之前，我通過4篇文章介紹了在WF4中開發基于事件的工作流的范例。請參考下面的鏈接。

?

這一篇是這個系列的最后一篇，介紹如何通過配置文件，而不是代碼的方式啟動宿主。這在現實工作中是相當有用的，請大家參考下面的實例。

【注意】有朋友也問到單獨用數據庫存儲業務方面的數據，那是沒有錯的。一般可以通過自定義的Activity去完成這些操作，都是標準的ADO.NET的數據訪問操作。這里就不做展開了。

?

這個案例的最終代碼范例，請通過 這里 下載

1.修改之前的Host代碼

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; using System.Activities; using System.ServiceModel.Activities; using System.ServiceModel.Description;using System.Activities.DurableInstancing; using System.Runtime.DurableInstancing; using System.Activities.Persistence; using System.ServiceModel.Activities.Description; using System.Xml.Linq;namespace Host {class Program{static void Main(string[] args){var host = new WorkflowServiceHost(new DocumentReviewLib.DocumentReviewWorkflow(),new Uri("http://localhost:8080/DRS"));host.AddDefaultEndpoints();//這個方法是添加了一些標準的端點host.Description.Behaviors.Add(new ServiceMetadataBehavior() { HttpGetEnabled = true });var store = new SqlWorkflowInstanceStore("server=(local)\\sqlexpress;database=WF4;integrated security=true");host.UnknownMessageReceived += (o, e) =>{Console.WriteLine("\n" + e.Message + "\n");};host.Description.Behaviors.Add(new WorkflowIdleBehavior(){TimeToPersist = TimeSpan.FromSeconds(0)});XNamespace xNS = XNamespace.Get("http://xizhang.com/DocumentReview");store.Promote("DocumentReview",new List<XName>() { xNS.GetName("TicketId") },null);host.WorkflowExtensions.Add(new Extensions.MyInstanceStoreParticpant());host.DurableInstancingOptions.InstanceStore = store;host.Open();var common = new ServiceHost(typeof(CommonService),new Uri("http://localhost:8080/Common"));common.AddServiceEndpoint(typeof(ICommonService).FullName,new BasicHttpBinding(),"");common.Open();Console.WriteLine("Server is ready.");Console.Read();}}[ServiceContract]public interface ICommonService{[OperationContract]int[] GetTicketIds();}public class CommonService : ICommonService{public int[] GetTicketIds(){var ctx = new InstanceStoreDataContext();return ctx.DocumentReviewTasks.Select(r => (int)r.TicketId).ToArray();}}}

2. 修改之后的Host代碼（請大家比較一下有何區別）

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; using System.Activities; using System.ServiceModel.Activities; using System.ServiceModel.Description;using System.Activities.DurableInstancing; using System.Runtime.DurableInstancing; using System.Activities.Persistence; using System.ServiceModel.Activities.Description; using System.Xml.Linq;namespace Host {class Program{static void Main(string[] args){var host = new WorkflowServiceHost(new WorkflowService() { ConfigurationName = "DocumentReviewLib.DocumentReviewWorkflow",Body = new DocumentReviewLib.DocumentReviewWorkflow()});//這里可以通過進一步的Behavior定制來簡化。此處略 XNamespace xNS = XNamespace.Get("http://xizhang.com/DocumentReview");var store = (SqlWorkflowInstanceStoreBehavior)host.Description.Behaviors.FirstOrDefault(b => b.GetType() == typeof(SqlWorkflowInstanceStoreBehavior));store.Promote("DocumentReview",new List<XName>() { xNS.GetName("TicketId") },null);//這里可以通過進一步的Behavior定制來簡化。此處略host.WorkflowExtensions.Add(new Extensions.MyInstanceStoreParticpant());host.Open();var common = new ServiceHost(typeof(CommonService));common.Open();Console.WriteLine("Server is ready.");Console.Read();}}[ServiceContract]public interface ICommonService{[OperationContract]int[] GetTicketIds();}public class CommonService : ICommonService{public int[] GetTicketIds(){var ctx = new InstanceStoreDataContext();return ctx.DocumentReviewTasks.Select(r => (int)r.TicketId).ToArray();}}}

3.添加的app.config文件內容

<?xml version="1.0" encoding="utf-8" ?> <configuration><configSections></configSections><connectionStrings><add name="Host.Properties.Settings.WF4ConnectionString" connectionString="Data Source=.\sqlexpress;Initial Catalog=WF4;Integrated Security=True"providerName="System.Data.SqlClient" /></connectionStrings><system.serviceModel><behaviors><serviceBehaviors><behavior name="WorkflowService"><sqlWorkflowInstanceStore connectionStringName="Host.Properties.Settings.WF4ConnectionString"/><workflowIdle timeToPersist="0" timeToUnload="0"/><serviceMetadata httpGetEnabled="true"/></behavior></serviceBehaviors></behaviors><services><service name="DocumentReviewLib.DocumentReviewWorkflow" behaviorConfiguration="WorkflowService"><host><baseAddresses><add baseAddress="http://localhost:8080/DRS"/></baseAddresses></host><endpoint contract="IDocumentReview" address="" binding="basicHttpBinding"></endpoint></service><service name="Host.CommonService"><host><baseAddresses><add baseAddress="http://localhost:8080/Common"/></baseAddresses></host><endpoint contract="Host.ICommonService" binding="basicHttpBinding" address=""></endpoint></service></services></system.serviceModel></configuration>?這個案例的最終代碼范例，請通過 下載

轉載于:https://www.cnblogs.com/Mayvar/archive/2011/09/03/wanghonghua201109030455.html

總結

以上是生活随笔為你收集整理的WF事件驱动(5)的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。