WPF数据绑定，参考代码

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.Shapes;
using Wpf数据绑定;

namespace Wpf数据绑定
{
/// <summary>
/// Window1.xaml 的交互逻辑
/// </summary>
public partial class Window1 : Window
{
MainWindow wd;   //构建函数传值
//public Window1(MainWindow w)
//{
//    InitializeComponent();
//    wd = w;

//     aa.Text = wd.aaa.Text+wd.bbb.Password  ;   用窗口传值
//}

User1 us;  //对象实例化
public Window1(User1 w)   //用这个类接收新对象
{
InitializeComponent();

us = w;
aa.DataContext = w;        //获取或设置参与数据绑定时的数据的上下文。和前台进行绑定

bb.SetBinding(TextBox.TextProperty,     //不需要和前台进行绑定，这一局代码就可是实现并显示
new Binding("Pass") { Source = us, Mode = BindingMode.TwoWay });

//aa.Text = w.Username;//这句代码为什么不行呢？？？？？？
}

private void Button_Click_1(object sender, RoutedEventArgs e)
{

us.Username = DateTime.Now.ToString("HH:mm:ss.fff");
}
}
}

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

namespace Wpf数据绑定
{
public class User1 : INotifyPropertyChanged   //一个接口

{
private string code;

public string Code
{
get { return code; }
set { code = value; }
}
private string username;

public string Username
{
get { return username; }
set {
username = value;
OnPropertyChanged("Username");  //调用下面的方法
}
}

private string pass;

public string Pass
{
get { return pass; }
set { pass = value; }
}

public event PropertyChangedEventHandler PropertyChanged;   //用此种方法实现接口
public virtual void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}

}
}