无法以编程方式从MainWindowViewModel中读取更新的用户控件属性

Question

我在我的WPF应用程序中跟踪代码。我在使用ContentPresenter控件更改SelectedAccountType组合框值时动态呈现MainWindow中的用户控件。 我在UI中的MyProperty文本框中输入一些值，然后单击MainWindow上的Save按钮。但是我没有在Save方法的MainWindowViewModel.cs中看到这个值（即点击Save按钮）。 我的所有ViewModel都扩展了这个抽象类：

public abstract class ViewModelBase : INotifyPropertyChanged, IDisposable

我在这里想念的是什么？

感谢。

这是我的代码：

MainWindow.xaml：

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:MainViewModel="clr-namespace:Test.ViewModel"
        xmlns:ViewModel="clr-namespace:Test.ViewModel.AccountTypes"
        xmlns:View="clr-namespace:Test.View" x:Class="Test.MainWindow"
        xmlns:Views="clr-namespace:Test.View.AccountTypes"
        xmlns:v="clr-namespace:Test.View.AccountTypes"
        xmlns:vm="clr-namespace:Test.ViewModel.AccountTypes"
        Title="{Binding DisplayName, Mode=OneWay}" ResizeMode="CanResize" WindowStartupLocation="CenterScreen">
    <Window.DataContext>
        <MainViewModel:MainWindowViewModel/>
    </Window.DataContext>

    <Grid>

        <StackPanel Grid.Row="0"  HorizontalAlignment="Left" VerticalAlignment="Top" Orientation="Horizontal" Height="28" Width="auto" Margin="5,0,0,0">
            <ComboBox Width="360" Margin="1,0" ItemsSource="{Binding AccountTypes}" DisplayMemberPath="Code" SelectedValuePath="ID" SelectedItem="{Binding SelectedAccountType,
 Mode=TwoWay}" TabIndex="0" />
        </StackPanel>

        <ContentPresenter Content="{Binding CurrentViewModel}">
        <ContentPresenter.Resources>
                <DataTemplate DataType="{x:Type ViewModel:AC1ViewModel}">
                    <Views:AC1View/>
            </DataTemplate>
                <DataTemplate DataType="{x:Type ViewModel:AC2ViewModel}">
                    <Views:AC2View/>
            </DataTemplate>
        </ContentPresenter.Resources>
    </ContentPresenter>
        </Grid>

MainWindowViewModel.cs

public object CurrentViewModel
{
    get 
        { 
            return m_currentViewModel; 
        }
        set
            {
                m_currentViewModel = value;
                OnPropertyChanged("CurrentViewModel");    
            }
        }   


public AccountType SelectedAccountType
{
    get
    {
        return m_selectedSearchAccountType;
    }
    set
    {
        m_selectedSearchAccountType = value;
            if (SelectedAccountType.Code == "AC1")
        {
            CurrentViewModel  = new AC1ViewModel();
        }
        else if (SelectedAccountType.Code == "AC2")
        {
            CurrentViewModel  = new AC2ViewModel();
        }
    }
}

public void Save()
{
        Type sourceType = CurrentViewModel.GetType();
        PropertyInfo[] sourcePI = sourceType.GetProperties();

        Type destinationType = securityDetails.GetType();
        PropertyInfo[] destinationPI = destinationType.GetProperties();

        string propertyName = string.Empty;
        object propertyValue = null;

        foreach (var pinfo in sourcePI)
        {
            propertyName = pinfo.Name.Trim();
            propertyValue = pinfo.GetValue(CurrentViewModel)
        }
}

AC1View.xaml：

<TextBox HorizontalAlignment="Left" Height="23" Margin="1,1,0,0" VerticalAlignment="Top" Width="230" TabIndex="1" Text="{Binding MyProperty,UpdateSourceTrigger=PropertyChanged}" />

AC1ViewModel.cs

public class AC1ViewModel
{
    private string m_myProperty = "";
    public AC1ViewModel()
    {

    }


    public string MyProperty
    {
        get
        {
            return m_myProperty;
        }
        set
        {
            m_myProperty = value;
        }
    }

}