c# - Setter 目标名称无法识别

Question

我是 WPF 的初学者，我尝试使用 DataTrigger 编写 WPF 部分。

这里是所需的逻辑:

If the variable "iBottleCount" >= 10 then make the background of a label green.If the variable "iBottleCount" < 10 then make the background of a label yellow.If the variable "iBottleCount" = 0 then make the background of a label red.

But he can'f find my label with the targed name "StatusColor".

Find the code below:

<DataGridTemplateColumn Header="Status" Width="80" >

<DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
        <Grid>

            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="20" />
                <ColumnDefinition Width="1*" />
            </Grid.ColumnDefinitions>

            <TextBlock x:Name="StatusText" Height="15" HorizontalAlignment="Left" Margin="2,2,2,2" Text="" VerticalAlignment="Top" Grid.Row="0" Grid.Column="1"/>
            <Label x:Name="StatusColor" Content="" Background="green" HorizontalAlignment="Center" Margin="5,5,5,5" VerticalAlignment="Top" Height="10" Width="20" Grid.Row="0" Grid.Column="0"/>
        </Grid>
    </DataTemplate>
</DataGridTemplateColumn.CellTemplate>

<DataGridTemplateColumn.CellStyle>
    <Style TargetType="{x:Type DataGridCell}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding iBottleCount}" Value="=>10">

                <!-- PROBLEM IS IN THIS LINE -->
                <Setter TargetName="StatusColor" Property="Background" Value="Green" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</DataGridTemplateColumn.CellStyle>

</DataGridTemplateColumn>

那么问题出在哪里呢？标签定义在更高的几行。

Answer 1

模板有自己的作用域，无法从外部访问。无论如何，您不能在样式触发器中使用 TargetName，如果您需要更改标签，请向其样式添加触发器。