为SQL Server传数组参数的变通办法

发布日期  发布: 2009-1-10 | 发布人  发布者: 有色人生 | 来源  来源: 江西广告网


  最近一直在做Dnn模块的开发,过程中碰到这么一个问题,需要同时插入N条数据,不想在程序里控制,但是SQL Sever又不支持数组参数.所以只能用变通的办法了.利用SQL Server强大的字符串处理传把数组格式化为类似"1,2,3,4,5,6"。      然后在存储过程中用SubString配合CharIndex把分割开来      详细的存储过程      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      网友Bizlogic对此的改进方法:      应该用SQL2000 OpenXML更简单,效率更高,代码更可读:      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 <
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