Question

我的DataGrid中有可编辑的单元格，我需要创建＆＃34; 撤消更改＆＃34;按钮，将原始值设置为单元格 TextBlock 。

我在更改TextBlock的值后更改颜色

点击＆＃34;撤消更改＆＃34;按键

现在有预期值

但点击单元格后，有意外＆＃34; 新＆＃34;值

DataGridCell是否有可能两个不同的 TextBlocks（或TextBoxes）？如果是这样，为什么有可能，其中一个重写另一个？

以下是我执行代码的部分内容＆＃34;撤消更改＆＃34;

private void ContextMenuDeleteItemClick(object sender, RoutedEventArgs e)
{
  var cellInfo = this.CurrentCell;
  this.ScrollIntoView(cellInfo.Item);
  var row = this.ItemContainerGenerator.ContainerFromItem(cellInfo.Item) as DataGridRow;
  if (row != null)
  {
    FrameworkElement element = cellInfo.Column.GetCellContent(cellInfo.Item);
    KeyValuePair<DataGridColumn, DataGridRow> key = new KeyValuePair<DataGridColumn, DataGridRow>(cellInfo.Column, row);
    if (originalCellValues.ContainsKey(key))
    {   
      ((element.Parent as DataGridCell).Content as TextBlock).Text = originalCellValues[key];
      (element.Parent as DataGridCell).Style = (element.Parent as DataGridCell).Column.CellStyle;
    }
  }
}

当我尝试在调试时捕获此行为时，在我的 OnBeginningEdit 中值很好，然后突然在 OnCellEditEnding 值出现意外

在我的OnBeginningEdit中，我保存原始值

protected override void OnBeginningEdit(DataGridBeginningEditEventArgs e)
{
  if (!this.editableColumns[e.Column.DisplayIndex])
  {
    if (!e.Row.IsNewItem)
    {
      e.Cancel = true;
    }
  }

  FrameworkElement element = e.Column.GetCellContent(e.Row);
  KeyValuePair<DataGridColumn, DataGridRow> key = new KeyValuePair<DataGridColumn, DataGridRow>(e.Column, e.Row);
  if (!originalCellValues.ContainsKey(key))
  {
    originalCellValues.Add(key, ((element.Parent as DataGridCell).Content as TextBlock).Text);
  }
}

在我的OnCellEditEnding中，我改变了单元格的样式 - 如果编辑了颜色单元格

protected override void OnCellEditEnding(DataGridCellEditEndingEventArgs e)
{
  if ((e.EditingElement as TextBox).Text != originalCellValues[new KeyValuePair<DataGridColumn, DataGridRow>(e.Column, e.Row)])
  {
    FrameworkElement element = e.Column.GetCellContent(e.Row);
    (element.Parent as DataGridCell).Style = CreateStyle("RequiredColor", e.Column.CellStyle);
   }
  else
  {
    FrameworkElement element = e.Column.GetCellContent(e.Row);
    (element.Parent as DataGridCell).Style = e.Column.CellStyle;
  }
}

Answer 1

我找到了解决方案。我添加了Mode = TwoWay，其中我绑定了TextBlock值的属性。默认情况下它的行为就像是TwoWay，但在这种情况下不行。真的很奇怪。

<Controls:FilterableDataGrid Grid.Row="1" 
                    ItemsSource="{Binding GarantList, UpdateSourceTrigger=PropertyChanged}"
                    AutoGenerateColumns="False"
                    CanUserAddRows="True"
                    CanUserDeleteRows="True"
                    CanUserReorderColumns="True"
                    CanUserResizeColumns="True"
                    CanUserResizeRows="False"
                    CanUserSortColumns="True"
                    HeadersVisibility="Column"
                    SelectionUnit="CellOrRowHeader"
                    SelectedRow="{Binding ActualRow, Mode=TwoWay}"
                    ScrollViewer.CanContentScroll="True"
                    AlternatingRowBackground="{StaticResource AlternatingRowBackground}"
                    UserContextMenu="{Binding DataGridContextMenu}"
                    IsSaveChanges="{Binding IsSaveChanges, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
            <Controls:FilterableDataGrid.Columns>
              <DataGridTemplateColumn x:Name="Column1" Width="{StaticResource CheckColumnWidth}" Header="{x:Static localization:Resources.Label_ColumnCheck}" CellStyle="{StaticResource CheckColumnStyle}"/>
              <Controls:DataGridTextColumn x:Name="Column2" Header="{x:Static localization:Resources.Label_Identifikace}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource C_SPStyle}" Binding="{Binding GEx}" SortMemberPath="GEx" IsEditable="False" />
              <Controls:DataGridTextColumn x:Name="Column3" Header="{x:Static localization:Resources.Label_IndAktiv}" Width="{StaticResource IndicationColumnWidth}" CellStyle="{StaticResource IndicationColumnStyle}" Binding="{Binding IndAktiv}" IsEditable="True" />
              <Controls:DataGridTextColumn x:Name="Column4" Header="{x:Static localization:Resources.Label_Jmeno}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding JmenoUz, Mode=TwoWay}" IsEditable="True" />
              <Controls:DataGridTextColumn x:Name="Column5" Header="{x:Static localization:Resources.Label_Telefon}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding TlfUz, Mode=TwoWay}" IsEditable="True" />
              <Controls:DataGridTextColumn x:Name="Column6" Header="{x:Static localization:Resources.Label_Mobil}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding MobilUz}" IsEditable="True" />
              <Controls:DataGridTextColumn x:Name="Column7" Header="{x:Static localization:Resources.Label_Mail}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding MailUz}" IsEditable="True" />
              <Controls:DataGridTextColumn x:Name="Column8" Header="{x:Static localization:Resources.Label_PristupovaUroven}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding CPu}" IsEditable="True" />
            </Controls:FilterableDataGrid.Columns>
          </Controls:FilterableDataGrid>

这里是绑定：

<Controls:DataGridTextColumn x:Name="Column5" Header="{x:Static localization:Resources.Label_Telefon}" Width="{StaticResource ShortTextColumnWidth}" CellStyle="{StaticResource ShortTextColumnStyle}" Binding="{Binding TlfUz, Mode=TwoWay}" IsEditable="True" />

在＆＃34;撤消更改＆＃34;之后，DataGridCell中的内部TextBlock（TextBox）中出现意外行为

1 个答案: