mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/View/TypeToArgumentTypeConverter.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.View
   6 {
   7     using System.Diagnostics;
   8     using System.Globalization;
   9     using System.Windows.Data;
  10     using System.Activities.Presentation.Model;
  11     using System.Runtime;
  12
  13     // This converter converts from InArgument<T>, OutArgument<T>, Activity<T> to T
  14     // this does not support convert back.
  15     internal sealed class TypeToArgumentTypeConverter : IValueConverter
  16     {
  17         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  18         {
  19             object convertedValue = null;
  20             Type type = value as Type;
  21             if (type != null)
  22             {
  23                 if (type.GetGenericArguments().Length > 0)
  24                 {
  25                     convertedValue = type.GetGenericArguments()[0];
  26                 }
  27             }
  28             return convertedValue;
  29         }
  30
  31         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  32         {
  33             throw FxTrace.Exception.AsError(new NotSupportedException());
  34         }
  35     }
  36 }