How to use DbContext.Database.SqlQuery(s

Question

I have a stored procedure that has three parameters and I've been trying to use the following to return the results:

context.Database.SqlQuery<myEntityType>("mySpName", param1, param2, param3);

At first I tried using SqlParameter objects as the params but this didn't work and threw a SqlException with the following message:

Procedure or function 'mySpName' expects parameter '@param1', which was not supplied.

So my question is how you can use this method with a stored procedure that expects parameters?

Thanks.

Answer 1

return context.Database.SqlQuery<myEntityType>("mySpName {0}, {1}, {2}",
new object[] { param1, param2, param3 });

//Or

using(var context = new MyDataContext())
{
return context.Database.SqlQuery<myEntityType>("mySpName {0}, {1}, {2}",
new object[] { param1, param2, param3 }).ToList();
}

//Or

using(var context = new MyDataContext())
{
object[] parameters =  { param1, param2, param3 };

return context.Database.SqlQuery<myEntityType>("mySpName {0}, {1}, {2}",
parameters).ToList();
}

//Or

using(var context = new MyDataContext())
{  
return context.Database.SqlQuery<myEntityType>("mySpName {0}, {1}, {2}",
param1, param2, param3).ToList();
}

Answer 2

This solution is (only) for SQL Server 2005

You guys are lifesavers, but as @Dan Mork said, you need to add EXEC to the mix. What was tripping me up was:

• 'EXEC ' before the Proc Name
• Commas in between Params
• Chopping off '@' on the Param Definitions (not sure that bit is required though).

:

context.Database.SqlQuery<EntityType>(
    "EXEC ProcName @param1, @param2", 
    new SqlParameter("param1", param1), 
    new SqlParameter("param2", param2)
);

Answer 3

You should supply the SqlParameter instances in the following way:

context.Database.SqlQuery<myEntityType>(
    "mySpName @param1, @param2, @param3",
    new SqlParameter("param1", param1),
    new SqlParameter("param2", param2),
    new SqlParameter("param3", param3)
);