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                                  • Hey DX,

                                    I'm new to the TileView of the grid control suite.
                                    Im using it in Kanban mode.

                                    After enabling OptionsView.AllowDrag, i can click on a tile and start moving it.
                                    As soon as I drop a tile into a new column i get a null reference exception :

                                    [C#]
                                    Object reference not set to an instance of an object. at DevExpress.XtraGrid.Views.Tile.ViewInfo.TileViewInfoScrollable.ScrollToItem(Int32 rowHandle, Boolean alignNear) at DevExpress.XtraGrid.Views.Tile.ViewInfo.TileViewInfoCore.OnFocusedRowHandleChanged(Int32 prevHandle, Int32 newHandle) at DevExpress.Data.BaseGridController.OnCurrentControllerRowChanged() at DevExpress.XtraGrid.Views.Tile.TileView.DoChangeFocusedRow(Int32 currentRowHandle, Int32 newRowHandle, Boolean raiseUpdateCurrentRow) at DevExpress.XtraGrid.Views.Base.ColumnView.DoChangeFocusedRowInternal(Int32 newRowHandle, Boolean updateCurrentRow) at DevExpress.XtraGrid.Views.Tile.TileViewDragManager.OnDragAndDropCompleted(BeforeItemDropEventArgs dragArgs) at DevExpress.XtraGrid.Views.Tile.TileViewDragManager.EndItemDrag(TileViewDragInfo dragInfo) at DevExpress.XtraGrid.Views.Tile.TileViewDragManager.EndDrag() at DevExpress.XtraGrid.Dragging.DragController.EndDrag(MouseEventArgs e) at DevExpress.XtraGrid.GridControl.OnMouseUp(MouseEventArgs ev) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at DevExpress.XtraEditors.Container.EditorContainer.WndProc(Message& m) at DevExpress.XtraGrid.GridControl.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
                                • Maxim L (DevExpress Support) 08.14.2019

                                  Hi,
                                  Thank you for sharing your call stack.
                                  However, it isn't sufficient to provide you with an answer as to why the issue occurs.
                                  Could you please isolate it in a small compilable project and share it with us? It will help us find the cause faster.

                                • Customer66682 08.19.2019

                                  Hi,

                                  This happened only a few times and then seemed to stop.
                                  A bit weird and a little worrying.

                                  If it does happen again, i will attempt to reproduce it in an example.
                                  Thanks

                                • Maxim L (DevExpress Support) 08.19.2019

                                  Thank you for keeping us posted.
                                  Sure, if you can reproduce this again feel free to send us a sample.

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