C# 基于SQL Server存储过程网页中的下拉值筛选数据
我想根据C# 基于SQL Server存储过程网页中的下拉值筛选数据,c#,sql,sql-server,sql-server-2008,stored-procedures,C#,Sql,Sql Server,Sql Server 2008,Stored Procedures,我想根据产品类别、产品子类别和年份筛选项目的数据。我有三个下拉列表，分别是ProductCategory、ProductSubCategory和YEAR，根据用户选择，我希望显示数据 用户可以根据任何下拉选择筛选数据，id用户不选择任何内容，默认情况下，它应该显示所有记录 我需要编写一个包含3个参数的存储过程，以使其正常工作，有人建议我使用以下查询 SELECT * FROM Products WHERE (CatID = 0 OR CatID IS NULL) AND (CatSu
产品类别产品子类别年份项目ProductCategoryProductSubCategoryYEARSELECT *
FROM Products
WHERE (CatID = 0 OR CatID IS NULL)
AND (CatSubID = 0 OR CatSubID IS NULL)
AND (DATEPART(YY, PubDate) = 0 OR DATEPART(YY, PubDate) IS NULL)
Null00CatIDCatSubID00产品ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
2 Title 2 2012-12-31 1 0 0
3 Title 3 2016-12-19 0 5 0
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
6 Title 6 2016-12-19 0 7 5
ID Title PubDate Visible CatID CatSubID
------------------------------------------------------------
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
1 Title 1 2016-11-07 1 7 5
4 Title 4 2014-11-07 1 7 5
5 Title 5 2015-12-19 1 7 5
6 Title 6 2016-12-19 0 7 5
DECLARE @CatID INT=0,
@CatSubID INT=0,
@YEAR INT=0
SELECT *
FROM #your_table
WHERE ( catid = CASE
WHEN @CatID = 0 THEN catid
ELSE @CatID
END )
AND ( catsubid = CASE
WHEN @CatSubID = 0 THEN catsubid
ELSE @CatSubID
END )
AND ( Year(pubdate) = CASE
WHEN @YEAR = 0 THEN Year(pubdate)
ELSE @YEAR
END )
我想你想要这个-如果其中一个参数为零，你跳过该参数的OR子句的后半部分-你忽略它，换句话说
CREATE PROCEDURE procProducts
@catid INT,
@catsubid INT,
@year INT
AS
BEGIN
SELECT *
FROM Products
WHERE (@CatID = 0 OR @CatID = CatID)
AND (@CatSubID = 0 OR @CatSubID = CatSubID)
AND (@year = 0 OR @year = DATEPART(YY,PubDate))
END
GO
exec procProducts 0, 0, 0
考虑到您的上述查询，您可以使用简单的解决方案：
CREATE TABLE [dbo].[MyTable](
[ID] [int] NULL,
[Title] [nvarchar](250) NULL,
[PubDate] [datetime] NULL,
[Visible] [bit] NULL,
[CatID] [int] NULL,
[CatSubID] [int] NULL
) ON [PRIMARY]
GO
create procedure Filter
@CatID int
,@CatSubID int
,@Year int
as
begin
select * from MyTable
where CatID=@CatID and CatSubID=@CatSubID and year(PubDate)=@Year
end
我以前试过这个但没有得到正确的数据你确定吗？我很确定它是有效的。。。无论如何，输出与您的所有示例案例都匹配。是的，我错了，它似乎起作用了，让我检查所有条件。我只想提到您的查询作为查询工作，但当我将此作为存储过程时，如果我将0值传递给year，则它不起作用。虽然
@PP006PubDateDATEDATETIME2（n）YearINTvarcharCatIdCatSubIdINTFilterINT