mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/Automation/TextFormatConverter.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4 namespace System.Activities.Presentation.Internal.PropertyEditing.Automation
   5 {
   6     using System;
   7     using System.Diagnostics.CodeAnalysis;
   8     using System.Globalization;
   9     using System.Windows.Data;
  10     using System.Activities.Presentation;
  11
  12     // <summary>
  13     // Simple converter that uses a format string to convert a value into a display string
  14     // This class is referenced in XAML.
  15     // </summary>
  16     [SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses")]
  17     internal class TextFormatConverter : IValueConverter
  18     {
  19
  20         private string _format;
  21
  22         // <summary>
  23         // Gets or sets the format string to apply
  24         // </summary>
  25         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
  26         public string Format
  27         {
  28             get {
  29                 return _format;
  30             }
  31             set {
  32                 _format = value;
  33             }
  34         }
  35
  36         // IValueConverter Members
  37
  38         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  39         {
  40             value = value ?? "null";
  41             return string.Format(culture ?? CultureInfo.CurrentCulture, _format ?? "{0}", value.ToString());
  42         }
  43
  44         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  45         {
  46             throw FxTrace.Exception.AsError(new InvalidOperationException());
  47         }
  48
  49     }
  50 }