如何使用相同的DataTemplate并绑定到外部动态属性 [英] How to use the same DataTemplate and bind to outside dynamic properties
问题描述
我成功设置了数据网格以支持过滤.我所做的就是创建一个 DataTemplate ，其中包含一个切换按钮和一个弹出窗口，其中弹出窗口带有 TextBox 作为过滤器搜索框.我在< DataGrid.Resources></DataGrid.Resources>
I successfully set up my datagrid to support filtering. All I did was create a DataTemplate that contained a toggle button and a popup window with a TextBox serving as the filter search box. I created two for each column (total of 2) this way in the <DataGrid.Resources></DataGrid.Resources>
这是我的xaml:
<DataTemplate x:Key="FooHeaderTemplate">
<Grid Margin="0, 0, -5, 0">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ContentControl Content="{Binding}" VerticalAlignment="Center"/>
<ToggleButton Name="FooFilterButton"
Grid.Column="1"
Width="25"
Height="25"
Margin="0, 1, 5, 1"
Padding="1, 0" BorderBrush="{x:Null}" Foreground="{x:Null}" Background="{x:Null}">
<ToggleButton.Content>
<Image Stretch="Fill">
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<DataTrigger
Binding="{Binding DataContext.IsFooFilterApplied, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" Value="True">
<Setter Property="Source" Value="/Foo.Bar.FooApplication;component/Resources/filter-applied.png"/>
</DataTrigger>
<DataTrigger
Binding="{Binding DataContext.IsFooFilterApplied, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" Value="False">
<Setter Property="Source" Value="/Foo.Bar.FooApplication;component/Resources/filter-doff.png"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</ToggleButton.Content>
</ToggleButton>
<Popup IsOpen="{Binding ElementName=FooFilterButton, Path=IsChecked}" PlacementTarget="{Binding ElementName=FooFilterButton}" Placement="Left" StaysOpen="False" HorizontalAlignment="Right">
<Border Background="White" Padding="3">
<TextBox Width="300" Text="{Binding DataContext.FooFilterSearchBox, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
</Border>
</Popup>
</Grid>
</DataTemplate>
如您所见，我具有绑定到与特定列相关的 DataTemplate 的唯一属性.我复制了这个 DataTemplate ，并更改了它的名称和属性绑定以适合下一列.
As you can see, I have unique properties bound to this DataTemplate that relates to a particular column. I duplicated this DataTemplate and changed its Name and the property binding to suit the next column.
按目前的样子，它应该像应该的那样工作.我单击过滤器按钮，出现弹出窗口，输入一个字符串值，并且键入时表数据会更新.此外，过滤器按钮的图形会更改以指示何时将过滤器应用于该特定列.
As it stands, it works like it should. I click on the filter buttons and the pop up appears, I enter a string value and the table data updates as I type. What's more, The graphic for the filter button changes to indicate when a filter is applied for that particular column.
问题是我必须重复相同的 DataTemplate .如果只有两列要过滤，但是在具有7列的 DataGrid 中又如何，我需要为每列添加一个过滤器，那我猜很好吗?
The problem is that I had to duplicate the same DataTemplate. I guess its fine if I only have two columns to filter but what about in a DataGrid with 7 columns and I need to add a filter for each?
我的问题是这样:我有什么办法可以只使用一个 DataTemplate ，然后在每列中对其进行修改?
My question is this: is there any way I use just one DataTemplate and then modify it per column?
非常感谢！
推荐答案
我的问题是这样的:我有什么办法可以只使用一个DataTemplate然后在每列中对其进行修改?
My question is this: is there any way I use just one DataTemplate and then modify it per column?
简短的回答:不，至少不是在XAML中.您必须整体定义模板.恐怕您只能继承"绑定以外的所有部分.
Short answer: No, at least not in XAML. You must define a template as a whole. I am afraid you can't "inherit" all parts but the binding.
您可以考虑创建模板以编程方式:
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