Entity Framework 4.1 code first approach: how to define length of properties

Question

As the title implies:

how is it possible to tell Entity Framework 4.1 in code first approach, that i do want some properties (in particular of type string) to have a le

Answer 1

In EF4.1 RTW default length is nvarchar(max) for SQL Server and nvarchar(4000) for SQL CE. To change the length use either StringLength or MaxLength annotations or fluent mapping HasMaxLength:

[StringLength(256)]
public string Title { get; set; }

Or

[MaxLength(256)]
public string Title { get; set; }

Or

modelBuilder.Entity()
            .Property(p => p.Title)
            .HasMaxLength(256);