C# 超宽带帧导航

我用xaml创建了我的主页，它有一个框架，我可以替换导航到其他页面的内容

这是我的主页中的框架：

<SplitView.Content>
        <Frame x:Name="contentFrame" x:FieldModifier="public"/>
    </SplitView.Content>

到目前为止，它工作得非常完美。框架内容将具有CreateResume.xaml页面：

<Grid Background="Black">
    <Grid.RowDefinitions>
        <RowDefinition Height="150"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="200"/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>
    <TextBlock Text="Full Name:" Foreground="White" FontSize="20" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="5" />
    <TextBox Grid.Column="1" x:Name="fullName" PlaceholderText="Type your full name here" Width="250" HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="5" />

    <TextBlock Grid.Row="1" Text="Email:" Foreground="White" FontSize="20" HorizontalAlignment="Right" Margin="5" />
    <TextBox Grid.Row="1" Grid.Column="1" x:Name="email" PlaceholderText="Type your email here" HorizontalAlignment="Left" Width="250" Margin="5" />

    <TextBlock Grid.Row="2" Text="City:" Foreground="White" FontSize="20" HorizontalAlignment="Right" Margin="5" />
    <TextBox Grid.Row="2" Grid.Column="1" x:Name="city" PlaceholderText="Type your city here" HorizontalAlignment="Left" Width="250" Margin="5" />

    <TextBlock Grid.Row="3" Text="State:" Foreground="White" FontSize="20" HorizontalAlignment="Right" Margin="5" />
    <TextBox Grid.Row="3" Grid.Column="1" x:Name="state" PlaceholderText="Type your state name here" HorizontalAlignment="Left" Width="250" Margin="5" />

    <Button Grid.Row="4" Content="Save and Continue" Background="White" Foreground="DarkBlue" FontSize="20" HorizontalAlignment="Right" Click="Button_Click" />
</Grid>

此时我收到一个错误：“发生了类型为'System.AccessViolationException'的未处理异常”

---

我公开了框架，为什么会出现访问冲突异常？

主页是新页面，但它不会显示在窗口中

如果要导航到其他页面，则应与要导航的主页对话，并使主页导航到其他页面

好的方法是使用MVVM

第一：可以将MainPage绑定到MainViewModel，MainViewModel必须作为CreateResumeViewModel和EducationInfoViewModel子viewModel

我认为您可以在App.xaml中编写ViewModel

代码位于App.xaml.Resource中

<Application
    x:Class="MehdiDiagram.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MehdiDiagram"
    RequestedTheme="Light">
    <Application.Resources>
        <local:ViewModel x:Key="ViewModel"></local:ViewModel>
    </Application.Resources>
</Application>

CreateResumeViewModel有一个调用导航到其他页面的事件

ViewModel还有一个事件，该事件调用导航到其他页面

代码位于ViewModel中：

class ViewModel
{
    public ViewModel()
    {
        CreateResumeViewModel.NavigateToPage += (sender, type) =>
        {
            NavigateToPage?.Invoke(sender, type);
        };
    }

    public event EventHandler<Type> NavigateToPage; 

    public CreateResumeViewModel CreateResumeViewModel{ get; set; }=new CreateResumeViewModel;
}

您可以在CreateResumeViewModel中使用NavigateToPage事件来导航页面

见：

<Application
    x:Class="MehdiDiagram.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MehdiDiagram"
    RequestedTheme="Light">
    <Application.Resources>
        <local:ViewModel x:Key="ViewModel"></local:ViewModel>
    </Application.Resources>
</Application>

<Page
    x:Class="MehdiDiagram.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MehdiDiagram"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    DataContext="{StaticResource ViewModel}"
    mc:Ignorable="d">

DataContext="{Binding Source={StaticResource ViewModel},Path=CreateResumeViewModel}"

class ViewModel
{
    public ViewModel()
    {
        CreateResumeViewModel.NavigateToPage += (sender, type) =>
        {
            NavigateToPage?.Invoke(sender, type);
        };
    }

    public event EventHandler<Type> NavigateToPage; 

    public CreateResumeViewModel CreateResumeViewModel{ get; set; }=new CreateResumeViewModel;
}

    public MainPage()
    {
        this.InitializeComponent();
        ViewModel = (ViewModel) DataContext;
        ViewModel.NavigateToPage += ViewModel_NavigateToPage;
    }

    private void ViewModel_NavigateToPage(object sender, Type e)
    {
        Frame.Navigate(e);
    }