我存储过程里想实现多个传入参数的判断,里面有7个传入参数条件.

CREATE PROCEDURE sp_tbWasteSource_Search

(

@sd   datetime,           //开始日期

@ed   datetime,           //结束日期

@con1 varchar(50),

@con2 varchar(30),

@con3 varchar(5),

@con4  varchar(10),

@con5 varchar(4)

)

AS

declare @sql varchar(1000)

begin

set @sql='SELECT * FROM table '

if  @sd!='' and @ed!=''

begin

set @sql=@sql+' where CosID= '+cast(@CosID as varchar)

end

if (@CosName!= '' and @CosID!='')

begin

set @sql=@sql+'and'+'  CosName=  '+cast (@CosName as varchar )

end

else

if (@CosName!='' and @CosID ='')

begin

set @sql=@sql+'where '+'  CosName=  '+cast (@CosName as varchar )

end

if @CosCredit!= '' and (@CosID!='' or @CosName!='')

begin

set @sql=@sql+' and  CosCredit=  '+cast (@CosCredit as varchar )

end

else

if @CosCredit!='' and @CosID=''and @CosName=''

set @sql=@sql+'where CosCredit= '+cast (@CosCredit as varchar )

exec (@sql)

end

GO

无论是ADO.NET还是存储过程的组合查询的SQL语句编写方式:select * from temp where (@ServerID='' or ServerID=@ServerID) and (@SName='' or SName=@SName)

SqlParameter param=new SqlParameter("@ServerID",ServerID==-1?String.Empty:ServerID.ToString());//这里的ServerID传递过来是int类型,如果为-1,那么查询全部,传递空串即可,否则传递ServerID,数据库会自动将@ServerID的值转换为int

SqlParameter param=new SqlParameter("@SName",SName); //字符串直接传参数即可，因为可以为空串String.Empty

以下为参考:

CREATE PROCEDURE sp_tbWasteSource_Search

(

@sd datetime=null, //开始日期

@ed datetime=null, //结束日期

@con1 varchar(50),

@con2 varchar(30),

@con3 varchar(5),

@con4 varchar(10),

@con5 varchar(4)

)

as

begin

select * from tb

where (@sd is null or date>@sd) and (@ed is null or date

end

SELECT * FROM table_name

where ((@sd is null and @ed is null) or (sd >= @sd and ed <= @ed)) --sd和ed都是空时,此条件总为true,否则相当于sd >= @sd and ed <= @ed

and (@con1 is null or con1 = @con1) --如果@con1不传值,则此行条件总为true;如果传值,则此行为and con1=@con1

and (@con2 is null or con2 = @con2) --同con1

and (@con3 is null or con3 = @con3) --同con1

and (@con4 is null or con4 = @con4) --同con1

and (@con5 is null or con5 = @con5) --同con1

SELECT * FROM table

where 1=1

and sd>= case when @sd is not null when @sd else sd end

and ed<= case when @ed is not null when @ed else ed end

and CosID= case when @CosID is not null when @CosID else CosID end

and CosName= case when @CosName is not null when @CosName else CosName end

and .....