一個改進的ASP產生SQL 命令字串的類

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上載者:User
字串 〈%
class SQLString
'************************************
'變數定義
'************************************
'sTableName ---- 表名
'iSQLType ----SQL語句類型:0-增加,1-更新,2-刪除,3-查詢
'sWhere ---- 條件
'sOrder ---- 排序方式
'sSQL ----值

Private sTableName,iSQLType,sWhere,sOrder,sSQL

'************************************
'類初始化/結束
'************************************

Private Sub Class_Initialize()
sTableName=""
iSQLType=0
sWhere=""
sOrder=""
sSQL=""
End Sub

Private Sub Class_Terminate()

End Sub

'************************************
'屬性
'************************************
'設定表名的屬性
Public Property Let TableName(value)
sTableName=value
End Property
'設定條件
Public Property Let Where(value)
sWhere=value
End Property
'設定排序方式
Public Property Let Order(value)
sOrder=value
End Property
'設定查詢語句的類型

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

'************************************
'函數
'************************************
'增加欄位(欄位名稱,欄位值)

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

'修改的返回字串值的函數
'返回SQL語句
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語句
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

'清空語句

Public Sub Clear()
sTableName=""
iSQLType=0
sWhere=""
sOrder=""
sSQL=""
End Sub
End class
%〉



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