网上找资料发现的,但是调试的时候发现有一些问题, 改了一下,还有一定的问题,但是可以做一般使用了。 没有考虑数据类型的问题,还有SQL Server 和access的区别,以后有时间再改进吧,不知道效率怎么样。 如果有朋友改进,也麻烦给我发一份。 <% '生成SQL字符串的类。 '原作:无名氏 '改进:aloxy 'E-mail:szyjJ@hotmail.com 'OICQ:331622229 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 '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 '清空语句 Public Sub Clear() sTableName="" iSQLType=0 sWhere="" sOrder="" sSQL="" End Sub End class %> <% '下面是调用的例子,数据类型的问题请继续修改上面的类里的定义,如果有问题可以问我 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 ", " 4 " 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 %> |