Microsoft.EntityFrameworkCore 中 ExecuteScalar 的对应项

Question

My stored procedure has SELECT SCOPE_IDENTITY() after the insert is done. Using ADO.net provides ExecuteScalar to retrieve the same while calling the stored proc.

Is a similar feature available in Microsoft.EntityFrameworkCore(Version=3.1.5.0) which could return SCOPE_IDENTITY after sp is executed. I see it has ExecuteSqlRaw but it just returns the rows affected.

Answer 1

You can do this:

using (var db = new NorthwindContext())
{
    var result = db.Set<IntReturn>()
    .FromSqlRaw("exec dbo.Scalar")
    .AsEnumerable()
    .First().Value;
    
    Console.WriteLine(result);
}

See my blog post here for more details: https://erikej.github.io/efcore/2020/05/26/ef-core-fromsql-scalar.html