實(shí)現(xiàn)SQL Server傳送數(shù)組參數(shù)變通的方案描述
下面的文章主要介紹的是實(shí)現(xiàn)SQL Server傳送數(shù)組參數(shù)變通實(shí)際操作辦法,最近一直在做有關(guān)Dnn模塊的開發(fā)這一項(xiàng)目,在其實(shí)際操作的過程中有碰到這么的一個(gè)問題,即需要同時(shí)插入N條數(shù)據(jù),不想在程序里控制,但是SQL Sever又不支持?jǐn)?shù)組參數(shù)。
所以只能用變通的辦法了.利用SQL Server強(qiáng)大的字符串處理傳把數(shù)組格式化為類似"1,2,3,4,5,6"。然后在存儲(chǔ)過程中用SubString配合CharIndex把分割開來.
詳細(xì)的存儲(chǔ)過程
- CREATE PROCEDURE dbo.ProductListUpdateSpecialList
- @ProductId_Array varChar(800),
- @ModuleId int
- AS
- DECLARE @PointerPrev int
- DECLARE @PointerCurr int
- DECLARE @TId int
- Set @PointerPrev=1
- set @PointerCurr=1
- begin transaction
- Set NoCount ON
- delete from ProductListSpecial where ModuleId=@ModuleId
- Set @PointerCurr=CharIndex(',',@ProductId_Array,@PointerPrev+1)
- set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev,@PointerCurr-@PointerPrev) as int)
- Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId)
- SET @PointerPrev = @PointerCurr
- while (@PointerPrev+1 < LEN(@ProductId_Array))
- Begin
- Set @PointerCurr=CharIndex(',',@ProductId_Array,@PointerPrev+1)
- if(@PointerCurr> 0)
- Begin
- set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev+1,@PointerCurr-@PointerPrev-1) as int)
- Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId)
- SET @PointerPrev = @PointerCurr
- End
- else
- Break
- End
- set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev+1,LEN(@ProductId_Array)-@PointerPrev) as int)
- Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId)
- Set NoCount OFF
- if error=0
- begin
- commit transaction
- end
- else
- begin
- rollback transaction
- end
- GO
網(wǎng)友Bizlogic對(duì)此的改進(jìn)方法:
給SQL Server傳送數(shù)組參數(shù)的變通辦法中應(yīng)該用SQL2000 OpenXML更簡(jiǎn)單,效率更高,代碼更可讀:
- CREATE Procedure [dbo].[ProductListUpdateSpecialList]
- (
- @ProductId_Array NVARCHAR(2000),
- @ModuleId INT
- )
- AS
- delete from ProductListSpecial where ModuleId=@ModuleId
- -- If empty, return
- IF (@ProductId_Array IS NULL OR LEN(LTRIM(RTRIM(@ProductId_Array))) = 0)
- RETURN
- DECLARE @idoc int
- EXEC sp_xml_preparedocument @idoc OUTPUT, @ProductId_Array
- Insert into ProductListSpecial (ModuleId,ProductId)
- Select
- @ModuleId,C.[ProductId]
- FROM
- OPENXML(@idoc, '/Products/Product', 3)
- with (ProductId int ) as C
- where
- C.[ProductId] is not null
- EXEC sp_xml_removedocument @idoc
上述的相關(guān)內(nèi)容就是對(duì)SQL Server傳送數(shù)組參數(shù)的變通辦法的描述,希望會(huì)給你帶來一些幫助在此方面。
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