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 length of 256, or nvarchar(max), or...
So if this is for example my model
public class Book{
public string Title { get; set; } //should be 256 chars
public string Description {get;set} //should be nvarchar(max)
}
how could it be defined?
Thanks in advance!
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<Book>()
.Property(p => p.Title)
.HasMaxLength(256);
As is stated in my comment, it's simple.
Just use [StringLength(1000)]
or [MaxLength]
from DataAnnotation
.
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