实战基础技能(08)--------MVVM模式中WPF数据的完全绑定

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;

namespace 完全数据绑定
{
    class Person : INotifyPropertyChanged//INotifyPropertyChanged是.net内置的接口，数据绑定会检测DataContext是否实现了INotifyPropertyChanged，如果实现了就会监听PropertyChanged这个属性改变的事件
    {
        private string name;//定义名字
        private int age;//定义年龄

        public string Name
        { get; set; }
        public int Age//定义年龄属性
        {
            get { return age;}
            set
            { 
                this.age = value;

                if (PropertyChanged != null)
                {
                    PropertyChanged(this,new PropertyChangedEventArgs("Age"));
                }
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;//定义一个属性改变事件
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace 完全数据绑定
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private Person p1 = new Person();//定义一个字段并初始化
        public MainWindow()
        {
            InitializeComponent();
        }
        
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            p1.Name = "红马車";
            p1.Age = 24;

            txtName.DataContext = p1;
            txtAge.DataContext = p1;

        }
        //增加年龄
        private void btnAdd_Click(object sender, RoutedEventArgs e)
        {
            p1.Age++;
        }
        //显示年龄
        private void btnShow_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show(p1.Age.ToString());
        } 
    }
}