private BindingList<T> DataSource;
//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 void frmToExcelModel_Load(object sender, EventArgs e)

        {

            Init();

            dvginfo.AllowDrop = true; // 确保能够拖拽
            DataSource = new BindingList<T>(); 
            dvginfo.DataSource =DataSource; 

        }

private void gridView1_CustomDrawRowIndicator(object sender, DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e)

        {

            e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Far;

            if (e.Info.IsRowIndicator)

            {

                if (e.RowHandle >= )

                {

                    e.Info.DisplayText = (e.RowHandle + ).ToString();

                }

                else if (e.RowHandle <  && e.RowHandle > -)

                {

                    e.Info.Appearance.BackColor = System.Drawing.Color.AntiqueWhite;

                    e.Info.DisplayText = "G" + e.RowHandle.ToString();

                }

            }

        }

 #region 数据源拖拽

        private void dvginfo_MouseDown(object sender, MouseEventArgs e)

        {

            downHitInfo = gridView1.CalcHitInfo(new Point(e.X, e.Y));

        }

        private void dvginfo_MouseMove(object sender, MouseEventArgs e)

        {

            if (e.Button != MouseButtons.Left) return;        //判断是否是左键

            if (downHitInfo == null || downHitInfo.RowHandle < ) return;   //判断按下的位置是否有值，是否是gridview 的Items.

            int[] rows = gridView1.GetSelectedRows();

            List<ColunmData> linemodels = new List<ColunmData>();

            foreach (int r in rows)   // 获取gridview 数据源中对应的信息。

            {

                //根据 gridview 中的行索引获取数据源中对应的是行索引

                int dataSourcerows = gridView1.GetDataSourceRowIndex(r);

                linemodels.Add(DataSouse[dataSourcerows]);

            }

            dvginfo.DoDragDrop(linemodels, DragDropEffects.Move);//开始拖放操作。

        }

        //拖拽过程事件

        private void dvginfo_DragOver(object sender, DragEventArgs e)

        {

            e.Effect = DragDropEffects.Move;

        }

        //拖拽完成后事件

        private void dvginfo_DragDrop(object sender, DragEventArgs e)

        {

            //获取鼠标在屏幕上的位置。

            Point gridviewPoint = this.PointToScreen(this.dvginfo.Location);

            //获取 gridview 中对应的的位置（屏幕位置减去 gridView 开始位置）

            upHitInfo = gridView1.CalcHitInfo(new Point(e.X - gridviewPoint.X, e.Y - gridviewPoint.Y));

            if (upHitInfo == null || upHitInfo.RowHandle < ) return;

            //获取释放的位置列索引

            int endRow = gridView1.GetDataSourceRowIndex(gridView1.GetDataSourceRowIndex(upHitInfo.RowHandle));

            List<ColunmData> row = e.Data.GetData(typeof(List<ColunmData>)) as List<ColunmData>;  //获取要移动的数据

            if (row != null && row.Count > ) //没有移动的数据跳过

            {

                int a;

                //获取移动列集合的第一列在数据源的索引

                int startRow = DataSouse.IndexOf(row[]);

                ColunmData xs = DataSouse[endRow];

                if (!row.Contains(xs))  //如果多选的话，确保不能拖拽到这几个里

                {

                    gridView1.ClearSelection();

                    //排序，先删除后后添加，

                    for (int i = ; i < row.Count; i++)

                        DataSouse.Remove(row[i]);

                    //若果往上托，则加在鼠标到达行的上面

                    //如果往下拖，则加在鼠标到达行的下面

                    if (startRow > endRow)

                        a = DataSouse.IndexOf(xs);

                    else

                        a = DataSouse.IndexOf(xs) + ;

                    for (int i = ; i < row.Count; i++)

                    {

                        DataSouse.Insert(a + i, row[i]);

                        gridView1.SelectRow(a + i);

                    }

                    gridView1.FocusedRowHandle = a;

                }

            }

            dvginfo.DataSource = DataSouse;

            gridView1.RefreshData();

        }

        #endregion