代码中未定义的UIF元素中定义的WPF数据绑定问题

Question

我需要在代码中定义新的UI元素以及数据绑定,因为它们将在运行时之后实现.这是我想要做的简化版本.

数据模型:

public class AddressBook : INotifyPropertyChanged
{
    private int _houseNumber;
    public int HouseNumber
    {
        get { return _houseNumber; }
        set { _houseNumber = value; NotifyPropertyChanged("HouseNumber"); }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void NotifyPropertyChanged(string sProp)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(sProp));
        }
    }
}

代码绑定:

AddressBook book = new AddressBook();
book.HouseNumber = 123;
TextBlock tb = new TextBlock();
Binding bind = new Binding("HouseNumber");
bind.Source = book;
bind.Mode = BindingMode.OneWay;
tb.SetBinding(TextBlock.TextProperty, bind); // Text block displays "123"
myGrid.Children.Add(tb);
book.HouseNumber = 456; // Text block displays "123" but PropertyChanged event fires

首次绑定数据时,将使用正确的门牌号更新文本块.然后,如果我稍后在代码中更改门牌号,则会触发本书的PropertyChanged事件,但不会更新文本块.谁能告诉我为什么？

谢谢,本

Answer 1

它的根源是我传递给PropertyChangedEventArgs的字符串与该属性的名称不完全匹配.我有这样的事情:

public int HouseNumber
{
    get { return _houseNumber; }
    set { _houseNumber = value; NotifyPropertyChanged("HouseNum"); }
}

它应该在哪里:

public int HouseNumber
{
    get { return _houseNumber; }
    set { _houseNumber = value; NotifyPropertyChanged("HouseNumber"); }
}

哎呀!感谢您向正确的方向努力.