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Value Converters for WPF and Silverlight

/ Published in: C#
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Value converters allow ease of converting code-behind values to dependency property values

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  1. /** XAML code
  2.  
  3.     <src:VisibilityFromBoolConverter   x:Key="DefaultVisibleConverter" />                                               <!-- src is the app namespace, declared in header -->
  4.     
  5.     <Border Visibility="{Binding Selected, Converter={StaticResource DefaultVisibleConverter}}" Background="White" >    <!-- usage of converter -->
  6.  
  7. **/	
  8.  
  9. using System;
  10. using System.Globalization;   		// CultureInfo
  11. using System.Windows.Data;  		// IValueConverter
  12.  
  13. namespace mypcforsilvernet
  14. {
  15.     public class VisibilityFromBoolConverter : IValueConverter
  16.     {
  17.         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  18.         {
  19.             if (value == null)
  20.                 return Visibility.Visible;
  21.  
  22.             bool visibility = (bool)value;
  23.  
  24.             return visibility ? Visibility.Visible : Visibility.Collapsed;
  25.         }
  26.  
  27.         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  28.         {
  29.             Visibility visibility = (Visibility)value;
  30.  
  31.             return (visibility == Visibility.Visible);
  32.         }
  33.     } 
  34. }

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