mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/PropertyEditing/PropertyFilterPredicate.cs

   1 namespace System.Activities.Presentation.PropertyEditing {
   2     using System;
   3     using System.Globalization;
   4     using System.Runtime;
   5     using System.Activities.Presentation;
   6
   7     /// <summary>
   8     /// Represents a predicate for search/filtering
   9     /// </summary>
  10     [Fx.Tag.XamlVisible(false)]
  11     public class PropertyFilterPredicate
  12     {
  13         private string _matchText;
  14
  15         /// <summary>
  16         /// Creates a PropertyFilterPredicate.
  17         /// </summary>
  18         /// <param name="matchText"></param>
  19         /// <exception cref="ArgumentNullException">When matchText is null</exception>
  20         public PropertyFilterPredicate(string matchText) {
  21             if (matchText == null)
  22                 throw FxTrace.Exception.ArgumentNull("matchText");
  23
  24             _matchText = matchText.ToUpper(CultureInfo.CurrentCulture);
  25         }
  26
  27         /// <summary>
  28         /// Gets the string predicate
  29         /// </summary>
  30         protected string MatchText {
  31             get {
  32                 return _matchText;
  33             }
  34         }
  35
  36         /// <summary>
  37         /// Returns true if a case insensitive match of the predicate string is contained
  38         /// within the target string.
  39         /// </summary>
  40         /// <param name="target">The string filter</param>
  41         /// <returns></returns>
  42         public virtual bool Match(string target) {
  43             return target != null && target.ToUpper(CultureInfo.CurrentCulture).Contains(_matchText);
  44         }
  45     }
  46 }