如何在同一窗口中打开另一个XAML文件？

Question

我是C＃的新手开发人员，遇到了无法解决的问题。 我想使用标签上的click事件定向到另一个xaml文件。但是如何在不打开新窗口的情况下显示multiplayer.xaml。

第一个代码是gameMenu.xaml代码，第二个代码是gameMenu.xaml.cs，第三个代码是multiPlayer.xaml

gameMenu.xaml

Window x:Class="menu.gameMenu"
        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:menu"
        mc:Ignorable="d"
        Title="Menu | Memory Game" Height="450" Width="800">

    <!--Screen Layout-->
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="1*" />
            <ColumnDefinition Width="1.5*" />
            <ColumnDefinition Width="1*" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="0.25*" />
            <RowDefinition Height="1*" />
            <RowDefinition Height="0.25*" />
        </Grid.RowDefinitions>

        <!--Menu Title-->
        <TextBlock Grid.Column="1" Grid.Row="1" Text="Memory Game" FontWeight="Bold" TextAlignment="Center" Margin="0 10"></TextBlock>

        <!--Menu Items-->
        <StackPanel Grid.Column="1" Grid.Row="1" VerticalAlignment="Center">
            <Label Name="singlePlayer" Grid.Column="1" Grid.Row="1" HorizontalContentAlignment="Center" MouseLeftButtonUp="singlePlayer_Click" Content="Single Player"></Label>
            <Label Name="multiPlayer" Grid.Column="1" Grid.Row="1" HorizontalContentAlignment="Center" MouseLeftButtonUp="multiPlayer_Click" Content="Multi Player"></Label>
            <Label Name="highScores" Grid.Column="1" Grid.Row="1" HorizontalContentAlignment="Center" MouseLeftButtonUp="highScores_Click" Content="High Scores"></Label>
            <Label Name="features" Grid.Column="1" Grid.Row="1" HorizontalContentAlignment="Center" MouseLeftButtonUp="features_Click" Content="Features"></Label>
        </StackPanel>
    </Grid>

</Window>

gameMenu.xaml.cs

    namespace menu
    {

        public partial class gameMenu : Window
        {
            public gameMenu()
            {
                InitializeComponent();
            }

            protected void singlePlayer_Click(object sender, RoutedEventArgs e)
            {
                singlePlayer.Content = "Clicked";
            }

            protected void multiPlayer_Click(object sender, RoutedEventArgs e)
            {
                multiPlayer.Content = "Clicked";
                multiPlayer multiPlayerScreen = new multiPlayer();
                multiPlayerScreen.Show();
            }

            protected void highScores_Click(object sender, RoutedEventArgs e)
            {
                highScores.Content = "Clicked";
            }

            protected void features_Click(object sender, RoutedEventArgs e)
            {
                features.Content = "Clicked";
            }
        }
    } 


multiPlayer.xaml

  <Window x:Class="menu.multiPlayer"
            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:menu"
            mc:Ignorable="d"
            Title="Multi Player | Memory Game" Height="450" Width="800">


        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="1*" />
                <ColumnDefinition Width="1*"/>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="1*" />
                <RowDefinition Height="1*" />
            </Grid.RowDefinitions>
            <StackPanel Orientation="Horizontal" Grid.Column="0" Grid.Row="0">
                <Label Content="Name of 1st Player:"/>
                <TextBox />
                <Label Content="Name of 2nd Player:"/>
                <TextBox />
            </StackPanel>
        </Grid>

    </Window>

提前感谢，德克