WinUI 3 無法正確更改標題欄的背景顏色

Question

我的目標是使標題欄的背景顏色和應用程序內的內容顏色相同，但這是行不通的。

我想把所有東西都變成這種顏色#FF2B2B2B，問題是雖然應用程序的內容顏色正確，但標題欄的顏色比應該的顏色淺，事實上默認的 XAML 顏色也會出現同樣的問題黑色，但使用默認的 XAML 紅色一切正常。

主窗口.xaml

<Window
x:Class="TItleBarBackground.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:TItleBarBackground"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">

<Grid>
    <Grid.Resources>
        <SolidColorBrush x:Key="Colour" Color="#FF2B2B2B"/>
    </Grid.Resources>
    <Grid x:Name="AppTitleBar" Height="28" HorizontalAlignment="Stretch" VerticalAlignment="Top" Background="{StaticResource Colour}">
        <TextBlock Text="Title"/>
    </Grid>

    <Rectangle Fill="{StaticResource Colour}" Margin="0,40,0,0" />
</Grid>

MainWindow.xaml.cs

using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Controls.Primitives;
using Microsoft.UI.Xaml.Data;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Navigation;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;

// To learn more about WinUI, the WinUI project structure,
// and more about our project templates, see: http://aka.ms/winui-project-info.

namespace TItleBarBackground
{
    /// <summary>
    /// An empty window that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainWindow : Window
    {
        public MainWindow()
        {
            this.InitializeComponent();
            ExtendsContentIntoTitleBar = true;
            SetTitleBar(AppTitleBar);
        }
    }
}

Answer 1

不幸的是，目前存在一個已知問題（錯誤）。

當他們解決問題時，您需要覆蓋這些：

• WindowCaptionBackground
• WindowCaptionBackgroundDisabled

這是代碼。

申請.xaml

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
            <!-- Other merged dictionaries here -->
        </ResourceDictionary.MergedDictionaries>
        <!-- Other app resources here -->
        <Color x:Key="AppCommonBackground">#FF2B2B2B</Color>
        <SolidColorBrush x:Key="WindowCaptionBackground" Color="{StaticResource AppCommonBackground}"/>
        <SolidColorBrush x:Key="WindowCaptionBackgroundDisabled" Color="{StaticResource AppCommonBackground}"/>
    </ResourceDictionary>
</Application.Resources>

主窗口.xaml

<Window
    x:Class="TitleBars.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="using:TitleBars"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid RowDefinitions="Auto,*" Background="{StaticResource AppCommonBackground}">
        <Grid
            x:Name="AppTitleBar"
            Grid.Row="0"
            Height="28"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Top"
            Canvas.ZIndex="1">
            <TextBlock Text="Title" />
        </Grid>
        <TextBlock
            Grid.Row="1"
            Text="Body" />
    </Grid>
</Window>