WF的一个ASPNET例子

很多朋友总是问我如何在ASPNET中使用WF
其实我从来不关心前台用什么实现，不管理是B/S还是C/S
手写了一个ASPNET页与WF工作流例子,
这个例子很简单，例子本身并没有什么价值
希望这个例子能给一些朋友代来其他方面的收获

aspx页面代码

<% @ Page Language = " C# "   %>
< script runat = " server " >
  
// 工作流引擎,使用静态对象,使所有用户都可共享,并在application生命周期存活
public   static  System.Workflow.Runtime.WorkflowRuntime runtime;

// 启动引擎按钮
System.Web.UI.WebControls.Button btStartRuntime  =   new  System.Web.UI.WebControls.Button();

// 得到实例列表按钮
System.Web.UI.WebControls.Button btListInstanct  =   new  System.Web.UI.WebControls.Button();
   
// 实例列表
System.Web.UI.WebControls.RadioButtonList rlList  =   new  System.Web.UI.WebControls.RadioButtonList();


// 创建实例按钮
System.Web.UI.WebControls.Button btCreateInstance  =   new  System.Web.UI.WebControls.Button();

// 下一步按钮
System.Web.UI.WebControls.Button btNext  =   new  System.Web.UI.WebControls.Button();

protected   void  Page_Load( object  sender, EventArgs e)
{
if  (runtime  ==   null )
{
System.Web.HttpContext.Current.Response.Write( " 引擎没有启动<p> " );
}
else
{
System.Web.HttpContext.Current.Response.Write( " 引擎已启动<p> " );
}

//
btStartRuntime.Text  =   " 启动/重新启动引擎 " ;
btStartRuntime.Click  +=   new  EventHandler(btStartRuntime_Click);
form1.Controls.Add(btStartRuntime);

//
btCreateInstance.Text  =   " 创建实例 " ;
form1.Controls.Add( new  System.Web.UI.LiteralControl( " <p> " ));
btCreateInstance.Click  +=   new  EventHandler(btCreateInstance_Click);
form1.Controls.Add(btCreateInstance);
   
//
form1.Controls.Add( new  System.Web.UI.LiteralControl( " <p> " ));
btListInstanct.Text  =   " 得到实例列表 " ;
btListInstanct.Click  +=   new  EventHandler(btListInstanct_Click);
form1.Controls.Add(btListInstanct);

//
form1.Controls.Add( new  System.Web.UI.LiteralControl( " <p> " ));
form1.Controls.Add(rlList);

//
form1.Controls.Add( new  System.Web.UI.LiteralControl( " <p> " ));
btNext.Text  =   " 下一步 " ;
btNext.Click  +=   new  EventHandler(btNext_Click);
form1.Controls.Add(btNext);
}

void  btNext_Click( object  sender, EventArgs e)
{
if  (rlList.SelectedItem  !=   null )
{
System.Workflow.Runtime.WorkflowInstance temp  =  runtime.GetWorkflow( new  Guid(rlList.SelectedItem.Text));
temp.Resume();
System.Threading.Thread.Sleep( 1000 );
}
}

void  btCreateInstance_Click( object  sender, EventArgs e)
{
runtime.CreateWorkflow( typeof (自定义工作流)).Start();
}

void  btListInstanct_Click( object  sender, EventArgs e)
{
rlList.Items.Clear();
foreach  (System.Workflow.Runtime.WorkflowInstance temp  in  runtime.GetLoadedWorkflows())
{
System.Web.UI.WebControls.ListItem li  =   new  ListItem(temp.InstanceId.ToString());
rlList.Items.Add(li);
}

}

void  btStartRuntime_Click( object  sender, EventArgs e)
{
runtime  =   new  System.Workflow.Runtime.WorkflowRuntime();
runtime.Started  +=   new  EventHandler < System.Workflow.Runtime.WorkflowRuntimeEventArgs > (runtime_Started);
runtime.WorkflowCreated  +=   new  EventHandler < System.Workflow.Runtime.WorkflowEventArgs > (runtime_WorkflowCreated);
runtime.StartRuntime();
}



void  runtime_WorkflowCreated( object  sender, System.Workflow.Runtime.WorkflowEventArgs e)
{
System.Web.HttpContext.Current.Response.Write(e.WorkflowInstance.InstanceId.ToString()  +   " 实例建立<p> " );
}

void  runtime_Started( object  sender, System.Workflow.Runtime.WorkflowRuntimeEventArgs e)
{
System.Web.HttpContext.Current.Response.Write( " 引擎启动成功<p> " );
}


class  自定义工作流:System.Workflow.Activities.SequentialWorkflowActivity 
{
/*
 
 [code1(CodeActivity)]
      ↓
 [su1(SuspendActivity)]
      ↓
 [code2(CodeActivity)]
      ↓
 [su1(SuspendActivity)]
      ↓ 
 [code3(CodeActivity)]
 
  */
public  自定义工作流()
{
//
System.Workflow.Activities.CodeActivity code1  =   new  System.Workflow.Activities.CodeActivity( " code1 " );
code1.ExecuteCode  +=   delegate ( object  s, EventArgs ee) {};

//    
System.Workflow.ComponentModel.SuspendActivity su1  =   new  System.Workflow.ComponentModel.SuspendActivity( " su1 " );

//
System.Workflow.Activities.CodeActivity code2  =   new  System.Workflow.Activities.CodeActivity( " code2 " );
code2.ExecuteCode  +=   delegate ( object  s, EventArgs ee) { };

//
System.Workflow.ComponentModel.SuspendActivity su2  =   new  System.Workflow.ComponentModel.SuspendActivity( " su2 " );

//
System.Workflow.Activities.CodeActivity code3  =   new  System.Workflow.Activities.CodeActivity( " code3 " );
code3.ExecuteCode  +=   delegate ( object  s, EventArgs ee) {};


//
this .CanModifyActivities  =   true ;
this .Activities.Add(code1);
this .Activities.Add(su1);
this .Activities.Add(code2);
this .Activities.Add(su2);
this .Activities.Add(code3);
this .CanModifyActivities  =   false ; 
}
}
</ script >

< html  >
< body >
< form id = " form1 "  runat = " server " >
</ form >
</ body >
</ html >

Web.Config文件

<? xml version="1.0" ?>
< configuration >
< system .web >
< compilation >
< assemblies >
< add  assembly ="System.Workflow.Activities, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
< add  assembly ="System.Workflow.ComponentModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
< add  assembly ="System.Workflow.Runtime, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</ assemblies >
</ compilation >
</ system.web >
</ configuration >

保存一下,注意编辑格式,放到IIS里的就可以运行了
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