样式不适用于DataTemplates

问题描述：

我正在为资源字典中的两个类创建DatTemplates。我希望能够将统一样式（此处为TextBlock）应用于DataTemplates。但是当我运行应用程序时，我没有看到应用的样式。如果我将样式放在每个datatemplates中，那么我会得到密钥重复错误。我如何做到这一点。

I am creating DatTemplates for two classes in a resource dictionary. I want to be able to apply a uniform style (here for TextBlock) to both the DataTemplates. But when I run the application I do not see the style applied. If I put the styles in each of the datatemplates then I get key duplication error. How do I accomplish this.

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:my="clr-namespace:TestDataTemplateResources">
    
    <ResourceDictionary.MergedDictionaries>
        
        <ResourceDictionary>
            <Style TargetType="TextBlock">
                <Setter Property="Background" Value="Yellow"/>
                <Setter Property="FontStyle" Value="Italic"/>
            </Style>
        </ResourceDictionary>

        <ResourceDictionary>

            <DataTemplate DataType="{x:Type my:PersonClass}">
            
                <Border BorderBrush="Blue" BorderThickness="2">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                       
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>
                        
                        <TextBlock Grid.Column="0" Grid.Row="0" Text="{Binding Name}"/>
                        <TextBlock Grid.Column="0" Grid.Row="1" Text="{Binding Age}"/>


                    </Grid>
                </Border>
            </DataTemplate>

            <DataTemplate DataType="{x:Type my:AddressClass}">

                <Border BorderBrush="Blue" BorderThickness="2">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>

                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>

                        <TextBlock Grid.Column="0" Grid.Row="0" Text="{Binding Street}"/>
                        <TextBlock Grid.Column="0" Grid.Row="1" Text="{Binding Zip}"/>

                    </Grid>
                </Border>
            </DataTemplate>

        </ResourceDictionary>
        
    </ResourceDictionary.MergedDictionaries>
    
</ResourceDictionary>

答

尝试删除MergedDictionaries。只需将样式和两个数据模板放在根ResourceDictionary中。或者至少在同一个单独的合并字典中。

try to remove MergedDictionaries at all. Just place style and both data templates in the root ResourceDictionary. Or at least in the same single merged dictionary.

嗨Irina，我尝试了你的建议并将所有内容放在root resourcedictionary中。但是数据模板仍然没有采用这种风格。

Hi Irina, I tried your suggestion and placed everything in the root resourcedictionary. But still the datatemplates do not pick up the style.

<resourcedictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:my="clr-namespace:TestDataTemplateResources">
    
                     <style targettype="TextBlock">
                        <setter property="Background" value="Yellow" />
                        <setter property="FontStyle" value="Italic" />
                     </style>


            <datatemplate datatype="{x:Type my:PersonClass}">

        
            <border borderbrush="Blue" borderthickness="2">
                    <grid>
                        <grid.columndefinitions>
                            <columndefinition width="Auto" />
                        </grid.columndefinitions>
                       
                        <grid.rowdefinitions>
                            <rowdefinition height="Auto" />
                            <rowdefinition height="Auto" />
                        </grid.rowdefinitions>
                        
                        <textblock grid.column="0" grid.row="0" text="{Binding Name}" />
                        <textblock grid.column="0" grid.row="1" text="{Binding Age}" />


                    </grid>
                </border>
            </datatemplate>

            <datatemplate datatype="{x:Type my:AddressClass}">

                <border borderbrush="Blue" borderthickness="2">
                    <grid>
                        <grid.columndefinitions>
                            <columndefinition width="Auto" />
                        </grid.columndefinitions>

                        <grid.rowdefinitions>
                            <rowdefinition height="Auto" />
                            <rowdefinition height="Auto" />
                        </grid.rowdefinitions>

                        <textblock grid.column="0" grid.row="0" text="{Binding Street}" />
                        <textblock grid.column="0" grid.row="1" text="{Binding Zip}" />

                    </grid>
                </border>
            </datatemplate>
 

    
</resourcedictionary>

样式不适用于DataTemplates

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