最近因為接手離職同事的公文審批（沒有使用工作流）維護，感覺很麻煩，于是在我開發(fā)的工作流平臺上重新寫了相關(guān)的功能，擴展同事的功能，同時可以支持固定流和任意流功能。

　　固定流就是由發(fā)起人定義審批的步驟，流程按照既定步驟執(zhí)行。

　　任意流就是由發(fā)起人發(fā)起，選擇下一步審批人審批，然后審批再選擇下一步審批人。

　　當(dāng)然公文審批支持的電子簽名的功能也有，但是不作為本篇討論內(nèi)容，還有界面美觀。

　　1.服務(wù)代碼

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.ComponentModel;

namespace StateMachineService
{
[Serializable]
public class DocFlowEventArgs:ExternalDataEventArgs
{
public DocFlowEventArgs(string userID,Guid uninstand): base(uninstand)
{

this.uninstand = uninstand;
this.userID = userID;
}

private Guid uninstand = Guid.Empty;
public Guid Uninstand
{
get { return this.uninstand; }
set { this.uninstand = value; }
}
private string userID = string.Empty;
public string UserID
{
get { return this.userID; }
set { this.userID = value; }
}
}
[ExternalDataExchange]
public interface IDocFlowService
{
event EventHandler<DocFlowEventArgs> Next;
event EventHandler<DocFlowEventArgs> Jump;
event EventHandler<DocFlowEventArgs> Stop;

void SetFixNextApprover(int NextStpeID, string uninstand);
void SetFixEnableApprover(int CurrentStpeID, string uninstand);
void SetAutoNextApprover();
void SetAutoEnableApprover(string uninstand);
void ChangeStatus();
}
[Serializable]
public　 class DocFlowService:IDocFlowService
{
IDAL.IWFreeNode iwfreenode;
Guid T;
string UserID;
Dictionary<string, EventHandler<DocFlowEventArgs>> list =

new Dictionary<string, EventHandler<DocFlowEventArgs>>();
public void RaiseEventer(string eventName,Guid uninstand,string userID)
{
if(list[eventName]!=null)
{
try
{
EventHandler<DocFlowEventArgs> eventHandler=list[eventName];
DocFlowEventArgs args= new DocFlowEventArgs(userID ,uninstand);
args.WaitForIdle = true;
eventHandler.Invoke(null, args );
this.T = uninstand;
this.UserID = userID;
}
catch
{
}
}
}
IDocFlowService 成員#region IDocFlowService 成員

public event EventHandler <DocFlowEventArgs> Next
{
add
{
this.list.Add("Next", value);
}
remove
{
this.list.Remove("Next");
}
}

public event EventHandler <DocFlowEventArgs> Jump
{ add
{
this.list.Add("Jump", value);
}
remove
{
this.list.Remove("Jump");
}
}

public event EventHandler <DocFlowEventArgs> Stop
{
add
{
this.list.Add("Stop", value);
}
remove
{
this.list.Remove("Stop");
}
}

public void ChangeStatus()
{
throw new NotImplementedException();
}

#endregion

IDocFlowService 成員#region IDocFlowService 成員

public void SetFixNextApprover(int NextStpeID,string uninstand)
{
iwfreenode = DALFactory.WFreeNode.CreateInstance();
string script = "update WFreeNode set [ExceteState]=1

where Uninstand='"+uninstand+"'　 and StepID="+NextStpeID;
iwfreenode.Update(script);

//throw new NotImplementedException();
}

#endregion

IDocFlowService 成員#region IDocFlowService 成員

public void SetFixEnableApprover(int CurrentStpeID,string uninstand)
{
iwfreenode = DALFactory.WFreeNode.CreateInstance();
string script = "update WFreeNode set [ExceteState]=

2 where Uninstand='"; +uninstand+ ";' and userID=

'" + this.UserID + "' and StepID=" + CurrentStpeID;
iwfreenode.Update(script);
//throw new NotImplementedException();
}

#endregion

IDocFlowService 成員#region IDocFlowService 成員

public void SetAutoNextApprover()
{

//throw new NotImplementedException();
}
public void SetAutoEnableApprover(string uninstand)
{
iwfreenode = DALFactory.WFreeNode.CreateInstance();
string script = "update WFreeNode set [ExceteState]=2 where

Uninstand='" +uninstand + "' and userID='" + this.UserID + "'";
iwfreenode.Update(script);
}

#endregion
}
}

　現(xiàn)在支持前進,抄送(平臺功能)和終止，還不支持會退和跳批。

　　2.數(shù)據(jù)庫結(jié)構(gòu)

CREATE TABLE [dbo].[DocFlow](
[Uninstand] [uniqueidentifier] NOT NULL,
[UserID] [varchar](50) NOT NULL,
[Date] [datetime] NULL,
[Title] [varchar](400) NULL,
[Remark] [varchar](500) NULL,
[DocLevel] [varchar](50) NULL,
[FlowType] [varchar](10) NULL,
[Depart] [varchar](50) NULL
)

　　3.流程圖

　　 a.

b.

　　3.

　4.

　　流程代碼

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;

namespace StateMachineLibrary
{
public partial class DocFlow: StateMachineWorkflowActivity
{
public static DependencyProperty DocFlowTypeProperty = DependencyProperty.Register("DocFlowType", typeof(string), typeof(DocFlow));
public string DocFlowType
{
get { return (string)base.GetValue(DocFlow.DocFlowTypeProperty); }
set { base.SetValue(DocFlow.DocFlowTypeProperty, value); }
}
public static DependencyProperty StepIDListProperty =

DependencyProperty.Register("StepIDList", typeof

(System.Collections.Generic.List<int>), typeof(DocFlow));
public System.Collections.Generic.List<int> StepIDList
{
get { return (System.Collections.Generic.List<int>)

base.GetValue(DocFlow.StepIDListProperty); }
set { base.SetValue(DocFlow.StepIDListProperty, value); }
}
public static DependencyProperty UninstandProperty =

DependencyProperty.Register("Uninstand",typeof(string),typeof(DocFlow));
public string Uninstand
{
get { return (string)base.GetValue(DocFlow.UninstandProperty); }
set { base.SetValue(DocFlow.UninstandProperty, value); }
}
public static DependencyProperty CurrentIndexProperty =

DependencyProperty.Register("CurrentIndex", typeof(int), typeof(DocFlow));
public int CurrentIndex
{
get { return (int)base.GetValue(DocFlow.CurrentIndexProperty); }
set { base.SetValue(DocFlow.CurrentIndexProperty, value); }
}

private int MaxIndex = 0;
private int MinIndex = 0;

private void autoResearch(object sender, EventArgs e)
{
if(this.DocFlowType.Equals("fix",StringComparison.OrdinalIgnoreCase))
{
this.FindMinMax();
}
}
private void FindMinMax()
{
this.StepIDList.Sort(new Comparison<int>((x, y) => x.CompareTo(y)));
this.MinIndex = this.StepIDList[0];
this.MaxIndex = this.StepIDList[this.StepIDList.Count-1];

this.CurrentIndex = this.MinIndex;
}

private void FixCurrentRemove(object sender, EventArgs e)
{
if (this.DocFlowType.Equals("fix", StringComparison.OrdinalIgnoreCase))
{
this.StepIDList.Remove(this.CurrentIndex);
}
}

private void CheckDocType(object sender, ConditionalEventArgs e)
{
if (this.DocFlowType.Equals( "fix", StringComparison.OrdinalIgnoreCase))
{
e.Result = true;
}
else
{
e.Result = false;
}
}

private void CurrentIsOve(object sender, ConditionalEventArgs e)
{
if (this.StepIDList.FindAll(p => p == this.CurrentIndex).Count == 0)
{
e.Result = true;

}
else
{
e.Result = false;
}
}

private void CalCurrentStep(object sender, EventArgs e)
{
this.StepIDList.Sort(new Comparison<int>((x, y) => x.CompareTo(y)));
if(this.StepIDList.Count>0)
{
this.CurrentIndex = this.StepIDList[0];
}
}

private void FixIsFinal(object sender, ConditionalEventArgs e)
{
if (this.CurrentIndex == this.MaxIndex && this.StepIDList.FindAll(p =>

p == this.CurrentIndex).Count <= 1)
{
e.Result = true;
}
else
{
e.Result = false;
}
}

private void GetWorkflowID(object sender, EventArgs e)
{
this.Uninstand = this.WorkflowInstanceId.ToString();
}

}

}

　　主要是StepIDList用于記錄固定工作流的步驟序號，DocFlow用于記錄工作流類型 CurrentIndex 記錄當(dāng)前步驟號

　　其它的就是分析最小和最大號，找尋下部號，已經(jīng)相關(guān)的流轉(zhuǎn)控制。還有一些是訪問后臺數(shù)據(jù)庫的服務(wù)。

　　用戶操作界面

　　審批界面