CODEWITHSUNDEEP
asp.netlinqstored-procedures
Tarik
Tarik

Reputation: 81821

Prevent nullable parameter in stored procedure with LINQ

I want to define stored procedure parameters which do not allow null arguments.

alt text http://www.pixelshack.us/images/xg3mr2xw0q13z22nal.jpg

That @MailItemId int OUTPUT will be not nullable because when I import the stored procedure into the LINQ to SQL designer it says @MailIetmid is ref int? mailItemId.

alt text http://www.pixelshack.us/images/er80hukg27lreiy9b83y.jpg

Thanks.

Upvotes: 3

Views: 2544

Answers (4)

shahkalpesh
shahkalpesh

Reputation: 33484

You could create a function instead that returns an INT.

On the other hand, it is possible from SQL point of view that a NULL can be returned from function. I don't know how code generator will generate function for that. If it still returns a nullable int, I don't think it could be possible.

Upvotes: 0

Rex M
Rex M

Reputation: 144202

If nothing else, you can just modify the auto-generated code (in designer.cs) to not accept a nullable integer. If the parameter ever does end up being null, it will probably cause a weird exception down in the LINQ to SQL code, but that's not a huge deal.

Upvotes: 2

Greg Beech
Greg Beech

Reputation: 136727

No, you can't do this. Types in SQL Server can always be NULL.

Upvotes: 1

DigitalZebra
DigitalZebra

Reputation: 41613

You can specify a default value instead:

@MailItemId int OUTPUT = 0

or something like that

Upvotes: -2

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