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eXpressApp Framework 生成单据编号的解决方案(vb.net)

作者：瘦山鸿出处：博客园 2010年02月02日阅读：

eXpressApp Framework (以下简称XAF)是Devexpress公司开发的一套基于.net平台的O/R M快速开发应用架构,其特点是可以快速的开发出基于web和winform的数据库应用程序,在XAF的实际应用开发过程中,我们难免要实现单据编号的自动生成和管理,传统的很多应用系统都是利用存储过程来实现这一目的的,我们知道XAF的是用XPO来和数据库存储系统交互的,有没有办法不用存储过程而直接用XPO来生成和管理应用系统的单据编号呢?经过本人的尝试,答案是肯定的,下面我就把这个实现的实体类和相应的实现函数共享出来,给大家参考,由于水平和时间的关系,代码可能没有那么的顺眼,请大家批评指正:

先给个效果图看看吧:

1.单据编号设定实体类

Imports System
Imports System.ComponentModel

Imports DevExpress.Xpo

Imports DevExpress.ExpressApp
Imports DevExpress.Persistent.Base
Imports DevExpress.Persistent.BaseImpl
Imports DevExpress.Persistent.Validation

<DefaultClassOptions()> _
<System.ComponentModel.DisplayName("单据编号设定")> _
Public Class B_BILLCODEPREX
    Inherits BaseObject
    Public Sub New(ByVal session As Session)
        MyBase.New(session)
    End Sub
    Private FTBNAME As String
    <DevExpress.Xpo.DisplayName("表")> _
    <Custom("AllowEdit", "False")> _
   Public Property TBNAME() As String
        Get
            Return FTBNAME
        End Get
        Set(ByVal value As String)
            SetPropertyValue("TBNAME", FTBNAME, value)

        End Set
    End Property
    Private FTBCAPTION As String
    <DevExpress.Xpo.DisplayName("表名称")> _
    <Custom("AllowEdit", "False")> _
Public Property TBCAPTION() As String
        Get
            Return FTBCAPTION
        End Get
        Set(ByVal value As String)
            SetPropertyValue("TBCAPTION", FTBCAPTION, value)
        End Set
    End Property
    Private FPREX As String
    <DevExpress.Xpo.DisplayName("单据编号前缀")> _
Public Property PREX() As String
        Get
            Return FPREX
        End Get
        Set(ByVal value As String)
            SetPropertyValue("PREX", FPREX, value)
        End Set
    End Property
    Private FLENTH As Integer = 5
    <DevExpress.Xpo.DisplayName("流水号位数")> _
Public Property LENTH() As Integer
        Get
            Return FLENTH
        End Get
        Set(ByVal value As Integer)
            SetPropertyValue("LENTH", FLENTH, value)
        End Set
    End Property
    Private FINTERVAL As String = "-"
    <DevExpress.Xpo.DisplayName("分隔符")> _
Public Property INTERVAL() As String
        Get
            Return FINTERVAL
        End Get
        Set(ByVal value As String)
            SetPropertyValue("INTERVAL", FINTERVAL, value)
        End Set
    End Property
    Public Enum EPREX
        无
        年
        年月
        年月日
    End Enum
    Private FDPREX As EPREX
    <DevExpress.Xpo.DisplayName("日期段")> _
Public Property DPREX() As EPREX
        Get
            Return FDPREX
        End Get
        Set(ByVal value As EPREX)
            SetPropertyValue("DPREX", FDPREX, value)
        End Set
    End Property
End Class

2.单据编号生成函数

Public Function UPDATEBILLCODE(ByVal FBCODE As String, ByVal BO As Object)
2

Dim BILLCODEPREX As B_BILLCODEPREX = Session.FindObject(Of B_BILLCODEPREX)(New BinaryOperator("TBNAME", BO.GetType.Name))
3

If BILLCODEPREX IsNot Nothing Then
4

If BILLCODEPREX.TBNAME IsNot Nothing Then
5

If BO.GetType.Name = BILLCODEPREX.TBNAME.Trim Then
6

Dim BB As String = ""
7

Dim PRE As String = ""
8

If BILLCODEPREX.INTERVAL Is Nothing Then
9

BB = ""
10

Else
11

BB = BILLCODEPREX.INTERVAL.Trim
12

End If
13

If Not BILLCODEPREX.PREX.Trim = Nothing Then
14

PRE = BILLCODEPREX.PREX.ToUpper.Trim & BB
15

Else
16

PRE = ""
17

End If
18

Dim CC As String = ""
19

If Not BILLCODEPREX.DPREX = Nothing Then
20

Select Case BILLCODEPREX.DPREX
21

Case B_BILLCODEPREX.EPREX.年
22

CC = Format(Now.Year, "00").ToString & BB
23

Case B_BILLCODEPREX.EPREX.年月
24

CC = Format(Now.Year, "00").ToString & BB & Format(Now.Month, "00").ToString & BB
25

Case B_BILLCODEPREX.EPREX.年月日
26

CC = Format(Now.Year, "00").ToString & BB & Format(Now.Month, "00").ToString & BB & Format(Now.Day, "00").ToString & BB
27

Case B_BILLCODEPREX.EPREX.无
28

CC = ""
29

End Select
30

Else
31

CC = ""
32

End If
33

Dim fLOWlenth As Integer = 4
34

Dim AA As String = ""
35

If BILLCODEPREX.LENTH > 0 Then
36

fLOWlenth = BILLCODEPREX.LENTH
37

End If
38

For I = 1 To fLOWlenth Step 1
39

AA &= "0"
40

Next
41

FBCODE = PRE & CC & Format(DistributedIdGeneratorHelper.Generate(BO.Session.DataLayer, BO.[GetType]().FullName, CC), AA)
42

Else
43

FBCODE = Format(DistributedIdGeneratorHelper.Generate(BO.Session.DataLayer, BO.[GetType]().FullName, "ERP"), "00000000")
44

End If
45

Else
46

FBCODE = Format(DistributedIdGeneratorHelper.Generate(BO.Session.DataLayer, BO.[GetType]().FullName, "ERP"), "00000000")
47

End If
48

Else
49

FBCODE = Format(DistributedIdGeneratorHelper.Generate(BO.Session.DataLayer, BO.[GetType]().FullName, "ERP"), "00000000")
50

End If
52

Return FBCODE
53

End Function
54

3.调用方法代码

调用方法代码
1    Public Overloads Overrides Sub AfterConstruction()Sub AfterConstruction()
2        MyBase.AfterConstruction()
3        FBILLCODE = UPDATEBILLCODE(FBILLCODE, Me)
4        BKBILLCODE = FBILLCODE
5
6    End Sub
7   Private FBILLCODE As String
8    <Indexed(unique:=True), DevExpress.Xpo.DisplayName("单据编号")> _
9        <VisibleInListView(True)> _
10    Public Property BILLCODE()Property BILLCODE() As String
11        Get
12            Return FBILLCODE
13        End Get
14        Set(ByVal value As String)
15            SetPropertyValue("BILLCODE", FBILLCODE, value)
16        End Set
17    End Property

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