c# - 处理 1 或 2 或 3 值的存储过程

Question

我正在使用存储过程在我的数据库中运行一些查询。该值取自查询字符串，然后传递给存储过程。问题是，用户可以选择超过 1 个选项来生成 3 个或更多查询字符串。

例如http://localhost.com/test.aspx?param=76&param2=79

我知道如何从查询中获取值，但我让存储过程接受 1 个或 2 个或 3 个值有点像重载

例如

   setValue (int val)
    {
       this.value = val;
    }

    setValue (double val)
    {
       this.value = (int) val
    }

    setValue (string val)
    {
       try
       {
          this.value = Integer.parseInt(val)
       }
       catch (Exception e)
       {
         System.out.println(e.getMessage());
         return 0;
       }


    }

这是存储过程的副本..

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[getSealRecordID] (@TRANSFER_ID int)
    AS
-- Declare variables


SELECT DISTINCT "FGFSTRANSFERS"."CONSIDERATION", "FGFSTRANSFERS"."AMOUNT_TRANSFER", "FGFSTRANSFERS"."DATE", 
"FGFSTRANSFERS"."TRANSFER_ID", 
CURR = CASE "FGFSTransferDetails"."CURR"
    WHEN 'USD' THEN 'United States Dollars'
    WHEN 'JMD' THEN 'Jamaican Dollars'
    WHEN 'CAD' THEN 'Canadian Dollars'
    WHEN 'GBP' THEN 'POUNDS'
    WHEN 'EUR' THEN 'EUROS'
    END
,"FGFSCUSTOMERS"."CMF_NAME_1", "FGFSCUSTOMERS"."CMF_NAME_2" , "FGFSTransferDetails"."AMOUNT", 
Cons_Curr = CASE "FGFSTransferDetails"."CURR" -- As Cons_Curr, 
    WHEN 'USD' THEN 'United States Dollars'
    WHEN 'JMD' THEN 'Jamaican Dollars'
    WHEN 'CAD' THEN 'Canadian Dollars'
    WHEN 'GBP' THEN 'POUNDS'
    WHEN 'EUR' THEN 'EUROS'
    END

,"FGFSTransferDetails"."DESCRIPTION", "FGFSTransferDetails"."IMID"
 FROM   ("FGFSInvestment"."dbo"."FGFSTransferDetails" "FGFSTransferDetails" INNER JOIN "FGFSInvestment"."dbo"."FGFSTRANSFERS" "FGFSTRANSFERS" ON "FGFSTransferDetails"."TRANSFER_ID"="FGFSTRANSFERS"."TRANSFER_ID") INNER JOIN "FGFSInvestment"."dbo"."FGFSCUSTOMERS" "FGFSCUSTOMERS" ON "FGFSTRANSFERS"."CUSTODIAN"="FGFSCUSTOMERS"."CMF_ACCOUNT"
 WHERE  "FGFSTRANSFERS"."TRANSFER_ID"= @TRANSFER_ID  AND "FGFSTransferDetails"."TRANSFER_ID"=@TRANSFER_ID

Answer 1

您可以在存储过程中使用默认参数:

CREATE PROCEDURE [dbo].[getSealRecordID] 
(   @PARAM int = -1,
    @PARAM2 int = -1,
    @PARAM3 int = -1
)
    AS
...

当然，您必须在 where 子句中处理这些值:

...
WHERE (@PARAM = -1 OR (condition with @PARAM))
  AND (@PARAM1 = -1 OR (condition with @PARAM1))
  AND (@PARAM2 = -1 OR (condition with @PARAM2))