How to pass null value to Stored procedure

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SQL-Server-2008R2

I want to pass null value to Stored procedure from where i am calling in controller. I am passing it as null but not getting correct records. how to do it?

C#

// my code
//in stored procedure that parameter declred as null
Alter Procedure Proc
 (@flag bit= Null)
As Begin

if @flag is null
 //my select statement
end

//in controller
var data=_entites.GetData(null)//calling SP in controller

want to pass null for some conditions
is it wirte?

Posted 26-Aug-15 0:46am

Member 9579525

Updated 26-Aug-15 1:05am

Maciej Los

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Maciej Los 26-Aug-15 7:07am

Have you tried to call sp from Sql Server Menagement Studio? Does it return correct recordset?

Member 9579525 26-Aug-15 7:54am

Yes. I have tested in Sql server. It return correct records

F-ES Sitecore 26-Aug-15 7:23am

You might need GetData(DBNull.Value) rather than GetData(null).

Member 9579525 26-Aug-15 7:58am

I tried that but it is giving error as "Method has invalid arguments". The datatype is bool for that variable.

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Maciej Los · Answer 1 · 2015-08-26T01:46:00

On the first look - if statement in sp is incorrect.

It should look like:

SQL

DECLARE @flag BIT = NULL

IF (@flag IS NULL)
    PRINT 'Flag is null!'

In case when there is more than 1 line after if statement, you have to "wear" this in BEGIN .. END statement.

SQL

IF (@flag IS NULL)
BEGIN
    PRINT &#39;Flag is null!&#39;
    PRINT &#39;Please stop passing null values!&#39;
END

See: IF...ELSE (Transact-SQL)[^]

Note: please, read F-ES Sitecore[^] comment to the question.