在两个用户控件/视图之间传递数据

Question

使用MVVM

我正在尝试在一个视图（view1）中传递在控件（附加代码中的文本框）中输入的数据，并在第二个视图（view2）中使用该数据。目前，通过在App.xaml文件中声明我的所有视图，我可以将view2中的文本块与在view1中的文本框中输入的信息绑定起来，并查看显示在所述文本块中的信息。但是我也想使用在view2的视图模型中输入的信息，但不知道如何在其中访问它以使用信息。

有人可以告诉我如何去做吗？谢谢！

App.xaml [资源声明]

<Application.Resources>
<vws:DefaultVM x:Key="DefaultVMApp"></vws:DefaultVM>
<vws:View1 x:Key="View1App"></vws:View1>
<vws:View2 x:Key="View2App"></vws:View2>
<vm:AppVM x:Key="AppVMApp"></vm:AppVM>
<vm:View1VM x:Key="View1VMApp"></vm:View1VM>
<vm:View2VM x:Key="View2VMApp"></vm:View2VM>
</Application.Resources>

View1.xaml

    <UserControl.DataContext>
    <StaticResource ResourceKey="View1VMApp"></StaticResource>
    </UserControl.DataContext>
    <Grid Background="Aqua">
    <StackPanel Margin="100">
    <TextBox x:Name="firstNameTextBoxView1" Text="Binding View1InfoClass.FirstName, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged"></TextBox>           
    <Button Command="Binding Source=StaticResource AppVMApp, Path=View2ButtonCommand"  Content="Go to view2" Height="20" Width="70" />
    </StackPanel>
</Grid>

View2.xaml

<UserControl.DataContext>
        <StaticResource ResourceKey="View2VMApp"></StaticResource>
    </UserControl.DataContext>
    <Grid Background="Beige">
        <StackPanel Margin="100">

            <TextBlock x:Name="View1TextBlock" Text="Binding Source=StaticResource View1VMApp, Path=View1InfoClass.FirstName" ></TextBlock>

        </StackPanel>
    </Grid>

AppVM

    public class AppVM : ObservableObject
        
            //Create a property that controls current view
            private static object _currentView =  new DefaultVM();
            public object CurrentView
            
                get  return _currentView; 
                private set
                
                    OnPropertyChanged(ref _currentView, value);
                
            
            private string _textboxText;
            public string TextboxText
            
                get  return _textboxText; 
                set
                
                    OnPropertyChanged(ref _textboxText, value);
                
            
            public AppVM()
            
                View1ButtonCommand = new RelayCommand(ShowView1, AlwaysTrueCommand);
                View2ButtonCommand = new RelayCommand(ShowView2, AlwaysTrueCommand);
                DefaultCommand = new RelayCommand(ShowDefault, AlwaysTrueCommand);  
            
//Instantiate the relaycommands, we will need to instantiate relaycommand objects for every command we need to perform. 
            //This means that we will need to do this for preses of all buttons
            public RelayCommand View1ButtonCommand  get; private set; 
            public RelayCommand View2ButtonCommand  get; private set; 

            public RelayCommand DefaultCommand  get; private set; 


            public void ShowDefault(object dummy)
            
                CurrentView = new DefaultVM();
            

            public void ShowView1(object dummy)
            
                CurrentView = new View1();
            

            public void ShowView2(object dummy)
              
                CurrentView =  new View2();
            

            public bool AlwaysTrueCommand(object dummy)
            
                return true;