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
%>