工作流之公文流转篇

 最近因为接手离职同事的公文审批（没有使用工作流）维护，感觉很麻烦，于是在我开发的工作流平台上重新写了相关的功能，扩展同事的功能，同时可以支持固定流和任意流功能。希望大哥们给予指点。

固定流就是由发起人定义审批的步骤，流程按照既定步骤执行。

任意流就是由发起人发起，选择下一步审批人审批，然后审批再选择下一步审批人。

当然公文审批支持的电子签名的功能也有，但是不作为本篇讨论内容，还有界面美观。

1.服务代码。

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 成员#region IDocFlowService 成员

        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 成员#region IDocFlowService 成员


        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 成员#region IDocFlowService 成员


        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 成员#region IDocFlowService 成员


        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
    }
}

现在支持前进,抄送(平台功能)和终止，还不支持会退和跳批。

2.数据库结构

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.流程图

  a.

b.

2.

3.

4.

流程代码

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用于记录固定工作流的步骤序号，DocFlow用于记录工作流类型 CurrentIndex 记录当前步骤号

其它的就是分析最小和最大号，找寻下部号，已经相关的流转控制。还有一些是访问后台数据库的服务。

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