C# 当codebehind中的值更改时，Usercontrol未更新

我有一个在运行时更新的viewmodel类。但是，如果viewmodel中的值在运行时在codebehind中更改，则不会更新视图。我哪里出错了

viewmodel如下所示：

public class vmA : modelA, INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(PropertyChangedEventArgs propertyChangedEventArgs)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyChangedEventArgs.PropertyName));
    }

    public vmA ()
    {
        SomeValue = 254.43F; //This value is shown when the control is loaded
    }

    public void SetSomeValue(int _someValue)
    {
        SomeValue = _someValue; // If this is executed, the view still shows 254.43, even though _someValue contains a different value
    }
}

模型（由viewmodel继承）类如下所示

public class modelA : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    public void OnPropertyChanged(PropertyChangedEventArgs propertyChangedEventArgs)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyChangedEventArgs.PropertyName));
    }

    private int someValue

    public int SomeValue
    {
        get { return someValue
        set { someValue value; OnPropertyChanged(new PropertyChangedEventArgs("SomeValue")); }                  
    }
}

<UserControl.DataContext>
    <vm:vmA></vm:vmA>
</UserControl.DataContext>

装订是这样做的

public class modelA : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    public void OnPropertyChanged(PropertyChangedEventArgs propertyChangedEventArgs)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyChangedEventArgs.PropertyName));
    }

    private int someValue

    public int SomeValue
    {
        get { return someValue
        set { someValue value; OnPropertyChanged(new PropertyChangedEventArgs("SomeValue")); }                  
    }
}

<UserControl.DataContext>
    <vm:vmA></vm:vmA>
</UserControl.DataContext>

文本框绑定：

<TextBox x:Name="tbBetragNetto" Text='{Binding BetragNetto, Mode=TwoWay}' Grid.Column="0"/>

---

因为您有2个

INotifyPropertyChanged

实现。绑定与希望它侦听的

PropertyChanged

事件相混淆。将视图模型收缩到以下位置：

public class vmA : modelA
{
    public vmA()
    {
        SomeValue = 254.43F; //This value is shown when the control is loaded
    }

    public void SetSomeValue(int _someValue)
    {
        SomeValue = _someValue; // If this is executed, the view still shows 254.43, even though _someValue contains a different value
    }
}

---

谢谢。我试试看。然后是否会通知视图有关viewmodel中的更改，例如，如果我向viewmodel添加了另一个属性？是。由于视图模型继承自实现了

INotifyPropertyChanged

的某些内容，因此它也将自然地拥有它。谢谢！很好