c# - 我无法使用 Prism 将 ContentControl 设为一个区域

Question

我正在构建一个 prism 应用程序，我已经使用 MahApps 的 hamburgermenu 设置了 shell。在那个 Hamburgermenu 的内容中，我想要一个区域。

但是当我尝试从“Hamburgermenu.Content”中的 ContentControl 中创建一个区域时，该区域没有被添加。 但是，如果我尝试在 Hamburgermenu 控件之外的 ContentControl 中创建一个区域，它会完美运行。

    <Controls:MetroWindow x:Class="SystemCreator.ClientApplication.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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SystemCreator.ClientApplication"
        xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
        xmlns:iconPacks="http://metro.mahapps.com/winfx/xaml/iconpacks"
        xmlns:converters="http://metro.mahapps.com/winfx/xaml/shared"
        xmlns:prism="http://prismlibrary.com/"
        xmlns:inf="clr-namespace:SystemCreator.ClientApplication.Infrastructure;assembly=SystemCreator.ClientApplication.Infrastructure"
        xmlns:cdviews="clr-namespace:SystemCreator.CreateDatabase;assembly=SystemCreator.CreateDatabase"
        xmlns:test="clr-namespace:TestModule;assembly=TestModule"
        prism:ViewModelLocator.AutoWireViewModel="True"
        mc:Ignorable="d"
        Title="{Binding Title}" Height="450" Width="800">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Themes/HamburgerMenuTemplate.xaml" />
            </ResourceDictionary.MergedDictionaries>
            <Style x:Key="MahApps.Metro.Styles.HamburgerMenu" TargetType="{x:Type Controls:HamburgerMenu}">
                <Setter Property="FocusVisualStyle" Value="{x:Null}" />
                <Setter Property="Focusable" Value="False" />
                <Setter Property="HamburgerMenuTemplate">
                    <Setter.Value>
                        <DataTemplate>
                            <!--  PackIconMaterial - Menu  -->
                            <ContentControl Width="22"
                                    Height="22"
                                    Content="M3,6H21V8H3V6M3,11H21V13H3V11M3,16H21V18H3V16Z"
                                    Style="{DynamicResource PathIconContentControlStyle}" />
                        </DataTemplate>
                    </Setter.Value>
                </Setter>
                <Setter Property="HorizontalAlignment" Value="Stretch" />
                <Setter Property="ItemContainerStyle" Value="{StaticResource HamburgerMenuItemStyle}" />
                <Setter Property="KeyboardNavigation.ControlTabNavigation" Value="Local" />
                <Setter Property="KeyboardNavigation.DirectionalNavigation" Value="Local" />
                <Setter Property="KeyboardNavigation.TabNavigation" Value="Local" />
                <Setter Property="OptionsItemContainerStyle" Value="{StaticResource HamburgerMenuItemStyle}" />
                <Setter Property="PaneBackground" Value="{DynamicResource MahApps.Metro.HamburgerMenu.PaneBackgroundBrush}" />
                <Setter Property="PaneForeground" Value="{DynamicResource MahApps.Metro.HamburgerMenu.PaneForegroundBrush}" />
                <Setter Property="Template" Value="{StaticResource HamburgerMenuTemplate}" />
                <Setter Property="VerticalContentAlignment" Value="Stretch" />
            </Style>
            <DataTemplate x:Key="MenuItemTemplate" DataType="{x:Type 
    Controls:HamburgerMenuIconItem}">
                <Grid Height="48">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="48" />
                        <ColumnDefinition />
                    </Grid.ColumnDefinitions>
                    <ContentControl Grid.Column="0"
                                    HorizontalAlignment="Center"
                                    VerticalAlignment="Center"
                                    Content="{Binding Icon}"
                                    Focusable="False"
                                    IsTabStop="False" />
                    <TextBlock Grid.Column="1"
                               VerticalAlignment="Center"
                               FontSize="16"
                               Text="{Binding Label}" />
                </Grid>
            </DataTemplate>
        </ResourceDictionary>
    </Window.Resources>
<Controls:HamburgerMenu x:Name="HamburgerMenuControl"
                                Grid.Column="0"
                                Grid.ColumnSpan="2"
                                Grid.Row="1"
                                HamburgerWidth="48"

                                DisplayMode="CompactInline"
                                VerticalScrollBarOnLeftSide="False"
                                ItemTemplate="{StaticResource MenuItemTemplate}"
                                OptionsItemTemplate="{StaticResource MenuItemTemplate}"
                                Style="{StaticResource MahApps.Metro.Styles.HamburgerMenu}"

                                Width="Auto"
                                >
            <Controls:HamburgerMenu.HamburgerMenuHeaderTemplate>
                <DataTemplate>
                    <TextBlock HorizontalAlignment="Center"
                                   VerticalAlignment="Center"
                                   FontSize="16"
                                   Foreground="White"
                                   Text="Menu" />
                </DataTemplate>
            </Controls:HamburgerMenu.HamburgerMenuHeaderTemplate>
            <!--Content-->
            <Controls:HamburgerMenu.Content>
                <ContentControl prism:RegionManager.RegionName="{x:Static inf:ApplicationConstants.MainContent}" />
            </Controls:HamburgerMenu.Content>
        </Controls:HamburgerMenu>
        </Grid>
    </Controls:MetroWindow>

由于在 Hamburgermenu 内未添加该区域，因此导航无法正常工作。有人知道我可能做错了什么吗？

Answer 1

附加属性 ( RegionManager.RegionName ) 仅适用于立即创建的控件。延迟创建的控件将不会被检测到，因为区域管理器已经完成了对区域的查找。

您需要手动添加区域，在菜单的后面的代码(构造函数)中，如下所示:

RegionManager.SetRegionName( theNameOfTheContentControlInsideTheMenu, WellKnownRegionNames.MenuRegion );
RegionManager.SetRegionManager( theNameOfTheContentControlInsideTheMenu, theRegionManager );

您必须为托管该区域的内容控件分配一个名称，并以某种方式获取区域管理器 ( ServiceLocator.Current.GetInstance<IRegionManager>())。