using System;using System.Linq;using System.Windows;using System.Windows.Controls;using System.Windows.Data;namespace TestOfMultiBinding{    /// 
    /// Interaction logic for MainWindow.xaml    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();             this.SetMultiBinding();        }        private void SetMultiBinding()        {            Binding b1 = new Binding("Text")                             {                                 Source = this.textBox1                             };            Binding b2 = new Binding("Text")                             {                                 Source = this.textBox2                             };            Binding b3 = new Binding("Text")                             {                                 Source = this.textBox3                             };            Binding b4 = new Binding("Text")                             {                                 Source = this.textBox4                             };            MultiBinding mb = new MultiBinding()                                  {                                      Mode = BindingMode.OneWay                                  };            mb.Bindings.Add(b1);            mb.Bindings.Add(b2);            mb.Bindings.Add(b3);            mb.Bindings.Add(b4);            mb.Converter = new LogonMultiBindingConverter();            this.button1.SetBinding(Button.IsEnabledProperty, mb);        }      }    public class LogonMultiBindingConverter : IMultiValueConverter    {        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            if (!values.Cast
    
     ().Any(text => string.IsNullOrEmpty(text))                && values[0].ToString() == values[1].ToString()                && values[2].ToString() == values[3].ToString())            {                return true;            }            return false;        }        //不会被调用        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)        {            throw new NotImplementedException();        }    }}