再发一个WF的例子演示

DelayActivity,ListenActivity,CallExternalMethodActivity,HandleExternalEventActivity实现申请,审批,超时否决的演示
使用Winform作为客户端
使用WCF作为客户端与服务器的通信方式
代码很短,很适合正在学习WF,并想快速将WF应用到商业开发的人

例子是在Windwos server 2008 ,VS2008 ,NET3.5下写的
下载   http://files.cnblogs.com/foundation/wxwinter3.rar

应用场景说明:


 流程设计



使用说明
1.启动引擎服务


2.客户端提交申请




3.审批者登录



4.审批者审批


5.申请者查看审批结果




引擎服务的全部代码

namespace  WorkflowConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            DataSet1 ds = new DataSet1();
            WorkflowRuntime workflowRuntime = new WorkflowRuntime();
            ExternalDataExchangeService exchange = new ExternalDataExchangeService();
            workflowRuntime.AddService(exchange);
            exchangeEvent obj = new exchangeEvent(ds);
            exchange.AddService(obj);
            control ctrl = new control(workflowRuntime, obj);
            string WCFurl = "http://localhost:567/wxwinter/";
            ServiceHost host = new ServiceHost(ctrl, new Uri(WCFurl));
            string WCFClassName = "wxdTest"; 
            host.AddServiceEndpoint(typeof(Icontrol), new BasicHttpBinding(), WCFClassName);
            host.Open();
            Console.WriteLine("引擎已启动");
            Console.Read();
        }
    }

    class exchangeEvent : IExternalEvent
    {
        DataSet1 ds;
        public exchangeEvent(DataSet1 v)
        {ds = v;}
        public event EventHandler<NextStepEventArgs> ApproveEvent;

        public void Approve(string gid, string userResult)
        {
            Guid guid = new Guid(gid);
            NextStepEventArgs e = new NextStepEventArgs(guid);
            e.result = userResult;
            ApproveEvent(null, e);
         
        }

        public System.Data.DataSet  GetApproverTask(string username)
        {
            System.Data.DataView dv = new System.Data.DataView(ds.infoTab);
            dv.RowFilter = string.Format("[approver]='{0}' and [state] = 1", username);
            System.Data.DataSet temp = new System.Data.DataSet();
            temp.Tables.Add(dv.ToTable());
            return temp;
            
        }

        public System.Data.DataSet GetProposerTask(string username)
        {
            System.Data.DataView dv = new System.Data.DataView(ds.infoTab);
            dv.RowFilter = string.Format("[proposer]='{0}'", username);
            System.Data.DataSet temp = new System.Data.DataSet();
            temp.Tables.Add(dv.ToTable());
            return temp;
        }
        
        public void Notify(dataform df)
        {
            System.Data.DataView dv = new System.Data.DataView(ds.infoTab);
            dv.RowFilter = string.Format("[guid]='{0}'", df.guid);
            switch  (df.state)
            {
                case 1: 
                DataSet1.infoTabRow r = ds.infoTab.NewinfoTabRow();
                r.guid = df.guid;
                r.approver = df.approver;
                r.content = df.content;
                r.proposer = df.proposer;
                r.result = df.result;
                r.state = df.state;
                ds.infoTab.Rows.Add(r);
                break;
                case 2:
              
                ((DataSet1.infoTabRow)dv[0].Row).state = df.state;
                ((DataSet1.infoTabRow)dv[0].Row).result = df.result;

                break;
                case 3 :

                ((DataSet1.infoTabRow)dv[0].Row).state = df.state;
                break ;
            } 
        }
    }

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    class control : Icontrol
    {
        WorkflowRuntime workflowRuntime;
        exchangeEvent obj;
        public control(WorkflowRuntime r, exchangeEvent o)
        {
            workflowRuntime = r;
            obj = o;
        }
        public void begingWF(string proposer, string approver, string content)
        {
            Dictionary<string, object> dc = new Dictionary<string, object>();
            dataform df = new dataform();
            df.approver = approver;
            df.content = content;
            df.proposer = proposer;
            df.result = "";
            dc.Add("DF", df);
            WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(Workflow1), dc);
            instance.Start();
        }

        public void Approve(string guid, string result)
        {obj.Approve(guid, result);}

        public System.Data.DataSet GetApproverTask(string username)
        { return obj.GetApproverTask(username);}

        public System.Data.DataSet GetProposerTask(string username)
        { return obj.GetProposerTask(username);}
    }

  [ServiceContract]
   public interface Icontrol
    {
        [OperationContract]
        void Approve(string guid, string result);
        [OperationContract]
        void begingWF(string proposer, string approver, string content);
        [OperationContract]
        System.Data.DataSet GetApproverTask(string username);
        [OperationContract]
        System.Data.DataSet GetProposerTask(string username);
    }
}

补充一点,对于流程结节的控制,我更喜欢用规则实现,具体见
规则引擎    http://www.cnblogs.com/foundation/archive/2007/08/18/860911.html
这个例子