Question

在Visual Studio的设计过程中，WPF窗口背景颜色为白色，但是当我调试应用程序时，它是黑色的。为什么呢？

这是我的.xaml代码：

<Controls:MetroWindow x:Class="XLTT.Views.About"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"

         ShowTitleBar="False"
         WindowStartupLocation="CenterOwner" 
         ShowCloseButton="False"
         ResizeMode="NoResize" 
         WindowStyle="ToolWindow"
         Height="320" 
         Width="400" 
         Title="About" >


<!-- your content here -->
<Grid Margin="20">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition/>
    </Grid.RowDefinitions>

    <TextBlock Name="lblAppName" Margin="10" TextWrapping="Wrap" Text="Application Name :" VerticalAlignment="Stretch" FontSize="24" FontFamily="Segoe UI Light" Foreground="#FFF53800"/>
    <TextBlock Name="lblBuild" Margin="10" TextWrapping="Wrap" Text="Build :" VerticalAlignment="Top" Grid.Row="1" FontSize="16" FontFamily="Segoe UI Light"/>
    <TextBlock Name="lblOwner" Margin="10" TextWrapping="Wrap" Text="Owner :" VerticalAlignment="Top" Grid.Row="2" FontWeight="Bold" FontFamily="Segoe UI Light" FontSize="16" />
    <TextBlock Name="lblLicense" Margin="10" TextWrapping="Wrap" Text="License" VerticalAlignment="Top" Grid.Row="3" FontWeight="Bold" Foreground="#FFEA1818" FontFamily="Segoe UI Light" FontSize="16" />
    <Button Name="btnOk" Content="OK" HorizontalAlignment="Right" Margin="0,0,10,4" VerticalAlignment="Bottom" Width="94" Grid.Row="4" Click="btnOk_Click" Height="40"/>

</Grid>

Colors in designer Colors when running

Answer 1

查看您的App.xaml文件。

如果包含：

<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseDark.xaml" />

将其替换为：

<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />

<强>解释

您的App.xaml是程序的入口点，它将样式设置应用于每个子窗口/页面/控件，但VS Designer通常无法在设计模式下加载所有资源。所以在VS中它将是默认的白色并且在运行应用程序时完全应用样式。

MahApps为Windows使用2个默认style templates：

“BaseLight”，“BaseDark”

<强>测试

当然，如果它不在App.xaml中，您可以在MetroWindow构造函数调试中使用ThemeManager.DetectAppStyle(this);进行检查。

或覆盖App.xaml.cs OnStartup() Methode，如下所示：

public partial class App : Application
{
    protected override void OnStartup (StartupEventArgs e)
    {
        // get the theme from the current application
        var theme = ThemeManager.DetectAppStyle(Application.Current);

        // now set the Green accent and dark theme
        ThemeManager.ChangeAppStyle(Application.Current,
                                    ThemeManager.GetAccent("Blue"),
                                    ThemeManager.GetAppTheme("BaseLight"));

        base.OnStartup(e);
    }
}

<强>更新

在您告诉我们您的应用程序中没有App.xaml入口点后，问题很明显。 MahApps需要一些资源词典，您可以阅读Quick Start Guide。

我认为在你的情况下你只是缺少MahApps的样式。在您的<Controls:MetroWindow>标记后面添加：

<Controls:MetroWindow.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Controls:MetroWindow.Resources>

WPF窗口在VS设计器中的颜色与调试时不同？

1 个答案: