WPF学习之INotifyPropertyChanged（学习记录）

1.先新建一个ViewModelBase类，继承于INotifyPropertyChanged接口类：

namespace leason2
{
    public class ViewModelBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged([CallerMemberName] string propertyName = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

MainViewModel类继承于ViewModelBase类，定义两个属性，分别在set块中加入OnPropertyChanged()：

namespace leason2
{
    public class MainViewModel : ViewModelBase
    {
        public MainViewModel()
        {
            ShowCommand = new MyCommand(Show);
        }

        private string m_name;
        public string Name
        {
            get { return m_name; }
            set
            {
                m_name = value;
                OnPropertyChanged();
            }
        }

        private string m_title;
        public string Title
        {
            get { return m_title; }
            set
            {
                m_title = value;
                OnPropertyChanged();
            }
        }

        public MyCommand ShowCommand { get; set; }

        public void Show()
        {
            Name = "点击了按钮";
            Title = "我是标题";
        }
    }
}

Mainwindow.xaml中绑定上述两个属性：

    <Grid>
        <StackPanel>
            <TextBox Text="{Binding Name}"/>
            <TextBox Text="{Binding Title}"/>
            <Button Command="{Binding ShowCommand}"/>
        </StackPanel>
    </Grid>

点击按钮，实现Show方法后，TextBox实现打印两个属性文字打印。