wpf - 在最后一个单元格上切换时 WPF DataGrid 失去焦点

Question

我的窗口中有一些按钮和一个数据网格。

<Button>Save</Button>
<Button>Back</Button>
<DataGrid x:Name="data" ItemsSource="{Binding Scores}" />

当我编辑 NewItemPlaceholder-row 时，会在更改第一个值时创建新项目（但没有新的 NewItemPlaceholder-row）。当我编辑最后一个值并使用 Tab 键继续时，会生成一个新行。但是光标移动到保存按钮而不是该新行中的第一个单元格。

我怎样才能将注意力集中在网格上？

为了完整性：我使用 ObservableCollection 作为 ItemsSource。

Answer 1

使用KeyboardNavigation.TabNavigation附加属性：

<DataGrid x:Name="data" 
          ItemsSource="{Binding Scores}" 
          KeyboardNavigation.TabNavigation="Cycle" />

Answer 2

我在这里找到了一个解决方案：Customize focus behavior after a row commit through the DataGrid.RowEditEnding event

private void data_RowEditEnding_1(object sender, DataGridRowEditEndingEventArgs e) {
    if (e.EditAction == DataGridEditAction.Commit) {
        if (e.Row.Item == data.Items[data.Items.Count - 2]) {
            var rowToSelect = data.Items[data.Items.Count - 1];
            int rowIndex = data.Items.IndexOf(rowToSelect);
            this.Dispatcher.BeginInvoke(new DispatcherOperationCallback((param) => {
                var cell = DataGridHelper.GetCell(data, rowIndex, 0);
                cell.Focus();
                data.BeginEdit();
                return null;
            }), DispatcherPriority.Background, new object[] { null });
        }
    }
}

从这里使用 GetCell 和 GetRow 方法：datagrid get cell index

static class DataGridHelper {
    static public DataGridCell GetCell(DataGrid dg, int row, int column) {
        DataGridRow rowContainer = GetRow(dg, row);

        if (rowContainer != null) {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

            // try to get the cell but it may possibly be virtualized
            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            if (cell == null) {
                // now try to bring into view and retreive the cell
                dg.ScrollIntoView(rowContainer, dg.Columns[column]);
                cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            }
            return cell;
        }
        return null;
    }

    static public DataGridRow GetRow(DataGrid dg, int index) {
        DataGridRow row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        if (row == null) {
            // may be virtualized, bring into view and try again
            dg.ScrollIntoView(dg.Items[index]);
            row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        }
        return row;
    }

    static T GetVisualChild<T>(Visual parent) where T : Visual {
        T child = default(T);
        int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < numVisuals; i++) {
            Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
            child = v as T;
            if (child == null) {
                child = GetVisualChild<T>(v);
            }
            if (child != null) {
                break;
            }
        }
        return child;
    }
}

Answer 3

这是另一种打包方式，您可以在默认样式中启用它并在DataGrid整个应用程序中应用它。