WPF 精修篇 数据绑定 更新通知
作者:互联网
原文:WPF 精修篇 数据绑定 更新通知
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
标签:PropertyChanged,string,void,绑定,精修,WPF,public,name 来源: https://www.cnblogs.com/lonelyxmas/p/12075441.html