工具栏中的标签前景

Question

我的 WPF 窗口中有一个工具栏，如下所示，请帮助我在后面的代码中动态更改标签前景色。 谢谢...

 <DockPanel Height="60" VerticalAlignment="Top">
            <ToolBar Name="MyToolBar" DockPanel.Dock="Top" Height="60" VerticalAlignment="Top" FlowDirection="RightToLeft"
                     FontFamily="Calibri" FontSize="16" FontWeight="Bold" Background="#FFEEF5FD" Foreground="Black"              ScrollViewer.VerticalScrollBarVisibility="Disabled">
               
                <Button Name="BtnSubmit" Style="{DynamicResource TStyle}" Click="BtnSubmit_Click" Tag="New" Height="52" Width="60"
                        IsDefault="True" Margin="0,0,0,1">
                    <StackPanel Margin="0" Height="54"  
                        <Image Source="/Img/Save 04.png" Height="25" Margin="16,0"/>
                        <Label Content="Save" Margin="0,0,0,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"
                               HorizontalAlignment="Center" VerticalAlignment="Center"/>
                    </StackPanel>
                </Button>
                               
                <Button Name="BtnApply" Style="{DynamicResource TStyle}" Click="BtnApply_Click" Tag="New" Height="52"
                        IsDefault="True" Margin="0,1,0,2" Width="85">
                    <StackPanel Margin="0" Height="52" Width="82">
                        <Image Source="/Img/ApplyIcon.png" Height="25" Margin="29,0,26,0"/>
                        <Label Content="Edit" Margin="-15,0,-23,0" HorizontalContentAlignment="Center"                                             VerticalContentAlignment="Center"
                               HorizontalAlignment="Center" VerticalAlignment="Center"/>
                    </StackPanel>
                </Button>
               
            </ToolBar>
        </DockPanel>

Answer 1

要更改所有TextBlock 元素中的Foreground，您必须定义一个Brush 资源并使用{DynamicResource} 将其分配给所有相关的TextBlock 元素：

MainWindow.xaml

<Window>
  <Window.Resources>
    <SolidColorBrush x:Key="ButtonLabelForegroundBrush" Color="Black" />
  </Window.Resources>

  <DockPanel>
    <ToolBar>
      <Button>
        <TextBlock Foreground="{DynamicResource ButtonLabelForegroundBrush}" />
      </Button>
    </ToolBar>
  </DockPanel>
</Window>

MainWindow.xaml.cs

private void ChangeTextBlockForeground()
{
  var brush = FindResource("ButtonLabelForegroundBrush") as SolidColorBrush;
  brush.Color = Colors.Red;
}