相关疑难解决方法(0)

我试图了解如何更新UI,如果我有一个依赖于另一个属性的只读属性,以便更改一个属性更新两个UI元素(在这种情况下是一个文本框和一个只读文本框.例如:

public class raz : INotifyPropertyChanged
{

  int _foo;
  public int foo
  {
    get
    {
      return _foo;
    }
    set
    {
      _foo = value;
      onPropertyChanged(this, "foo");
    }
  }

  public int bar
  {
    get
    {
      return foo*foo;
    }
  }

  public raz()
  {

  }

  public event PropertyChangedEventHandler PropertyChanged;
  private void onPropertyChanged(object sender, string propertyName)
  {
    if(this.PropertyChanged != null)
    {
      PropertyChanged(sender, new PropertyChangedEventArgs(propertyName));
    }
  }
}

我的理解是,当修改foo时,bar不会自动更新UI.这是正确的方法吗？

我有这Bank门课:

public class Bank : INotifyPropertyChanged
{
    public Bank(Account account1, Account account2)
    {
        Account1 = account1;
        Account2 = account2;
    }

    public Account Account1 { get; }
    public Account Account2 { get; }

    public int Total => Account1.Balance + Account2.Balance;

    public event PropertyChangedEventHandler PropertyChanged = delegate { };

    public void RaisePropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

Bank取决于其他类,并具有Total根据这些其他类的属性计算的属性.每当Account.Balance更改任何这些属性时,PropertyChanged都会引发Account.Balance:

public class Account : INotifyPropertyChanged
{
    private int …