mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/ViewState/WorkflowViewState.cs

   1 //----------------------------------------------------------------
   2 // <copyright company="Microsoft Corporation">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //----------------------------------------------------------------
   6
   7 namespace System.Activities.Presentation.ViewState
   8 {
   9     using System.Diagnostics.CodeAnalysis;
  10     using System.Runtime;
  11     using System.Xaml;
  12
  13     /// <summary>
  14     /// Class defining ViewStateManager and ViewStateId attached properties.
  15     /// </summary>
  16     public static class WorkflowViewState
  17     {
  18         /// <summary>
  19         /// Attachable property for ViewStateManager
  20         /// </summary>
  21         [SuppressMessage(FxCop.Category.Security, FxCop.Rule.DoNotDeclareReadOnlyMutableReferenceTypes, Justification = "XAML attached property declaration.")]
  22         public static readonly AttachableMemberIdentifier ViewStateManagerProperty = new AttachableMemberIdentifier(typeof(WorkflowViewState), "ViewStateManager");
  23
  24         /// <summary>
  25         /// Attachable property for IdRef
  26         /// </summary>
  27         [SuppressMessage(FxCop.Category.Security, FxCop.Rule.DoNotDeclareReadOnlyMutableReferenceTypes, Justification = "XAML attached property declaration.")]
  28         public static readonly AttachableMemberIdentifier IdRefProperty = new AttachableMemberIdentifier(typeof(WorkflowViewState), "IdRef");
  29
  30         /// <summary>
  31         /// Set ViewStateManager as an attached property on an object. This method is for XAML serialization purpose only and is not expected to be used by developers.
  32         /// </summary>
  33         /// <param name="instance">Instance object to attach ViewStateManager property on</param>
  34         /// <param name="viewStateManager">ViewStateManager object to attach</param>
  35         public static void SetViewStateManager(object instance, ViewStateManager viewStateManager)
  36         {
  37             AttachablePropertyServices.SetProperty(instance, ViewStateManagerProperty, viewStateManager);
  38         }
  39
  40         /// <summary>
  41         /// Get ViewStateManager attached property value from an object if set
  42         /// </summary>
  43         /// <param name="instance">Instance object to retrieve ViewStateManager attached property from</param>
  44         /// <returns>ViewStateManager object if set; null otherise</returns>
  45         public static ViewStateManager GetViewStateManager(object instance)
  46         {
  47             ViewStateManager viewStateManager;
  48             if (AttachablePropertyServices.TryGetProperty(instance, ViewStateManagerProperty, out viewStateManager))
  49             {
  50                 return viewStateManager;
  51             }
  52
  53             return null;
  54         }
  55
  56         /// <summary>
  57         /// Set IdRef as an attached property on an object. This method is for XAML serialization purpose only and is not expected to be used by developers.
  58         /// </summary>
  59         /// <param name="instance">Instance object to attach IdRef property on</param>
  60         /// <param name="idRef">refId value to attach</param>
  61         public static void SetIdRef(object instance, string idRef)
  62         {
  63             AttachablePropertyServices.SetProperty(instance, IdRefProperty, idRef);
  64         }
  65
  66         /// <summary>
  67         /// Get RefId attached property value from an object if set
  68         /// </summary>
  69         /// <param name="instance">Instance object to retrieve RefId attached property from</param>
  70         /// <returns>RefId value if set; null otherise</returns>
  71         public static string GetIdRef(object instance)
  72         {
  73             string idRef;
  74             if (AttachablePropertyServices.TryGetProperty(instance, IdRefProperty, out idRef))
  75             {
  76                 return idRef;
  77             }
  78
  79             return null;
  80         }
  81     }
  82 }