dev gridview 单元格值拖拽替换

public class GridViewDropCell
    {
        //dvginfo根据鼠标点击的x、y坐标获取该点的相关信息
        private GridHitInfo downHitInfo;
        private GridHitInfo upHitInfo;

        private GridView _dgv;//表格
        private GridControl _dgvinfo;
        public GridViewDropCell(GridView dgv, GridControl dgvinfo)
        {
            _dgv = dgv;
            _dgvinfo = dgvinfo;
            _dgvinfo.AllowDrop = true; // 确保能够拖拽
        }

        public void MouseDown(MouseEventArgs e)
        {
            downHitInfo = _dgv.CalcHitInfo(new Point(e.X, e.Y));
        }

        public void MouseMove(MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left) return;        //判断是否是左键
            if (downHitInfo == null || downHitInfo.RowHandle < 0) return;   //判断按下的位置是否有值，是否是gridview 的Items. 
            GridCell[] gcs = _dgv.GetSelectedCells();
            _dgvinfo.DoDragDrop(gcs, DragDropEffects.Move);//开始拖放操作。
        }
        //拖拽过程事件     
        public void DragOver(DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
        }
        //拖拽完成后事件  
        public void DragDrop(DragEventArgs e, Point gridviewPoint)
        {
            //获取鼠标在屏幕上的位置。
            //Point gridviewPoint = this.PointToScreen(this._dgvinfo.Location);
            //获取 gridview 中对应的的位置（屏幕位置减去 gridView 开始位置）
            upHitInfo = _dgv.CalcHitInfo(new Point(e.X - gridviewPoint.X, e.Y - gridviewPoint.Y));
            if (upHitInfo == null || upHitInfo.RowHandle < 0) return;
            //获取释放的位置列索引
            int endRow = upHitInfo.RowHandle;
            GridColumn column = upHitInfo.Column;//所在单元格
            GridCell[] cells = e.Data.GetData(typeof(GridCell[])) as GridCell[];//获取要移动的数据
            if (cells != null && cells.Count() > 0)
            {
                _dgv.ClearSelection();
                if (cells.Count() == 1)//只选择一条数据
                {
                    ReplaceACellValue(cells.FirstOrDefault(), endRow, column);
                }
                else if (cells.Where(item => item.Column.Equals(column)).Count() == 0)//选择的都是同一列数据
                {
                    //选择一列当前索引小于选择的索引的数据有多少
                    int cellRow = cells.Where(item => item.RowHandle < endRow).Count();
                    int endcell = endRow - cellRow;
                    foreach (GridCell fc in cells)
                    {
                        ReplaceACellValue(fc, endcell, column);
                        endcell++;
                    }
                }
                else
                { 
                    //两列数据，
                    //当前列选择的在当前索引上的数据有多少
                    int cellRow = cells.Where(item => item.Column.Equals(column) && item.RowHandle < endRow).Count();
                    int endcell = endRow - cellRow;
                    //另一列选择的在当前索引上的数据有多少
                    int cell2Row = cells.Where(item => item.RowHandle < endRow).Count() - cellRow;
                    int end2cell = endRow - cellRow;
                    foreach (GridCell fc in cells)
                    {
                        if (fc.Column.Equals(column))
                        {
                            ReplaceCellValue(fc, endcell);
                            endcell++;
                        }
                        else
                        {
                            ReplaceCellValue(fc, end2cell);
                            end2cell++;
                        }
                    }
                }

            }
            _dgv.RefreshData();
        }
        /// <summary>
        /// 单个单元格替换
        /// </summary>
        /// <param name="cell">选择的单元格</param>
        /// <param name="endRow">替换的单元格索引</param>
        /// <param name="column">替换的单元格列</param>
        private void ReplaceACellValue(GridCell fc, int endRow, GridColumn column)
        {
            object cellvalue = _dgv.GetRowCellValue(fc.RowHandle, fc.Column);
            object value = _dgv.GetRowCellValue(endRow, column);
            _dgv.SetRowCellValue(endRow, column, cellvalue);//选择的数据赋值
            _dgv.SetRowCellValue(fc.RowHandle, fc.Column, value);//替换数据
            _dgv.SelectCell(endRow, column);
        }
        /// <summary>
        /// 替换单元格的值
        /// </summary>
        private void ReplaceCellValue(GridCell fc, int rowindex)
        {
            object cellvalue = _dgv.GetRowCellValue(fc.RowHandle, fc.Column);
            object value = _dgv.GetRowCellValue(rowindex, fc.Column);//当前选中的值
            _dgv.SetRowCellValue(rowindex, fc.Column, cellvalue);//选择的数据赋值
            _dgv.SetRowCellValue(fc.RowHandle, fc.Column, value);//替换数据
            _dgv.SelectCell(rowindex, fc.Column);
        }
    }

效果