拖放行和分离选项可在C#中拖放单元格

dataGridView1.AllowDrop = true;

private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
{
   if (e.Button == MouseButtons.Left)
   {
      dataGridView1.DoDragDrop(dataGridView1.SelectedCells, DragDropEffects.Copy);
   }
}

private void dataGridView1_DragDrop(object sender, DragEventArgs e)
{
   Point clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y));
   DataGridView.HitTestInfo hitTest = dataGridView1.HitTest(clientPoint.X, clientPoint.Y);
   if (hitTest.Type == DataGridViewHitTestType.Cell)
   {
      DataGridViewCell targetCell = dataGridView1[hitTest.ColumnIndex, hitTest.RowIndex];
      DataGridViewCell[] draggedCells = (DataGridViewCell[])e.Data.GetData(typeof(DataGridViewCell[]));
      foreach (DataGridViewCell cell in draggedCells)
      {
         // 处理拖放操作，将单元格移动到指定位置
      }
   }
}