how to create stored procedure for this query? - asp.net

Question

I want write a stored procedure for this query!
My query is:
SELECT *
FROM [dbo].[Table_asbabbazi]
WHERE
name_product LIKE '%'+'ibm'+ '%'
AND first_price BETWEEN 5000 AND 100000
AND collection_1 = 'collection1'
AND id_state = 8
I wrote a dynamic stored procedure like this :
ALTER PROCEDURE [dbo].[Asbabbazi_A]
#name_product nvarchar(50),
#first_price int,
#final_price int,
#collection_1 nvarchar(30),
#id_state tinyint
AS
BEGIN
DECLARE #SQLstring nvarchar(1000)
DECLARE #PARAMS nvarchar(1000)
SET #SQLstring = 'SELECT IDproduct, name_product, first_price, final_price, max_registered_price, final_date_view_shamsi, count_views, image_1 FROM dbo.Table_asbabbazi WHERE active= 0 '
if(#name_product != 'no name')
set #SQLstring = #SQLstring + ' AND name_product LIKE '''+ '%' + #name_product + '%' + ''''
if (#final_price != 0)
set #SQLstring = #SQLstring + ' AND first_price between #first_price AND #final_price'
if (#collection_1 != 'انتخاب کنید')
set #SQLstring = #SQLstring + ' AND collection_1 = #collection_1'
if (#id_state != 0)
set #SQLstring = #SQLstring + ' AND id_state = #id_state '
set #PARAMS='#name_product nvarchar(50),
#first_price int,
#final_price int,
#collection_1 nvarchar(30),
#id_state tinyint'
EXECUTE sp_executesql #SQLstring, #PARAMS, #name_product, #first_price, #final_price, #collection_1, #id_state
END
This stored procedure worked but there is a problem: when set value for the name_product it shows one product or any product. I test query in SQL Server Management Studio and it works properly. But this query in stored procedure does not work properly. I think problem is in this row
if(#name_product != 'no name')
set #SQLstring = #SQLstring + ' AND name_product LIKE '''+ '%' + #name_product + '%' + ''''
Please help

Answer 1

Change Your Query Like this:
Use print #SQLstring for Debugging Query
DECLARE #SQLstring nvarchar(1000)
DECLARE #PARAMS nvarchar(1000)
set #SQLstring = 'SELECT IDproduct,name_product,first_price,final_price,max_registered_price,
final_date_view_shamsi,
count_views,image_1 from dbo.Table_asbabbazi where active= 0 '
if(#name_product != 'no name')
set #SQLstring = #SQLstring + ' AND name_product LIKE '''+ '%' + #name_product + '%' + ''''
if (#final_price != 0)
set #SQLstring = #SQLstring + ' AND first_price between '+CAST(#first_price as nvarchar(10))+' AND
'+CAST(#final_price as nvarchar(10))+''
if (#collection_1 != 'انتخاب کنید')
set #SQLstring = #SQLstring + ' AND collection_1 = '''+#collection_1 +''' '
if (#id_state != 0)
set #SQLstring = #SQLstring + ' AND id_state = '+CAST(#id_state as nvarchar(10))
set #PARAMS='#name_product nvarchar(50),
#first_price int,
#final_price int,
#collection_1 nvarchar(30),
#id_state tinyint'
print #SQLstring
EXECUTE sp_executesql #SQLstring,
#PARAMS,
#name_product,
#first_price,
#final_price,
#collection_1,
#id_state

Answer 2

You have extra quotes in your like statement cahnge your statement like this
' AND name_product LIKE ''%' + #name_product + '%'''
Here is your full SP
ALTER PROCEDURE [dbo].[Asbabbazi_A]
#name_product nvarchar(50),
#first_price int,
#final_price int,
#collection_1 nvarchar(30),
#id_state tinyint
AS
BEGIN
DECLARE #SQLstring nvarchar(1000)
DECLARE #PARAMS nvarchar(1000)
set #SQLstring = 'SELECT IDproduct,name_product,first_price,final_price,max_registered_price,
final_date_view_shamsi,
count_views,image_1 from dbo.Table_asbabbazi where active= 0 '
if(#name_product != 'no name')
set #SQLstring = #SQLstring + ' AND name_product LIKE ''%' + #name_product + '%'''
if (#final_price != 0)
set #SQLstring = #SQLstring + ' AND first_price between #first_price AND #final_price'
if (#collection_1 != 'انتخاب کنید')
set #SQLstring = #SQLstring + ' AND collection_1 = #collection_1'
if (#id_state != 0)
set #SQLstring = #SQLstring + ' AND id_state = #id_state '
set #PARAMS='#name_product nvarchar(50),
#first_price int,
#final_price int,
#collection_1 nvarchar(30),
#id_state tinyint'
EXECUTE sp_executesql #SQLstring,
#PARAMS,
#name_product,
#first_price,
#final_price,
#collection_1,
#id_state
END