How to pass a string larger than 200 character to a stored procedure via param

Question

I got stuck with one problem, in my code i have to make a sum request of all article that is present in my datatable, i concatenate all article ID in one string like \'a1,a2,a3\

Answer 1

I had p.Size = 200; inside my method that is adding the Sql parameters, i had to change it to p.Size = 8000; and it's working.

Thanks everybody for the help !

Answer 2

I agree with Sean Lange's comment, and would suggest to use a table valued parameter instead of sending a string and parsing it in sql
To do that, you need to create a user defined table type in your sql server:

CREATE TYPE dbo.ArticleIds as table
(
    Id varchar(10) -- should be the same as Code_article definition!
)
GO

and then use it as

ALTER PROCEDURE [dbo].[GetChargePetrin]
-- Add the parameters for the stored procedure here
    @articlesList dbo.ArticleIds readonly -- Must be readonly!
AS

BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

        SELECT 
        CAST(SUM(CAST(Qa01 AS INT) /CAST(a.CO_UQB_PET AS INT)) AS varchar) as 'qa1',
        CAST(SUM(CAST(Qa02 AS INT) /CAST(a.CO_UQB_PET AS INT)) AS varchar) as 'qa2',
        -- ... more of the same
        CAST(SUM(CAST(Qa60 AS INT) /CAST(a.CO_UQB_PET AS INT)) AS varchar) as 'qa60'
        FROM [PDP_TTP].[dbo].[PDP] p
        INNER JOIN [PDP_TTP].[dbo].[Articles] a ON a.Division=p.Division AND a.Code_article=p.Code_article
        INNER JOIN @articlesList al ON a.Code_article = al.Id
        WHERE CAST(a.CO_UQB_PET AS INT) > 0 

END

To execute a stored procedure with a table valued parameter from c# using ADO.NET, you need to send a parameter with type SqlDbType.Structured and pass a DataTable as it's value.