网站技术的解决方案,加大网站集约化建设管理,网站建设过程中的收获,WordPress文章设置时间免费DataGrid_Drop事件是在拖放操作中释放拖动的对象时触发的事件。使用VisualTreeHelper.HitTest方法获取鼠标释放位置的目标元素。 循环向上遍历VisualTree#xff0c;直到找到DataGridRow为止。 如果找到DataGridRow#xff0c;则获取其索引。 检查索引是否有效#xff0c;如…DataGrid_Drop事件是在拖放操作中释放拖动的对象时触发的事件。使用VisualTreeHelper.HitTest方法获取鼠标释放位置的目标元素。 循环向上遍历VisualTree直到找到DataGridRow为止。 如果找到DataGridRow则获取其索引。 检查索引是否有效如果无效则返回。 交换CmdButtons列表中的拖拽行与目标行的位置。DragDrop.DoDragDrop方法启动拖动操作 private void DataGrid_Drop(object sender, DragEventArgs e){DataGrid dataGrid sender as DataGrid;int b dataGrid.SelectedIndex;if (dataGrid ! null){Point position e.GetPosition(dataGrid);HitTestResult hitTestResult VisualTreeHelper.HitTest(dataGrid, position);DependencyObject target hitTestResult.VisualHit;while (target ! null !(target is DataGridRow)){target VisualTreeHelper.GetParent(target);}if (target is DataGridRow){DataGridRow row target as DataGridRow;int i row.GetIndex();if (b0 || i 0 || b CmdButtons.Count - 1 || i CmdButtons.Count - 1){return;}CmdButton tmp CmdButtons[b];CmdButtons[b] CmdButtons[i];CmdButtons[i] tmp;}}}private void DataGrid_DragOver(object sender, DragEventArgs e){if (isPressed){ScrollViewer sv GetScrollViewer(sender as DataGrid);var position e.GetPosition(sv);if (position.Y 330){sv.ScrollToVerticalOffset(sv.VerticalOffset 15);}if (position.Y40){sv.ScrollToVerticalOffset(sv.VerticalOffset - 15);}}}private ScrollViewer GetScrollViewer(DataGrid dataGrid){DependencyObject depObject dataGrid;int i 0;while (depObject ! null){if (depObject is ScrollViewer scrollViewer){return scrollViewer;}depObject VisualTreeHelper.GetChild(depObject, 0);}return null;}private void DataGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e){try{if (e.LeftButton MouseButtonState.Pressed){isPressed true;DragDrop.DoDragDrop(sender as DataGrid, new DataGridRow(), DragDropEffects.Move);}if (e.LeftButton MouseButtonState.Released){isPressed false;}}catch (Exception ex){throw;}}
