我最近开始使用 Extended WPF Toolkit 中的 DataGridControl
<Grid x:Name="LayoutRoot" DataContext="{Binding Source={StaticResource SampleDataSource}}">
<xcdg:DataGridControl ItemsSource="{Binding Orders}" SelectionMode="Single" >
<xcdg:DataGridControl.View>
<xcdg:TableflowView FixedColumnCount="1" UseDefaultHeadersFooters="True" ShowRowSelectorPane="False" VerticalGridLineBrush="Green" VerticalGridLineThickness="2" HorizontalGridLineBrush="Purple" HorizontalGridLineThickness="2">
<xcdg:TableflowView.Theme>
<xcdg:ZuneNormalColorTheme/>
</xcdg:TableflowView.Theme>
</xcdg:TableflowView>
</xcdg:DataGridControl.View>
<xcdg:DataGridControl.Columns>
<xcdg:Column FieldName="OrderID" IsMainColumn="True"/>
<xcdg:Column FieldName="ExternalID" />
<xcdg:Column FieldName="CustomerName" />
<xcdg:Column FieldName="Date" />
<xcdg:Column FieldName="Address" />
<xcdg:Column FieldName="Items" Width="*" />
</xcdg:DataGridControl.Columns>
</xcdg:DataGridControl>
</Grid>
没关系，一切正常。然后我添加了样式。
<Style TargetType="{x:Type xcdg:DataGridControl}">
<Setter Property="Background" Value="MediumOrchid"/>
</Style>
Style被应用，一切都再次正常。所以我接下来要做的是CotrolTemplate使用 Expression Blend 创建并将该模板添加到我的样式中。
<Style TargetType="{x:Type xcdg:DataGridControl}">
<Setter Property="Background"
Value="MediumOrchid" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type xcdg:DataGridControl}">
<Grid>
<Border BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}">
<AdornerDecorator x:Name="PART_DragDropAdornerDecorator">
<xcdg:TableViewScrollViewer x:Name="PART_ScrollViewer"
Padding="{TemplateBinding Padding}"
RowSelectorPaneWidth="{Binding (xcdg:DataGridControl.DataGridContext).RowSelectorPaneWidth, RelativeSource={RelativeSource Self}}"
ShowRowSelectorPane="{Binding (xcdg:DataGridControl.DataGridContext).ShowRowSelectorPane, RelativeSource={RelativeSource Self}}">
<xcdg:TableflowViewItemsHost />
</xcdg:TableViewScrollViewer>
</AdornerDecorator>
</Border>
<Grid x:Name="connectionStateGrid"
HorizontalAlignment="Right"
Height="30"
Margin="0,0,25,25"
VerticalAlignment="Bottom"
Width="30">
<ContentPresenter x:Name="connectionStateLoadingContentPresenter"
ContentTemplate="{Binding (xcdg:DataGridControl.DataGridContext).ConnectionStateLoadingGlyph, RelativeSource={RelativeSource Self}}"
Content="{TemplateBinding ConnectionState}"
Visibility="Collapsed" />
<ContentPresenter x:Name="connectionStateCommittingContentPresenter"
ContentTemplate="{Binding (xcdg:DataGridControl.DataGridContext).ConnectionStateCommittingGlyph, RelativeSource={RelativeSource Self}}"
Content="{TemplateBinding ConnectionState}"
Visibility="Collapsed" />
<ContentPresenter x:Name="connectionStateErrorContentPresenter"
ContentTemplate="{Binding (xcdg:DataGridControl.DataGridContext).ConnectionStateErrorGlyph, RelativeSource={RelativeSource Self}}"
Content="{TemplateBinding ConnectionState}"
Visibility="Collapsed" />
</Grid>
</Grid>
<ControlTemplate.Triggers>
<DataTrigger Binding="{Binding (xcdg:DataGridControl.DataGridContext).IsConnectionStateGlyphEnabled, RelativeSource={RelativeSource Self}}"
Value="False">
<Setter Property="Visibility"
TargetName="connectionStateGrid"
Value="Collapsed" />
</DataTrigger>
<DataTrigger Binding="{Binding (xcdg:DataGridControl.DataGridContext).DataGridControl.ConnectionState, RelativeSource={RelativeSource Self}}"
Value="Loading">
<Setter Property="Visibility"
TargetName="connectionStateLoadingContentPresenter"
Value="Visible" />
<Setter Property="Visibility"
TargetName="connectionStateErrorContentPresenter"
Value="Collapsed" />
<Setter Property="Visibility"
TargetName="connectionStateCommittingContentPresenter"
Value="Collapsed" />
</DataTrigger>
<DataTrigger Binding="{Binding (xcdg:DataGridControl.DataGridContext).DataGridControl.ConnectionState, RelativeSource={RelativeSource Self}}"
Value="Committing">
<Setter Property="Visibility"
TargetName="connectionStateLoadingContentPresenter"
Value="Collapsed" />
<Setter Property="Visibility"
TargetName="connectionStateErrorContentPresenter"
Value="Collapsed" />
<Setter Property="Visibility"
TargetName="connectionStateCommittingContentPresenter"
Value="Visible" />
</DataTrigger>
<DataTrigger Binding="{Binding (xcdg:DataGridControl.DataGridContext).DataGridControl.ConnectionState, RelativeSource={RelativeSource Self}}"
Value="Error">
<Setter Property="Visibility"
TargetName="connectionStateLoadingContentPresenter"
Value="Collapsed" />
<Setter Property="Visibility"
TargetName="connectionStateErrorContentPresenter"
Value="Visible" />
<Setter Property="Visibility"
TargetName="connectionStateCommittingContentPresenter"
Value="Collapsed" />
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
但是现在整个ControlTemplate都加了下划线，上面写着
前缀“xcdg”不映射到命名空间。
有
xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
在我的资源字典和窗口中。此外，xaml 设计器在放置“DataGridControl”的“MainWindow.xaml”中引发异常。它是
ArgumentException：“{DependencyProperty.UnsetValue}”不是 Setter 上“System.Windows.Controls.Control.Template”属性的有效值。
在运行时它工作正常。一切都发生在我添加ControlTemplate到Styleof之后DataGridControl。任何解释为什么会发生这种情况或如何避免这种情况都将受到高度赞赏。