<Window x:Class="BindingDemo1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="254" Width="430" Loaded="Window_Loaded"> <Grid Name="gr"> <Button Content="name" Height="23" HorizontalAlignment="Left" Margin="48,65,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="48,12,0,0" Name="txtName" VerticalAlignment="Top" Width="333" /> <Button Content="age" Height="23" HorizontalAlignment="Left" Margin="48,169,0,0" Name="button2" VerticalAlignment="Top" Width="75" Click="button2_Click" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="48,116,0,0" Name="txtAge" VerticalAlignment="Top" Width="333" /> </Grid> </Window>
using System.ComponentModel; namespace BindingDemo1 { class Student : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; private string name; public string Name { get { return name; } set { name = value; if (this.PropertyChanged != null) { this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Name")); } } } private int age; public int Age { get { return age; } set { age = value; if (this.PropertyChanged != null) { this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Age")); } } } } }
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace BindingDemo1 { /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { Student stu = new Student(); public MainWindow() { InitializeComponent(); this.DataContext = stu; this.txtName.SetBinding(TextBox.TextProperty, new Binding("Name")); this.txtAge.SetBinding(TextBox.TextProperty, new Binding("Age")); } private void button1_Click(object sender, RoutedEventArgs e) { stu.Name += "testName"; } private void Window_Loaded(object sender, RoutedEventArgs e) { stu.Age += 10; stu.Name += "testName"; } private void button2_Click(object sender, RoutedEventArgs e) { stu.Age += 10; } } }
INotifyPropertyChanged 接口用于向客户端(通常是执行绑定的客户端)发出某一属性值已更改的通知。
使用方式(操作步骤):
1. 定义(类必须继承INotifyPropertyChanged接口)
2. 页面实例化
3. XAML UI 绑定
4. 其他 UI 改变其绑定值
注意:
以上操作可参考“实例一”中描述;
通知项属性用于不同UI中动态改变绑定信息;
INotifyPropertyChanged为接口,PropertyChanged为事件,在更改属性值时触发(PropertyChanged 事件
可以通过将 null或 String. Empty 用作 PropertyChangedEventArgs 中的属性名,指示该对象上的所有属性
都已更改);
博客内容主要用于日常学习记录,内容比较随意,如有问题,还需谅解!!!