Question

我有一个只有两列的自定义样式数据网格。第二列是＆＃34; DataGridTemplateColumn＆＃34;使用包含自定义样式文本框和图像的网格。我创建了一个＆＃34; IsValid＆＃34; TextBox中的依赖属性，根据绑定对象的属性值更改其背景颜色和边框画笔。图像通过DataTrigger取决于对象的IsValid属性来更改它的来源

每次用户按下Enter键时，文本框基本上会做一些工作，并将对象中的IsValid属性设置为true，false或null（当然，通过对象中的notifypropertychanged，更改会反映在文本框和图像上）。

现在我的问题：当我在数据网格中显示很多行（介于100和1000之间）时，如果禁用RowVirtualization，则垂直滚动变得非常慢，但如果我将其保留，则生成的新行会出现背景颜色错误，旧版本丢失了更改后的布局

这里是DataGrid的xaml

<DataGrid x:Name="dgData"
          AutoGenerateColumns="False"
          Margin="2"
          IsReadOnly="False"
          ItemsSource="{Binding}"
          SelectionMode="Single"
          CanUserAddRows="False"
          CanUserReorderColumns="False"
          CanUserResizeRows="False"
          Style="{StaticResource dDataGrid2}"
          ScrollViewer.VerticalScrollBarVisibility="Visible"
          ScrollViewer.HorizontalScrollBarVisibility="Disabled"
          MaxHeight="750"
          EnableRowVirtualization="False"
          SelectionChanged="dgData_SelectionChanged"
          Loaded="dgData_Loaded">

  <DataGrid.RowStyle>
    <Style TargetType="{x:Type DataGridRow}"
           BasedOn="{StaticResource dDataGridRow}">
      <EventSetter Event="PreviewMouseLeftButtonUp"
                   Handler="Row_Click" />
    </Style>
  </DataGrid.RowStyle>

  <DataGrid.Columns>
    <DataGridTextColumn Header="{Binding Source={x:Static fields:FieldNameList.ProductCode}}"
                        Binding="{Binding Path=ProductCode}"
                        Width="auto"
                        MinWidth="160"
                        IsReadOnly="True" />
    <DataGridTextColumn Header="{Binding Source={x:Static fields:FieldNameList.Product}}"
                        Binding="{Binding Path=ProductDescription}"
                        Width="*"
                        IsReadOnly="True" />

    <DataGridTemplateColumn Header="Código SNC"
                            Width="120">
      <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
          <Grid Name="gridSNCCode">
            <Grid.ColumnDefinitions>
              <ColumnDefinition />
              <ColumnDefinition Width="auto" />
            </Grid.ColumnDefinitions>


            <txt:DTextBox Grid.Column="0"
                          x:Name="txtSNCCode"
                          PreviewKeyUp="txtSNCCode_PreviewKeyUp"
                          TextChanged="DTextBox_TextChanged"
                          Text="{Binding Path=PHC_CPOC, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                          IsValid="{Binding Path=IsPHC_CPOC_Valid, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                          NumericOnly="True"
                          SelectAllOnFocus="true" />
            <Image Grid.Column="1"
                   Name="imgValidation"
                   Width="16"
                   HorizontalAlignment="Center"
                   VerticalAlignment="Center"
                   Margin="3 0" />
          </Grid>
          <DataTemplate.Triggers>
            <DataTrigger Binding="{Binding Path=IsPHC_CPOC_Valid, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"
                         Value="{x:Null}">
              <Setter TargetName="imgValidation"
                      Property="Visibility"
                      Value="Collapsed" />
              <Setter TargetName="imgValidation"
                      Property="Source"
                      Value="{x:Null}" />
              <Setter TargetName="gridSNCCode"
                      Property="ToolTip"
                      Value="" />
            </DataTrigger>

            <DataTrigger Binding="{Binding Path=IsPHC_CPOC_Valid, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"
                         Value="True">
              <Setter TargetName="imgValidation"
                      Property="Visibility"
                      Value="Visible" />
              <Setter TargetName="imgValidation"
                      Property="Source"
                      Value="pack://application:,,,/SAFT2PHC;component/Resources/Images/Success48.png" />
              <Setter TargetName="gridSNCCode"
                      Property="ToolTip"
                      Value="Código SNC Válido" />
            </DataTrigger>

            <DataTrigger Binding="{Binding Path=IsPHC_CPOC_Valid, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"
                         Value="False">
              <Setter TargetName="imgValidation"
                      Property="Visibility"
                      Value="Visible" />
              <Setter TargetName="imgValidation"
                      Property="Source"
                      Value="pack://application:,,,/SAFT2PHC;component/Resources/Images/delete2-48.png" />
              <Setter TargetName="gridSNCCode"
                      Property="ToolTip"
                      Value="Código SNC Inválido" />
            </DataTrigger>
          </DataTemplate.Triggers>
        </DataTemplate>
      </DataGridTemplateColumn.CellTemplate>
    </DataGridTemplateColumn>
  </DataGrid.Columns>
</DataGrid>

这是c＃代码

public ObservableCollections<ProductObj> Products { get; set; }

public MyWindow(List<ProductObj> products)
{
    InitializeComponent();
    this.Products = new ObservableCollection(products);
    this.dgData.ItemsSource = this.Products;
}

如何获得良好的DataGrid性能并且不会丢失单元格更新布局？

我已尝试使用Items.Refresh（）但它不起作用......

由于

WPF DataGrid虚拟化失去了单元格布局

0 个答案: