WF(WindowsWorkflowFoundation)工作流学习（二）一个Asp.Net与顺序工作流结合的例子

程序下载地址：http:files.cnblogs.comTerryFengWF2.rar建立一个空的解决方案，向其中加入一个顺序工作流类库和一个Asp.NetWeb应用程序项目，

程序下载地址： http://files.cnblogs.com/TerryFeng/WF2.rar

建立一个空的解决方案，向其中加入一个顺序工作流类库和一个Asp.Net Web 应用程序项目，结果如下图

向asp.Net 程序中，添加引用，“WF”是工作流项目，如图

向Web.Config 中加入WF的注册（细节下载代码看一下）。

添加一个全局Global.asax 文件，添加如下代码

protected void Application_Start(object sender, EventArgs e) { WorkflowRuntime workflowRuntime = new WorkflowRuntime("WorkflowRuntime"); workflowRuntime.StartRuntime(); Application["WorkflowRuntime"] = workflowRuntime; } protected void Session_Start(object sender, EventArgs e) { WorkflowRuntime workflowRuntime = Application["WorkflowRuntime"] as WorkflowRuntime; workflowRuntime.StopRuntime(); }

向Default.aspx中添加3个控件，Textbox,button,label ，双击Button为其添加单击事件，并在default.aspx.cs 中添加如下代码

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Workflow.Runtime;using System.Workflow.Runtime.Hosting;using System.Workflow.ComponentModel;using System.Workflow.Activities;namespace AspNet{ public partial class _Default : System.Web.UI.Page { string Result = string.Empty; protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { StartWorkflow(); Label1.Text = Result; } private void StartWorkflow() { WorkflowRuntime workflowRuntime = Application["WorkflowRuntime"] as WorkflowRuntime; ManualWorkflowSchedulerService scheduler = workflowRuntime.GetService(typeof(ManualWorkflowSchedulerService)) as ManualWorkflowSchedulerService; workflowRuntime.WorkflowCompleted += new EventHandler(workflowRuntime_WorkflowCompleted); Dictionary wfPara = new Dictionary(); wfPara.Add("Name", TextBox1.Text); WorkflowInstance workflowInstance = workflowRuntime.CreateWorkflow(typeof(WF.Workflow1), wfPara); workflowInstance.Start(); scheduler.RunWorkflow(workflowInstance.InstanceId); } void workflowRuntime_WorkflowCompleted(object sender, WorkflowCompletedEventArgs e) { if (e.OutputParameters.ContainsKey("Result")) { Result = (string)e.OutputParameters["Result"]; } } }}

好了，下面，在WF项目中的Workflow1，拖入一个Code控件，如下图

为CodeActivety1.添加事件代码，方法名字可以自己取，也可以用默认的，我这里用了一个Exefun的方法名，

代码如下

namespace WF{ public sealed partial class Workflow1 : SequentialWorkflowActivity { public string Name { get; set; } public string Result { get; set; } public Workflow1() { InitializeComponent(); } private void ExeFun(object sender, EventArgs e) { Result = "你好：" + Name; } }}

好了，编译一下程序，在TextBox中输入字符串，点击按钮看一下。