Unique Key constraints for multiple columns in Entity Framework

by

I’m using Entity Framework 5.0 Code First;

public class Entity
 {
   [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
   public string EntityId { get; set;}
   public int FirstColumn  { get; set;}
   public int SecondColumn  { get; set;}
 }

I want to make the combination between FirstColumn and SecondColumn as unique.

Example:

Id  FirstColumn  SecondColumn 
1       1              1       = OK
2       2              1       = OK
3       3              3       = OK
5       3              1       = THIS OK 
4       3              3       = GRRRRR! HERE ERROR

Is there anyway to do that?

12 Answers
12

Leave a Comment