开发自定义的SharePoint 顺序工作流

gdrocket

　　假设有这样一个需求：
　　客户需要用Moss2010有个一个请假单(绑定有工作流)，有这样几个用户（角色）：1.Moss (员工)、2.Leader(组长)、3.Manager（经理）、4.Boss（老板）

　　当员工创建请假单时，启动工作流。工作流具体需求为，当员工新建了一张新的请假单时，发送邮件给Leader，请他审批，如果Leader在两天内审批（同意或拒绝）工作流结束，但如果Leader在两天内没有审批，则发送邮件给Manager请求Manager审批，如果Manager再两天内审批（同意或拒绝）工作流结束，如果Manager在两天内没有审批，则发送邮件给Boss,请求他审批该请假单，如果Boss在一天内审批（同意或拒绝）工作流结束，如果Boss在一天内审批没有审批则该单据自动生效（自动审批通过），工作流结束。

　　分析：考虑以上需求用MossoutOfBox 工作流和SharePointdesigner 设计的工作流都不太好实现，因此采用开发自定义的SharePoint顺序工作流。
　　步骤如下：
　　1. 启动VS2010 ->New ->Project->VisualC#->SharePoint->2010 (先择Sequential Workflow,点击OK)

　　选择AskForLeaving这个列表作为该工作流的绑定对象
　　2. VS2010 默认情况下会自动添加一个onWorkflowActivated1，在onWorkflowActivated1下面添加一个WhileActivity, 在 While Activity中添加一个delayActivity, 在WhileActivity下面添加一个 codeActivity：

　　3. 转到代码视图，添加如下代码 (在类中加入如下成员)
        bool isWorkFlowPending = true;   // 用于标记工作流对应的单据是否在等待审批   DateTime startTime = DateTime.Now; // 用于记录工作流启动的时间　　4. 配置 onWorkflowActivated1
　　a. 转到工作流审计界面
　　b. 选中onWorkflowActivated1，在Invoke(Handlers) 中输入OnActived 并按回车，VS会自动创建一个OnActived方法，在其中加入下列代码
             this.startTime = DateTime.Now;// Send mail to Leader for request approval　　

　　5. 配置delayActivity1，将其TimeoutDuration设置为00:05:00，表示该活动将会将工作流延迟5分钟再向下执行（注因为SharePoint的Timer是每五分钟处理一次工作流事件，所以延迟5分钟最长可能让InitializeTimeoutDuration中的代码10才执行一次），在delayActivity1_InitializeTimeoutDuration 中添加如下代码：
if (workflowProperties.Item["Status"].ToString().Equals("Approved") || workflowProperties.Item["Status"].ToString().Equals("Rejected")){this.isWorkFlowPending = false;}else{DateTime now = DateTime.Now;int days = (now - this.startTime).Days;if (days == 2){// Send mail to Manager for request approval                 }else if(days == 4){// Send mail to Boss for request approval      }else if (days == 6){workflowProperties.Item["Status"] = "Approved";workflowProperties.Item.Update();}}　　

　　6. 配置codeActivity1，在codeActivity1_ExecuteCode 中发送邮件通知用户审批结果
// Send mail to theuser notify that record has been approved or rejected　　
发送邮件的代码请参考http://blog.csdn.net/farawayplace613/article/details/6759538
　　以下是完整代码Workflow1.cs：
using System;using System.ComponentModel;using System.ComponentModel.Design;using System.Collections;using System.Drawing;using System.Linq;using System.Workflow.ComponentModel.Compiler;using System.Workflow.ComponentModel.Serialization;using System.Workflow.ComponentModel;using System.Workflow.ComponentModel.Design;using System.Workflow.Runtime;using System.Workflow.Activities;using System.Workflow.Activities.Rules;using Microsoft.SharePoint;using Microsoft.SharePoint.Workflow;using Microsoft.SharePoint.WorkflowActions;namespace SequentailWFDemo.Workflow1{public sealed partial class Workflow1 : SequentialWorkflowActivity{public Workflow1(){InitializeComponent();}public Guid workflowId = default(System.Guid);public SPWorkflowActivationProperties workflowProperties = new SPWorkflowActivationProperties();bool isWorkFlowPending = true;DateTime startTime = DateTime.Now;private void OnActived(object sender, ExternalDataEventArgs e){this.startTime = DateTime.Now;// Send mail to Leader for request approval}private void IsWorkFlowPending(object sender, ConditionalEventArgs e){e.Result = this.isWorkFlowPending;}private void codeActivity1_ExecuteCode(object sender, EventArgs e){// Send mail to the user notify that record has been approved or rejected}private void delayActivity1_InitializeTimeoutDuration(object sender, EventArgs e){if (workflowProperties.Item["Status"].ToString().Equals("Approved") || workflowProperties.Item["Status"].ToString().Equals("Rejected")){this.isWorkFlowPending = false;}else{DateTime now = DateTime.Now;int days = (now - this.startTime).Days;if (days == 2){// Send mail to Manager for request approval                 }else if(days == 4){// Send mail to Boss for request approval      }else if (days == 6){workflowProperties.Item["Status"] = "Approved";workflowProperties.Item.Update();}}}}}　　
Workflow1.designer.csWorkflow1.designer.cs：
using System;using System.ComponentModel;using System.ComponentModel.Design;using System.Collections;using System.Drawing;using System.Reflection;using System.Workflow.ComponentModel.Compiler;using System.Workflow.ComponentModel.Serialization;using System.Workflow.ComponentModel;using System.Workflow.ComponentModel.Design;using System.Workflow.Runtime;using System.Workflow.Activities;using System.Workflow.Activities.Rules;namespace SequentailWFDemo.Workflow1{public sealed partial class Workflow1{#region Designer generated code/// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor./// </summary>[System.Diagnostics.DebuggerNonUserCode]private void InitializeComponent(){this.CanModifyActivities = true;System.Workflow.Activities.CodeCondition codecondition1 = new System.Workflow.Activities.CodeCondition();System.Workflow.ComponentModel.ActivityBind activitybind2 = new System.Workflow.ComponentModel.ActivityBind();System.Workflow.Runtime.CorrelationToken correlationtoken1 = new System.Workflow.Runtime.CorrelationToken();System.Workflow.ComponentModel.ActivityBind activitybind1 = new System.Workflow.ComponentModel.ActivityBind();this.delayActivity1 = new System.Workflow.Activities.DelayActivity();this.codeActivity1 = new System.Workflow.Activities.CodeActivity();this.whileActivity1 = new System.Workflow.Activities.WhileActivity();this.onWorkflowActivated1 = new Microsoft.SharePoint.WorkflowActions.OnWorkflowActivated();// // delayActivity1// this.delayActivity1.Name = "delayActivity1";this.delayActivity1.TimeoutDuration = System.TimeSpan.Parse("00:05:00");this.delayActivity1.InitializeTimeoutDuration += new System.EventHandler(this.delayActivity1_InitializeTimeoutDuration);// // codeActivity1// this.codeActivity1.Name = "codeActivity1";this.codeActivity1.ExecuteCode += new System.EventHandler(this.codeActivity1_ExecuteCode);// // whileActivity1// this.whileActivity1.Activities.Add(this.delayActivity1);codecondition1.Condition += new System.EventHandler<System.Workflow.Activities.ConditionalEventArgs>(this.IsWorkFlowPending);this.whileActivity1.Condition = codecondition1;this.whileActivity1.Name = "whileActivity1";activitybind2.Name = "Workflow1";activitybind2.Path = "workflowId";// // onWorkflowActivated1// correlationtoken1.Name = "workflowToken";correlationtoken1.OwnerActivityName = "Workflow1";this.onWorkflowActivated1.CorrelationToken = correlationtoken1;this.onWorkflowActivated1.EventName = "OnWorkflowItemChanged";this.onWorkflowActivated1.Name = "onWorkflowActivated1";activitybind1.Name = "Workflow1";activitybind1.Path = "workflowProperties";this.onWorkflowActivated1.Invoked += new System.EventHandler<System.Workflow.Activities.ExternalDataEventArgs>(this.OnActived);this.onWorkflowActivated1.SetBinding(Microsoft.SharePoint.WorkflowActions.OnWorkflowActivated.WorkflowIdProperty, ((System.Workflow.ComponentModel.ActivityBind)(activitybind2)));this.onWorkflowActivated1.SetBinding(Microsoft.SharePoint.WorkflowActions.OnWorkflowActivated.WorkflowPropertiesProperty, ((System.Workflow.ComponentModel.ActivityBind)(activitybind1)));// // Workflow1// this.Activities.Add(this.onWorkflowActivated1);this.Activities.Add(this.whileActivity1);this.Activities.Add(this.codeActivity1);this.Name = "Workflow1";this.CanModifyActivities = false;}#endregionprivate DelayActivity delayActivity1;private WhileActivity whileActivity1;private CodeActivity codeActivity1;private Microsoft.SharePoint.WorkflowActions.OnWorkflowActivated onWorkflowActivated1;}}