Question

C#中binding时使用iNotifyPropertyChanged问题

我写了下面的代码
public class Str : INotifyPropertyChanged
{
public event ProgressChangedEventHandler PropertyChanged;
string txtZZ;
public string txt
{
get { return txtZZ; }
set
{
txtZZ = value;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
编译不通过，提示
“WpfApplication1.Str”不实现接口成员“System.ComponentModel.INotifyPropertyChanged.PropertyChanged”。“WpfApplication1.Str.PropertyChanged”无法实现“System.ComponentModel.INotifyPropertyChanged.PropertyChanged”，因为它没有匹配的返回类型“System.ComponentModel.PropertyChangedEventHandler”。
求高手
PropertyChanged(this, new PropertyChangedEventArgs("txt"));

没改掉。

Answer 1

public event ProgressChangedEventHandler PropertyChanged;这句话错了

应该是public event PropertyChangedEventHandler PropertyChanged;