66 lines
2.4 KiB
C#
66 lines
2.4 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="StateMachineExtension.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Activities.Statements
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{
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using System;
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using System.Activities.Hosting;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime;
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using System.Text;
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/// <summary>
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/// StateMachineExtension is used to resume a bookmark outside StateMachine.
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/// </summary>
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class StateMachineExtension : IWorkflowInstanceExtension
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{
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private WorkflowInstanceProxy instance;
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/// <summary>
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/// Used to get additional extensions.
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/// </summary>
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/// <returns>Returns a IEnumerable of extensions</returns>
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public IEnumerable<object> GetAdditionalExtensions()
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{
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return null;
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}
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/// <summary>
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/// called with the targe instance under WorkflowInstance.Initialize
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/// </summary>
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/// <param name="instance">The value of WorkflowInstanceProxy</param>
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public void SetInstance(WorkflowInstanceProxy instance)
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{
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this.instance = instance;
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}
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/// <summary>
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/// Used to resume bookmark outside workflow.
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/// </summary>
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/// <param name="bookmark">The value of Bookmark to be resumed</param>
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public void ResumeBookmark(Bookmark bookmark)
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{
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// This method is necessary due to CSDMain 223257.
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IAsyncResult asyncResult = this.instance.BeginResumeBookmark(bookmark, null, Fx.ThunkCallback(new AsyncCallback(StateMachineExtension.OnResumeBookmarkCompleted)), this.instance);
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if (asyncResult.CompletedSynchronously)
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{
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this.instance.EndResumeBookmark(asyncResult);
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}
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}
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static void OnResumeBookmarkCompleted(IAsyncResult result)
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{
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if (!result.CompletedSynchronously)
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{
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WorkflowInstanceProxy instance = result.AsyncState as WorkflowInstanceProxy;
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Fx.Assert(instance != null, "BeginResumeBookmark should pass a WorkflowInstanceProxy object as the async state object.");
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instance.EndResumeBookmark(result);
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}
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}
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}
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}
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