鼠标拖放操作

开始拖放，源

 private void moGridView_MouseDown(object sender, MouseEventArgs e)
        {//点击鼠标左键时，记录点击信息
            if (Control.ModifierKeys != Keys.None) return;
            m_GridHitInfo = null;
            GridHitInfo hitInfo = moGridView.CalcHitInfo(new Point(e.X, e.Y));
            if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
            {
                m_GridHitInfo = hitInfo;
            }
        }

        private void moGridView_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left && m_GridHitInfo != null)
            {
                Size dragSize = SystemInformation.DragSize;
                Rectangle dragRect = new Rectangle(new Point(m_GridHitInfo.HitPoint.X - dragSize.Width / 2,
                                                             m_GridHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);
                MOView moView = moGridView.GetRow(m_GridHitInfo.RowHandle) as MOView;

                if (!dragRect.Contains(new Point(e.X, e.Y)) && moView != null)
                {//为拖放设置数据
                    moGridView.GridControl.DoDragDrop(moView, DragDropEffects.Move);
                    DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
                }
            }
        }

结束拖放，接收并处理数据

  private void _mChart_DragDrop(object sender, DragEventArgs e)
        {//拖放完成接收到的数据
            MOView moView = e.Data.GetData(typeof(MOView)) as MOView;
            if (moView != null)
            {
                MessageBox.Show(moView.ProductCode);
            }
        }

        private void _mChart_DragOver(object sender, DragEventArgs e)
        {//拖放时鼠标显示效果
            if (e.Data.GetDataPresent(typeof(MOView)))
            {
                e.Effect = DragDropEffects.Move;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }