WPF > Data > Converters
Converters changes data from one type to another and apply custom logic to binding.
Implementation : create a class that implements
the IvalueConverter.
Example:
XAML:
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication2"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<local:YesNoConverter x:Key="YesNoConverter" />
</Window.Resources>
<StackPanel Margin="5">
<CheckBox x:Name="chk" IsChecked="{Binding ElementName=txtYesNo, Path=Text, Converter={StaticResource
YesNoConverter}}" Content="Yes/No"
/>
<TextBox Name="txtYesNo" />
</StackPanel>
</Window>
C# Code:
using System;
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.Navigation;
using System.Windows.Shapes;
namespace WpfApplication2
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
///
public class YesNoConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
switch (value.ToString())
{
case "Yes":
return true;
case "No":
return false;
}
return false;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is bool)
{
if ((bool)value == true)
return "Yes";
else
return "No";
}
return "No";
}
}
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
}
}
