主要事件有MouseDown 、MouseMove、还有DragOver、DragDrop

    1. //公共变量,存放要拖拽的对象
    2.         GridHitInfo downHitInfo = null;
    4.         //鼠标按下事件
    5.         private void gridView1_MouseDown( object sender, MouseEventArgs e ) {
    6.             GridView view = sender as GridView;
    7.             downHitInfo = null;
    8.             GridHitInfo hitInfo = view.CalcHitInfo( new Point( e.X, e.Y ) );
    9.             if( Control.ModifierKeys != Keys.None ) return;
    10.             if( e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0 )
    11.                 downHitInfo = hitInfo;
    12.         }
    14.         //鼠标移动事件
    15.         private void gridView1_MouseMove( object sender, MouseEventArgs e ) {
    16.             GridView view = sender as GridView;
    17.             if( e.Button == MouseButtons.Left && downHitInfo != null ) {
    18.                 Size dragSize = SystemInformation.DragSize;
    19.                 Rectangle dragRect = new Rectangle( new Point( downHitInfo.HitPoint.X - dragSize.Width / 2,
    20.                     downHitInfo.HitPoint.Y - dragSize.Height / 2 ), dragSize );
    22.                 if( !dragRect.Contains( new Point( e.X, e.Y ) ) ) {
    23.                     object row = view.GetRow( downHitInfo.RowHandle );
    24.                     view.GridControl.DoDragDrop( row, DragDropEffects.Move );
    25.                     downHitInfo = null;
    26.                     DevExpress.Utils.DXMouseEventArgs.GetMouseArgs( e ).Handled = true;
    27.                 }
    28.             }
    29.         }
    30. //目标控件中也需要实现两个事件及一个属性,分别为DragOver,DragDrop两个事件和AllowDrop属性,代码如下:
    31.         //将对象拖过对象边界时触发
    32.         private void gridControl1_DragOver( object sender, DragEventArgs e ) {
    33.             e.Effect = DragDropEffects.Move;
    34.         }
    36.         //拖放完成后,相关数据的处理,如删除源控件中的ROW及目标控件中新增一行等,略
    37.         private void gridControl1_DragDrop( object sender, DragEventArgs e ) 
    38.         {
    39.             GridControl grid = sender as GridControl;
    40.             GridView view = grid.MainView as GridView;
    41.             GridHitInfo hitInfo = view.CalcHitInfo(grid.PointToClient(new Point(e.X, e.Y)));
    42.             int sourceRow = downHitInfo.RowHandle;
    43.             int targetRow = hitInfo.RowHandle;
    44.             MoveRow(sourceRow, targetRow,chooseFiles);
    45.         }

    GridContorl1需要设置AllowDrop=true

    对于已经绑定好数据源的GridControl，拖拽部分只能通过改变原始DataTable的排列来

    我自己写了一个更改顺序的方法
    之前第三行写的if (sourceRow == targetRow || sourceRow == targetRow + 1) return;
    这样导致了如果目标行是原始资源行的上一个，无法移动，如视频所示，把sourceRow=targetRow+1删掉就好了

    1.  private void MoveRow(int sourceRow, int targetRow,DataTable sourceTable)
    2.         {
    3.             if (sourceRow == targetRow) return;
    4.             GridView view = gridView8;
    5.             GridControl gc = gridControl1;
    6.             //
    7.             sourceTable = UpdateChooseFileLine(sourceRow, targetRow, sourceTable);
    8.             gridControl1.DataSource = sourceTable;
    9.             gridView8.RefreshData();
    11.         }
    12.         private DataTable UpdateChooseFileLine(int sourceRow,int targetRow,DataTable sourceTable)
    13.         {
    14.             DataTable dt = new DataTable();
    15.             dt.Columns.Add("IsChoose", typeof(bool)).SetOrdinal(0);
    16.             dt.Columns.Add("IsOverlayVisible", typeof(bool)).SetOrdinal(1);
    17.             dt.Columns.Add("IsLine", typeof(bool)).SetOrdinal(2);
    18.             dt.Columns.Add("IsLocked", typeof(bool)).SetOrdinal(3);
    19.             dt.Columns.Add("Name");
    20.             for(int j=0;j<sourceTable.Rows.Count;j++)
    21.             {
    22.                 DataRow dr;
    23.                 if(j==targetRow)
    24.                 {
    25.                     dr = dt.NewRow();
    26.                     dr.ItemArray = sourceTable.Rows[sourceRow].ItemArray;
    27.                     Console.WriteLine(dr["Name"].ToString());
    28.                     dt.Rows.Add(dr);
    29.                 }
    30.                 if (j == sourceRow)
    31.                 {
    32.                     continue;
    33.                 }
    34.                 dr = dt.NewRow();
    35.                 dr.ItemArray = sourceTable.Rows[j].ItemArray;
    36.                 dt.Rows.Add(dr);
    38.             }
    40.             return dt;
    41.         }

    效果：拖拽顺序时，放置与目标位置的上一行 20200705_160436.mp4 (2.03MB)