How can I add my attributes to Code-Generated Linq2Sql classes properties?

c# linq-to-sql attributes code-generation
ArielBH picture ArielBH · Dec 26, 2008 · Viewed 7.4k times · Source

I would like to add attributes to Linq 2 Sql classes properties. Such as this Column is browsable in the UI or ReadOnly in the UI and so far.

I've thought about using templates, anybody knows how to use it? or something different?

Generally speaking, would do you do to address this issue with classes being code-generated?

Answer

Jason Wicker picture Jason Wicker · Mar 20, 2009

You can take advantage of the new Metadata functionality in the System.ComponentModel.DataAnnotations which will allow us to separate the MetaData from the existing domain model.

For example:

[MetadataType (typeof (BookingMetadata))]
public partial class Booking
{
 // This is your custom partial class     
}

public class BookingMetadata
{
 [Required] [StringLength(15)]
 public object ClientName { get; set; }

 [Range(1, 20)]
 public object NumberOfGuests { get; set; }

 [Required] [DataType(DataType.Date)]
 public object ArrivalDate { get; set; }
}

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