用于检查当前是否编辑了DataGrid的单元格的代码

Question

是否有简单的可能性来检查DataGrid当前是否在EditMode中(无需订阅BeginningEdit和CellEditEnding)

Answer 1

看来你也可以从items视图中获取这些信息,即:

IEditableCollectionView itemsView = stateGrid.Items;
if (itemsView.IsAddingNew || itemsView.IsEditingItem)
{
    stateGrid.CommitEdit(DataGridEditingUnit.Row, true);
}

我还没有确认这一点,但如果你的绑定集合提供IEditableCollectionView,很可能你可以在viewmodel中获得这些标志.

Answer 2

好吧,我还没有找到一个简单的解决方案,没有人指出我.以下代码可用于将附加属性IsInEditMode添加到DataGrid.希望它可以帮助某人:

public class DataGridIsInEditModeTracker {

    public static bool GetIsInEditMode(DataGrid dataGrid) {
        return (bool)dataGrid.GetValue(IsInEditModeProperty);
    }

    private static void SetIsInEditMode(DataGrid dataGrid, bool value) {
        dataGrid.SetValue(IsInEditModePropertyKey, value);
    }

    private static readonly DependencyPropertyKey IsInEditModePropertyKey = DependencyProperty.RegisterAttachedReadOnly("IsInEditMode", typeof(bool), typeof(DataGridIsInEditModeTracker), new UIPropertyMetadata(false));

    public static readonly DependencyProperty IsInEditModeProperty = IsInEditModePropertyKey.DependencyProperty;


    public static bool GetProcessIsInEditMode(DataGrid dataGrid) {
        return (bool)dataGrid.GetValue(ProcessIsInEditModeProperty);
    }

    public static void SetProcessIsInEditMode(DataGrid dataGrid, bool value) {
        dataGrid.SetValue(ProcessIsInEditModeProperty, value);
    }


    public static readonly DependencyProperty ProcessIsInEditModeProperty =
        DependencyProperty.RegisterAttached("ProcessIsInEditMode", typeof(bool), typeof(DataGridIsInEditModeTracker), new FrameworkPropertyMetadata(false, delegate(DependencyObject d,DependencyPropertyChangedEventArgs e) {

            DataGrid dataGrid = d as DataGrid;
            if (null == dataGrid) {
                throw new InvalidOperationException("ProcessIsInEditMode can only be used with instances of the DataGrid-class");
            }
            if ((bool)e.NewValue) {
                dataGrid.BeginningEdit += new EventHandler<DataGridBeginningEditEventArgs>(dataGrid_BeginningEdit);
                dataGrid.CellEditEnding += new EventHandler<DataGridCellEditEndingEventArgs>(dataGrid_CellEditEnding);
            } else {
                dataGrid.BeginningEdit -= new EventHandler<DataGridBeginningEditEventArgs>(dataGrid_BeginningEdit);
                dataGrid.CellEditEnding -= new EventHandler<DataGridCellEditEndingEventArgs>(dataGrid_CellEditEnding);
            }
        }));

    static void dataGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e) {            
        SetIsInEditMode((DataGrid)sender,false);
    }

    static void dataGrid_BeginningEdit(object sender, DataGridBeginningEditEventArgs e) {
        SetIsInEditMode((DataGrid)sender, true);
    }                  
}

要使用它,请在datagrid上将ProcessIsInEditMode-属性设置为true:

<DataGrid local:DataGridIsInEditModeTracker.ProcessIsInEditMode="True" ..  other properties ..>

之后,您将使IsInEditMode属性与DataGrid的模式同步.如果您还需要编辑单元格,请根据需要更改代码BeginningEdit.