、DragEnter移動到DataGridView2舊可以了，兩個DataGridView需要設定拖放True
 