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
%>