一个整合SQL语句，然后输出SQL的类

[上将军]

<%
class SQLString
'************************************
'变量定义
'************************************
'sTableName ---- 表名
'iSQLType ----SQL语句类型：0-增加，1-更新，2-删除,3-查询
'sWhere ---- 条件
'sOrder ---- 排序方式
'sSQL ----值
Private sTableName,iSQLType,sWhere,sOrder,sSQL

'************************************
'类初始化/结束
'************************************

Private Sub Class_Initialize()
sTableName=""
iSQLType=0
sWhere=""
sOrder=""
sSQL=""
End Sub

Private Sub Class_Terminate()
End Sub

'************************************
'属性
'************************************

Public Property Let TableName(value)
sTableName=value
End Property

Public Property Let Where(value)
sWhere=value
End Property

Public Property Let Order(value)
sOrder=value
End Property

Public property Let SQLType(value)
iSQLType=value
select case iSQLType
case 0
sSQL="insert into #0 (#1) values (#2)"
case 1
sSQL="update #0 set #1=#2"
case 2
sSQL="delete from #0 "
case 3
sSQL="select #1 from #0 "
end select
End Property

'************************************
'函数
'************************************

'增加字段
Public Sub AddField(sFieldName,sValue)
select case iSQLType
case 0
sSQL=replace(sSQL,"#1",sFieldName & ",#1")
sSQL=replace(sSQL,"#2","'" & sFieldName & "',#2")
case 1
sSQL=replace(sSQL,"#1",sFieldName)
sSQL=replace(sSQL,"#2","'" & sFieldName & "',#1=#2")
case 3
sSQL=replace(sSQL,"#1",sFieldName & ",#1")
End Select
End Sub

'返回SQL语句
Public Function ReturnSQL()
sSQL=replace(sSQL,"#0",sTableName)
select case iSQLType
case 0
sSQL=replace(sSQL,",#1","")
sSQL=replace(sSQL,",#2","")
case 1
sSQL=replace(sSQL,",#1=#2","")
case 3
sSQL=replace(sSQL,",#1","")
end Select
if sWhere<>"" then
sSQL=sSQL & " where " & sWhere
end if
if sOrder<>"" then
sSQL=sSQL & " order by " & sOrder
end if
ReturnSQL=sSQL
End Function

'清空
Public Sub Clear()
sTableName=""
iSQLType=0
sWhere=""
sOrder=""
sSQL=""
End Sub
end class
%>

调用方法：
<%
dim a
set a =new SQLString
a.TableName="user"
a.SQLType=0
a.AddField "name","huang"
a.AddField "password","123"
Response.Write a.ReturnSQl
set a=nothing
%>