using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;
namespace XamlTest
{
/// <summary>
/// Interaction logic for Window17.xaml
/// </summary>
public partial class Window17 : Window
{
public Window17()
{
InitializeComponent();
Binding b1 = new Binding("Text") { Source = txt1 };
Binding b2 = new Binding("Text") { Source = txt2 };
Binding b3 = new Binding("Text") { Source = txt3 };
Binding b4 = new Binding("Text") { Source = txt4 };
MultiBinding mb = new MultiBinding();
mb.Bindings.Add(b1);
mb.Bindings.Add(b2);
mb.Bindings.Add(b3);
mb.Bindings.Add(b4);
mb.Converter = new MultiBindingConverter();
btn.SetBinding(Button.IsEnabledProperty, mb);
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
namespace XamlTest
{
public class MultiBindingConverter:IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (!values.Cast<string>().Any(s=>string.IsNullOrEmpty(s)) && values[0].ToString()==values[1].ToString() && values[2].ToString()==values[3].ToString())
{
return true;
}
return false;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
}