C# 使用INotifyPropertyChanged绑定到属性的XAML仅在应用程序启动时有效

我在XAML中设置绑定的数据模型中有以下代码。问题是初始值被正确地加载到XAML中，但是没有反映任何更改。这是我第一次使用INotify，所以我有点迷路了

public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel()
    {

    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged(String propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (null != handler)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
        if (propertyName=="BasicInfoText")
        {
            AdvancedInfoText = "Basic info updated";
        }
        if (propertyName=="AdvancedInfoText")
        {
            //do nothing
        }
    }

    //text for the basic info 
    public String BasicInfoText
    {
        get { return _basicInfoText; }
        set
        {
            if (_basicInfoText != value)
            {
                _basicInfoText = value;
                NotifyPropertyChanged("BasicInfoText");
            }
        }
    }
    private String _basicInfoText = "Initial text";
    //text for the advanced info 
    public String AdvancedInfoText
    {
        get { return _advancedInfoText; }
        set
        {
            if (_advancedInfoText != value)
            {
                _advancedInfoText = value;
                NotifyPropertyChanged("AdvancedInfoText");
            }
        }
    }
    private String _advancedInfoText = "Initial Advance Text";

我还尝试将私有的BasicInfo文本和advancedInfoText更改为公共文本，以确保更改会得到通知，但运气不佳。有什么建议吗

更新>

因此，我已尝试为这些活动注册，但仍然不起作用。代码现在如下所示：

public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel()
    {

                this.PropertyChanged += MyViewModel_PropertyChanged;
    }
    //***********************************
    //catching events
    void MyViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        switch (e.PropertyName)
        {
            case "BasicSelected":
                {// Do something
                    BasicInfoText = "basic text";
                    break;
                }
            case "WideSelected":
                {// Do something
                    BasicInfoText = "wide text";
                    break;
                }
            case "NarrowSelected":
                {// Do something
                    BasicInfoText = "narrow text";
                    break;
                }
            case "ArtificalSelected":
                {// Do something
                    BasicInfoText = "artificial text";
                    break;
                }
        }
    }


    //***********************************
    //register handlers
    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, e);
        }
    }


    protected void OnPropertyChanged(String propertyName)
    {
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
    }

    //properties for the calculation and behavior
    public Boolean BasicSelected
    {
        get { return _basicSelected; }
        set {
              if (_basicSelected != value)
              {
                _basicSelected = value;
                OnPropertyChanged("BasicSelected");
             }
            }
    }
    public Boolean _basicSelected = true;
        //properties for the calculation and behavior
    public Boolean WideSelected
    {
        get { return _wideSelected; }
        set
        {
            if (_wideSelected != value)
            {
                _wideSelected = value;
                OnPropertyChanged("WideSelected");
            }
        }
    }
    public Boolean _wideSelected = false;
    //properties for the calculation and behavior
    public Boolean NarrowSelected
    {
        get { return _narrowSelected; }
        set
        {
            if (_narrowSelected != value)
            {
                _narrowSelected = value;
                OnPropertyChanged("NarrowSelected");
            }
        }
    }
    public Boolean _narrowSelected = false;
    //properties for the behavior test
    public Boolean ArtificalSelected
    {
        get { return _artificalSelected; }
        set
        {
            if (_artificalSelected != value)
            {
                _artificalSelected = value;
                OnPropertyChanged("ArtificalSelected");
            }
        }
    }
    public Boolean _artificalSelected = false;
    //text for the basic info 
    public String BasicInfoText
    {
        get { return _basicInfoText; }
        set
        {
            if (_basicInfoText != value)
            {
                _basicInfoText = value;
                OnPropertyChanged("BasicInfoText");
            }
        }
    }
    public String _basicInfoText = "Initial text 2";
    //text for the advanced info 
    public String AdvancedInfoText
    {
        get { return _advancedInfoText; }
        set
        {
            if (_advancedInfoText != value)
            {
                _advancedInfoText = value;
                OnPropertyChanged("AdvancedInfoText");
            }
        }
    }
    public String _advancedInfoText = "Initial Advance Text 2";

XAML如下所示：

public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel()
    {

                this.PropertyChanged += MyViewModel_PropertyChanged;
    }
    //***********************************
    //catching events
    void MyViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        switch (e.PropertyName)
        {
            case "BasicSelected":
                {// Do something
                    BasicInfoText = "basic text";
                    break;
                }
            case "WideSelected":
                {// Do something
                    BasicInfoText = "wide text";
                    break;
                }
            case "NarrowSelected":
                {// Do something
                    BasicInfoText = "narrow text";
                    break;
                }
            case "ArtificalSelected":
                {// Do something
                    BasicInfoText = "artificial text";
                    break;
                }
        }
    }


    //***********************************
    //register handlers
    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, e);
        }
    }


    protected void OnPropertyChanged(String propertyName)
    {
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
    }

    //properties for the calculation and behavior
    public Boolean BasicSelected
    {
        get { return _basicSelected; }
        set {
              if (_basicSelected != value)
              {
                _basicSelected = value;
                OnPropertyChanged("BasicSelected");
             }
            }
    }
    public Boolean _basicSelected = true;
        //properties for the calculation and behavior
    public Boolean WideSelected
    {
        get { return _wideSelected; }
        set
        {
            if (_wideSelected != value)
            {
                _wideSelected = value;
                OnPropertyChanged("WideSelected");
            }
        }
    }
    public Boolean _wideSelected = false;
    //properties for the calculation and behavior
    public Boolean NarrowSelected
    {
        get { return _narrowSelected; }
        set
        {
            if (_narrowSelected != value)
            {
                _narrowSelected = value;
                OnPropertyChanged("NarrowSelected");
            }
        }
    }
    public Boolean _narrowSelected = false;
    //properties for the behavior test
    public Boolean ArtificalSelected
    {
        get { return _artificalSelected; }
        set
        {
            if (_artificalSelected != value)
            {
                _artificalSelected = value;
                OnPropertyChanged("ArtificalSelected");
            }
        }
    }
    public Boolean _artificalSelected = false;
    //text for the basic info 
    public String BasicInfoText
    {
        get { return _basicInfoText; }
        set
        {
            if (_basicInfoText != value)
            {
                _basicInfoText = value;
                OnPropertyChanged("BasicInfoText");
            }
        }
    }
    public String _basicInfoText = "Initial text 2";
    //text for the advanced info 
    public String AdvancedInfoText
    {
        get { return _advancedInfoText; }
        set
        {
            if (_advancedInfoText != value)
            {
                _advancedInfoText = value;
                OnPropertyChanged("AdvancedInfoText");
            }
        }
    }
    public String _advancedInfoText = "Initial Advance Text 2";

`

---

向我们展示您的XAML代码您是否在某个地方更改了您的属性？项目作为INotifyPropertyChanged.PropertyChanged+=新的PropertyChangedEventHandleritem\u PropertyChanged；