下面让我们看看这个类的代码:
<%
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","‘’" & sFieldName & "‘’,#2")
case 1
sSQL=replace(sSQL,"#1",sFieldName)
sSQL=replace(sSQL,"#2","‘’" & sFieldName & "‘’,#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<>"" then
sSQL=sSQL & " where " & sWhere
end if
if sOrder<>"" 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
%>
使用方法:
例句:insert into message (incept,sender,title,content,sendtime,flag,issend) values (‘’"&incept(i)&"‘’,‘’"&membername&"‘’,‘’"&title&"‘’,‘’"&message&"‘’,Now(),0,1)
set a =new SQLString ‘创建类对象
a.TableName=" message " ‘设置表名为message
a.SQLType=0 ‘设置查询类型为增加记录
a.AddField " incept", incept(i)
a.AddField " sender ", membername
a.AddField " title ", membername
a.AddField " sender ", title
a.AddField " content ", message
a.AddField " sendtime ", sendtime()
a.AddField " flag", 0
a.AddField " issend ", 1
Response.Write a.ReturnSQl
set a=nothing
延伸阅读
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