状态机工作流.实列.报销审批流程(二)

Web.Config

配置了一些工作流服务
WorkflowRuntime 加载的，ManualWorkflowSchedulerService 和 ExternalDataExchangeService
ExternalDataExchangeService 加载的，上篇文章中的 MyWorkflows.BillServer

Global.asax,App_Code\Global.asax.cs

启动 WorkflowRuntime，加载 FileWorkflowPersistenceService（自定义的状态保存服务，下篇文章详细讲解）

代码


protected void Application_Start(object sender, EventArgs e)
{
Console.WriteLine("Application_Start:");
System.Workflow.Runtime.WorkflowRuntime workflowRuntime = new System.Workflow.Runtime.WorkflowRuntime(MyWorkHelpr.WorkflowRuntimeName);

//加载状态保持服务（自己的类），构造函数设置保存状态的路径
FileWorkflowPersistenceService f28s = new FileWorkflowPersistenceService(Server.MapPath("~/App_Data/XOM.WFDB/"));
workflowRuntime.AddService(f28s);

Application[MyWorkHelpr.WorkflowRuntimeName] = workflowRuntime;
//映射事件没用上
workflowRuntime.WorkflowCompleted += new EventHandler<System.Workflow.Runtime.WorkflowCompletedEventArgs>(workflowRuntime_WorkflowCompleted);
workflowRuntime.WorkflowTerminated += new EventHandler<System.Workflow.Runtime.WorkflowTerminatedEventArgs>(workflowRuntime_WorkflowTerminated);
workflowRuntime.WorkflowSuspended += new EventHandler<System.Workflow.Runtime.WorkflowSuspendedEventArgs>(workflowRuntime_WorkflowSuspended);
workflowRuntime.WorkflowPersisted += new EventHandler<System.Workflow.Runtime.WorkflowEventArgs>(workflowRuntime_WorkflowPersisted);
workflowRuntime.StartRuntime();

//重状态保存读取所有没执行完的了类.
foreach (Guid id in f28s.GetAllWorkflows())
{
workflowRuntime.GetWorkflow(id);
}

}

Default.aspx （用户登陆）

导航页面，可以模拟各种角色登陆，可以显示全部正在进行的工作流信息、可以查看工作流的结构



代码说明
取得工作流结构

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
int i = 0;
if (e.CommandName.ToLower() == "select")
{//就想取两级就不递归了

i = Convert.ToInt32(e.CommandArgument);
string sguid = GridView1.Rows[i].Cells[1].Text.Trim();
Guid instanceId = new Guid(sguid);

WorkflowInstance workInstance = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetWorkflow(instanceId);
StateMachineWorkflowActivity MainActivity = workInstance.GetWorkflowDefinition() as StateMachineWorkflowActivity;
TreeView1.Nodes.Clear();

TreeNode MainNode = new TreeNode();
TreeNode NodeL1 = null;
TreeNode NodeL2 = null;
MainNode.Text = sguid;
foreach(StateActivity state in MainActivity.Activities)
{

NodeL1 = new TreeNode();
NodeL1.NavigateUrl="#";
NodeL1.Text = state.Name + ":" +state.Description;
foreach(CompositeActivity cactive in state.Activities)
{
NodeL2 = new TreeNode();
NodeL2.NavigateUrl = "#";
NodeL2.Text = cactive.Name + ":" + cactive.Description;
NodeL1.ChildNodes.Add(NodeL2);

}
MainNode.ChildNodes.Add(NodeL1);
}
MainNode.ExpandAll();
TreeView1.Nodes.Add(MainNode);

//btnReadGuid_Click(btnReadGuid, null);
}
}

CreateBill.aspx （创建修改报销单）

填写表单，根据金额判断跳转到老板，还是财务（跳转是在ASP.net程序中控制的，其实也可以在工作流里控制，有情趣的可以自己改改）



代码


protected void btnOk_Click(object sender, EventArgs e)
{
if(TextBox1.Text.Length>0)
{
Guid InstanceId = new Guid(TextBox1.Text);
BillServer billserver = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetService<BillServer>();

ManualWorkflowSchedulerService scheduler = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetService<ManualWorkflowSchedulerService>();

decimal money = decimal.Parse(txt3.Text);
if (money < 1) return;

string wsPath = HttpContext.Current.Server.MapPath("~/App_Data/WorkflowSave/");
//如果已经有数据取得
BillModel model = FileTools.XmlDeserializeObject(wsPath
, InstanceId
, typeof(BillModel)) as BillModel;

if (model==null) model = new BillModel();

model.BillId = txt1.Text;
model.Money = money;
model.UserName = txt2.Text;

if(model.Money > 1000)
{//流转到老板
billserver.RaiseEvent("BillInitMoneyMax", InstanceId);
}
else
{//流转到财务
billserver.RaiseEvent("BillInitMoneyMin",InstanceId);
}

//流转工作流
scheduler.RunWorkflow(InstanceId);
TextBox1.Text="";
//保存更改的数据
FileTools.XmlSerializeObject(wsPath
, InstanceId
, model);
//this.Response.Redirect("default.aspx", false);
}
}

Finance.aspx （财务）

页面加载显示财务应该处理的流程，选择一个正在进行的流程进行审批，动态取得审批方式到下拉框（审批方式是工作流设计器上设计的）、如果需要可以动态增加一个老板加签



代码说明
动态取得审批方式到下拉框的代码

protected void btnReadGuid_Click(object sender, EventArgs e)
{

string s = txtGuid.Text.Trim();
if(s.Length>0)
{
Guid instanceId = new Guid(s);
//取得当前工作流里正在进行的 StateMachineWorkflow （这里是 stateFinance）
StateMachineWorkflowInstance stateInstance = new StateMachineWorkflowInstance(Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime, instanceId);

using(DataTable dt = new DataTable())
{

//创建一个下拉框用的 DataTable
dt.Columns.Add("NID", typeof(string)); //保存 EventDrivenActivity 的名字,在确定时使用
dt.Columns.Add("NTEXT", typeof(string)); //保存 EventDrivenActivity 的说明
dt.Rows.Add("-1","==请选择==");

int i=0;

foreach(Activity act in stateInstance.CurrentState.EnabledActivities)
{//循环当前流程可以用的 Activitie （在本步骤就是设计器里的 stateFinance 中的那些 EventDrivenActivity）

if (act is EventDrivenActivity )
{
EventDrivenActivity edact = (EventDrivenActivity)act;

if (edact.EnabledActivities.Count >0 && edact.EnabledActivities[0] is HandleExternalEventActivity)
{//取得每个 EventDrivenActivity 中第一个 HandleExternalEventActivity 把名字和说明放到 dt 中
dt.Rows.Add(edact.Name, act.Description);
}
}
i++;
}

//DataBind
DropDownList1.DataValueField = "NID";
DropDownList1.DataTextField = "NTEXT";
DropDownList1.DataSource = dt;
DropDownList1.DataBind();

}
}
}

动态加签的代码

protected void Button2_Click(object sender, EventArgs e)
{
string s = txtGuid.Text.Trim();

if(s.Length>0)
{
Guid instanceId = new Guid(s);
WorkflowInstance workInstance = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetWorkflow(instanceId);
//取得整个工作流对象
StateMachineWorkflowActivity activity = (StateMachineWorkflowActivity)workInstance.GetWorkflowDefinition();
//用 WorkflowChanges 榜定 activity
WorkflowChanges wfc = new WorkflowChanges(activity);
//取得财务的 StateActivity
StateActivity state = (StateActivity)wfc.TransientWorkflow.Activities["stateFinance"];

if(state.Activities["eveToBoss"]!= null ) return;

//声明一个外部事件
HandleExternalEventActivity externalEveTmp = new HandleExternalEventActivity();
externalEveTmp.EventName = "BillInsert";
externalEveTmp.InterfaceType = typeof(MyWorkflows.IBILLService);
externalEveTmp.Name = "externalEveTmp";

//设置一个跳转
SetStateActivity setActTmp = new SetStateActivity();
setActTmp.Name = "setActTmp";
setActTmp.TargetStateName = "stateBoss";

EventDrivenActivity EventDrivenTmp = new EventDrivenActivity();

EventDrivenTmp.Activities.Add(externalEveTmp);
EventDrivenTmp.Activities.Add(setActTmp);
EventDrivenTmp.Description = "*老板加签*";
EventDrivenTmp.Name = "eveToBoss";
//挂起
workInstance.Suspend("正在加签");

//财务的 StateActivity 中加入一个 EventDrivenActivity
state.Activities.Add(EventDrivenTmp);

ValidationErrorCollection err = wfc.Validate();
//应用更改
workInstance.ApplyWorkflowChanges(wfc);
//恢复
workInstance.Resume();

btnReadGuid_Click(btnReadGuid,new EventArgs());

}
}

确定按扭时使用 下拉框 里的审批方式

protected void Button1_Click(object sender, EventArgs e)
{
string s = txtGuid.Text.Trim();
if (s.Length > 0 && DropDownList1.SelectedValue != "-1")
{
//取得下拉框选择的 value btnReadGuid_Click 中取得的
string nid = DropDownList1.SelectedValue;

Guid instanceId = new Guid(s);

BillServer billserver = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetService<BillServer>();
ManualWorkflowSchedulerService scheduler = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetService<ManualWorkflowSchedulerService>();

StateMachineWorkflowInstance stateInstance = new StateMachineWorkflowInstance(Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime, instanceId);
//通过名称取得 EventDrivenActivity
EventDrivenActivity edact = (EventDrivenActivity)stateInstance.CurrentState.Activities[nid];
//和第一个 HandleExternalEventActivity
HandleExternalEventActivity heva = (HandleExternalEventActivity)edact.EnabledActivities[0];

//WorkflowInstance workInstance = stateInstance.WorkflowInstance;
//BillWorkflow act = stateInstance.WorkflowInstance.GetWorkflowDefinition() as BillWorkflow;

string wsPath = HttpContext.Current.Server.MapPath("~/App_Data/WorkflowSave/");
BillModel model = FileTools.XmlDeserializeObject(wsPath
, instanceId
, typeof(BillModel)) as BillModel;

model.LastRemark = model.Fremark = string.Concat("财务: ", DropDownList1.SelectedItem.Text, ":", txtRemark.Text);

//通过 HandleExternalEventActivity.EventName 调用 BillServer.RaiseEvent 触发外部事件使工作流向前运行
//这就是我为上一章何在 BillServer 重写那些事件的原因
billserver.RaiseEvent(heva.EventName, instanceId);

//工作流向下流转
scheduler.RunWorkflow(instanceId);

FileTools.XmlSerializeObject(wsPath,instanceId,model);
DropDownList1.Items.Clear();
txtGuid.Text = "";
//stateInstance.CurrentStateName
return;
// //如果用过一次要删除
// if(edact.Name == "eveToBoss") //删除加签
// {

// //WorkflowInstance workInstance = (Application[MyWorkHelpr.WorkflowRuntimeName] as WorkflowRuntime).GetWorkflow(instanceId);
// workInstance.Suspend("正在删除加签");

// StateMachineWorkflowActivity activity = workInstance.GetWorkflowDefinition() as StateMachineWorkflowActivity;

// WorkflowChanges wfc = new WorkflowChanges(activity);

// //StateActivity sa = wfc.TransientWorkflow.Activities["stateFinance"] as StateActivity;

// StateActivity state = (StateActivity)wfc.TransientWorkflow.Activities["stateFinance"];
// state.Activities.Remove(state.Activities["eveToBoss"]);

// ValidationErrorCollection err = wfc.Validate();
// workInstance.ApplyWorkflowChanges(wfc);
// workInstance.Resume();

// //this.Response.Redirect("");

// }

}
}

Boss.aspx （老板）

页面加载显示老板应该处理的流程，选择一个正在进行的流程进行审批，动态取得审批方式到下拉框

PayBox.aspx （出纳）

页面加载显示出纳应该处理的流程，选择一个正在进行的流程进行审批，动态取得审批方式到下拉框

OutMoney.aspx（取钱确认）

页面加载子显示出纳审批Ok 的流程，选择一个正在进行的流程确认以读取，动态取得审批方式到下拉框

说明
其实重财务以后的页面处理方式都基本是一样的，界面也都类似，不再多说...