ASP.NET Core and EF Core 1.1 - Diplay Data using Stored Procedure

While support for stored procedures isn’t completely there with Entity Framework Core yet, you still can use FromSql to consume stored procedures with it.

In order to do that, the database context needs to know the entity you are mapping to from the stored procedure. Unfortunately, the only way to do that right now is to actually define it as an entity in the database context:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    modelBuilder.Entity<StoredProcRow>(entity =>
    {
        // …
    });
}

Then, you can consume the stored procedure by running the FromSql method on a set for that entity:

public virtual IQueryable<StoredProcRow> GetLoanDetails()
{
    return Set<StoredProcRow>().FromSql("[sp_GetLoanDetails]").AsNoTracking();
}

Note that I’m using a AsNoTracking here to avoid the data context to track changes to entities that come from the stored procedure (since you don’t have a way to update them anyway). Also I’m using Set<T>() inside the method to avoid having to expose the type as a member on the database context since you cannot use the set without the stored procedure anyway.

Btw. you don’t need (not sure if that even works) EXEC in the sql statement you pass to FromSql. Just pass the stored procedure name and any arguments to it, e.g.:

Set<MyEntity>().FromSql("[SomeStoredProcedure]");
Set<MyEntity>().FromSql("[SProcWithOneArgument] @Arg = {0}");
Set<MyEntity>().FromSql("[SProcWithTwoArguments] @Arg1 = {0}, Arg2 = {1}");