I am trying to get the return value of a stored procedure. Here is an example of such a stored procedure:
select
Name,
IsEnabled
from
dbo.something
where
ID = @ID
if @@rowcount = 0
return 1
return
This is a simple select. If 0 rows are found, my result set will be null, but I will still have a return value.
This is a bad example, as this is a select, so sure I could find if 0 rows were returned. However, on an Insert, delete, or other calls, we need this return value to know if there was a problem. I have been unable to find a way to get this return value. I can get output values, I can get result sets, but no return value.
I can get the return value if I call SQL manually, or even if I run a SqlCommand
using the Entity Framework, but this is not what I want to do.
Has anyone ever been able to get the return value from a stored procedure using Entity Framework?
Thanks for the help!
Stored procedures do not have a return value but can take a list with input, output, and input-output parameters. Stored procedure calls use the CALL token, as shown below.
Return Value in SQL Server Stored Procedure In default, when we execute a stored procedure in SQL Server, it returns an integer value and this value indicates the execution status of the stored procedure. The 0 value indicates, the procedure is completed successfully and the non-zero values indicate an error.
ExecuteSqlRawAsync returns the number of rows affected for inserts, updates and deletes (-1 for selects).
Stored Procedure in Entity Framework. Entity Framework has the ability to automatically build native commands for the database based on your LINQ-to-Entities or Entity SQL queries, as well as build the commands for inserting, updating, and deleting data.
I guess support of stored procedure return values depends on version of Entity framework. Although directly returning value didn't work for me I managed to get value using OUTPUT stored procedure parameter.
SQL Server stored procedures can return data in three different ways: Via result sets, OUTPUT parameters and RETURN values - see the docs here. I have previously blogged about getting result sets with FromSqlRaw here and here. I have blogged about using OUTPUT parameters with FromSqlRaw here.
There are some limitations on the execution of database stored procedures using FromSql or ExecuteSqlCommand methods in EF Core2: Result must be an entity type. This means that a stored procedure must return all the columns of the corresponding table of an entity. Result cannot contain related data.
No. Entity Framework doesn't have rich stored procedure support because its an ORM, not a SQL replacement.
As you have already discovered, if you need to use less common (more advanced?) features of stored procedures, you'll have to use good old fashioned ADO.NET.
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