I was trying to get status code of a stored procedure execution when encountered this error:
An exception of type 'System.Data.Entity.Core.EntityCommandExecutionException' occurred in EntityFramework.SqlServer.dll but was not handled in user code
Additional information: The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types.
I have rewritten the procedure to do absolutely nothing but to return an integer value, this is how it looks now:
ALTER Procedure [dbo].[test] ( @i int, @a nvarchar(max), @b nvarchar(max), @c nvarchar(max), @d nvarchar(max) ) As Begin SET NOCOUNT ON return 1 End
But I still get the same error at run-time when reaching the procedure call at line:
this.Database.SqlQuery<int>("test @i, @a, @b, @c, @d", p_i, p_a, p_b, p_c, p_d).FirstOrDefault();
Is there anyway to figure out what these fields are, and where they are coming from? And how should I get the returned value?
I've tried to specify a tuple of two strings as the
T just to look into these values, but with no success...
Select 1 instead of
return 1 makes the function usable, the only question remains what are these mysterious fields that are returned to the data reader?
Database.SqlQuery<T>() expects some kind of result set (e.g.
SELECT). Under the hood, it uses
DbCommand.ExecuteReader(), and when
T is scalar, it expects the result set to have exactly one field -- but if the result set has more than one field, or if there are no fields, it throws the exception that you encountered.
FYI, if you just want the return value, but you don't want a result set, use
ExecuteSqlCommand with a