一个改进的ASP生成SQL命令字符串类的代码[已测]

<%
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
************************************
设置表名的属性
Public Property Let TableName(value)
sTableName=value
End Property
设置条件
Public Property Let Where(value)
sWhere=value
End Property
设置排序方式
Public Property Let Order(value)
sOrder=value
End Property
设置查询语句的类型
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（字段名称，字段值）
Public Sub AddField(sFieldName,sValue)
select case iSQLType
case 0
sSQL=replace(sSQL,"{&*#}1",sFieldName & ",{&*#}1")
sSQL=replace(sSQL,"{&*#}2","" & sValue & ",{&*#}2")
case 1
sSQL=replace(sSQL,"{&*#}1",sFieldName)
sSQL=replace(sSQL,"{&*#}2","" & sValue & ",{&*#}1={&*#}2")
case 3
sSQL=replace(sSQL,"{&*#}1",sFieldName & ",{&*#}1")
End Select
End Sub
修改的返回字符串值的函数
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<>"" and iSQLType<>0 then
sSQL=sSQL & " where " & sWhere
end if
if sOrder<>"" and iSQLType<>0 then
sSQL=sSQL & " order by " & sOrder
end if
ReturnSQL=sSQL
End Function
返回SQL语句
Public Function ReturnSQL1()
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<>"" and iSQLType<>0 then
sSQL=sSQL & " where " & sWhere
end if
if sOrder<>"" and iSQLType<>0 then
sSQL=sSQL & " order by " & sOrder
end if
ReturnSQL=sSQL
End Function
清空语句
Public Sub Clear()
sTableName=""
iSQLType=0
sWhere=""
sOrder=""
sSQL=""
End Sub
End class
%>
调用例子：
<%
set a =new SQLString 创建类对象
a.TableName=" message " 设置表名为message
a.where=" issend =9"
a.order=" issend desc"
a.SQLType=0 设置查询类型为增加记录
a.AddField " incept", "2"
a.AddField " sender ", "%3% "
a.AddField " title ", "#"&now&"#"
a.AddField " sender ", "5 "
a.AddField " content ", " 6 "
a.AddField " sendtime ", "7"
a.AddField " flag", 8
a.AddField " issend ", 9
Response.Write a.ReturnSQl
set a=nothing
%>
<%
set a =new SQLString 创建类对象
a.TableName=" message " 设置表名为message
a.where=" issend =9"
a.order=" issend desc"
a.SQLType=0 设置查询类型为增加记录
a.AddField " incept", "2"
a.AddField " sender ", "%3% "
a.AddField " title ", "#"&now&"#"
a.AddField " sender ", "5 "
a.AddField " content ", " 6 "
a.AddField " sendtime ", "7"
a.AddField " flag", 8
a.AddField " issend ", 9
Response.Write a.ReturnSQl
set a=nothing
%>
<%
set a =new SQLString 创建类对象
a.TableName=" message " 设置表名为message
a.where=" issend =9"
a.order=" issend desc"
a.SQLType=0 设置查询类型为增加记录
a.AddField " incept", "2"
a.AddField " sender ", "%3% "
a.AddField " title ", "#"&now&"#"
a.AddField " sender ", "5 "
a.AddField " content ", " 6 "
a.AddField " sendtime ", "7"
a.AddField " flag", 8
a.AddField " issend ", 9
Response.Write a.ReturnSQl
set a=nothing
%>