开始更新一点有意思的了

首先 数据绑定  其中之一 Element 绑定

看例子

<Window x:Class="WpfApplication20.MainWindow"




        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"




        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"




        Title="MainWindow" Height="156.383" Width="246.489" x:Name="MWindow">



    <Grid>



        <TextBox HorizontalAlignment="Left" Height="23" Margin="30,48,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" Text="{Binding ElementName=MWindow,Path=PresonName}"/>



        <TextBlock HorizontalAlignment="Left" Margin="30,16,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="42" Text="部门："/>



        <Button Content="提交" HorizontalAlignment="Left" Margin="30,85,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>



        <Button Content="重置" HorizontalAlignment="Left" Margin="127,85,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/>



        <TextBlock HorizontalAlignment="Left" Margin="85,16,0,0" TextWrapping="Wrap"  VerticalAlignment="Top" Text="{Binding ElementName=MWindow,Path=Department}"/>







    </Grid>



</Window>

   public partial class MainWindow : Window,INotifyPropertyChanged




    {



        public MainWindow()




        {



            InitializeComponent();



        }







        private string department;







        public string Department 



        {



            get { return "软件开发"; }







        }



        private string presonName;







        public string PresonName



        {



            get { return presonName; }



            set { presonName = value;



            OnPropertyChanged("PresonName");



            }



        }



        private void Button_Click(object sender, RoutedEventArgs e)




        {



            MessageBox.Show("Hi," + PresonName);



        }







        private void Button_Click_1(object sender, RoutedEventArgs e)




        {



            PresonName = "";



        }







        #region INotifyPropertyChanged 成员








        public event PropertyChangedEventHandler PropertyChanged;



        public void OnPropertyChanged(string name) 




        {



            if(PropertyChanged!=null){



            PropertyChanged.Invoke(this,new PropertyChangedEventArgs(name));



            }



        }







        #endregion




    }

我们在这个例子里有俩个操作

一个是数据绑定

一个是数据通知

绑定 是用Element 指定window 窗体 因为 创建属性以后 window 窗体就有这个属性 通过名字.属性的方式

通知 需要继承 INotifyPropertyChanged

实现接口方法

  public event PropertyChangedEventHandler PropertyChanged;

    public void OnPropertyChanged(string name) 
        {
            if(PropertyChanged!=null){
            PropertyChanged.Invoke(this,new PropertyChangedEventArgs(name));
            }
        }

在需要通知的属性下面  加上

OnPropertyChanged（“”属性名“”）;

就可以起到通知作用

WPF 精修篇 数据绑定 更新通知