一个改进的ASP生成SQL命令字符串类的代码[已测]

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复制代码 代码如下:
<%
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.AddF