Add data annotations to a class generated by entity framework

by

The generated class ItemRequest will always be a partial class. This allows you to write a second partial class which is marked with the necessary data annotations. In your case the partial class ItemRequest would look like this:

using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

//make sure the namespace is equal to the other partial class ItemRequest
namespace MvcApplication1.Models 
{
    [MetadataType(typeof(ItemRequestMetaData))]
    public partial class ItemRequest
    {
    }

    public class ItemRequestMetaData
    {
        [Required]
        public int RequestId {get;set;}

        //...
    }
}

More Related Contents:

  1. Circular reference detected exception while serializing object to JSON
  2. No connection string named ‘MyEntities’ could be found in the application config file
  3. When should I create a new DbContext()
  4. Enable Migrations with Context in Separate Assembly?
  5. How to create custom additional fields in UserProfile in MVC4
  6. Entity Framework change connection at runtime
  7. Writing Recursive CTE using Entity Framework Fluent syntax or Inline syntax
  8. The type of one of the expressions in the join clause is incorrect in Entity Framework
  9. Can I reuse code for selecting a custom DTO object for a child property with EF Core?
  10. Linq to EntityFramework DateTime
  11. LINQ to SQL multiple tables left outer join
  12. How to Bulk Update records in Entity Framework?
  13. Using DataAnnotations with Entity Framework
  14. Entity Framework – retrieve ID before ‘SaveChanges’ inside a transaction
  15. ASP.NET Controller: An asynchronous module or handler completed while an asynchronous operation was still pending
  16. Entity Framework with XML Files [closed]
  17. Mapping Database Views to EF 5.0 Code First w/Migrations
  18. DbSet.Attach(entity) vs DbContext.Entry(entity).State = EntityState.Modified
  19. JsonValueProviderFactory throws “request too large”
  20. The operation cannot be completed because the DbContext has been disposed error
  21. Database.BeginTransaction vs Transactions.TransactionScope [duplicate]
  22. Autonumber with Entity Framework
  23. How to manually validate a model with attributes?
  24. Return Json, but it includes backward slashes “\”, which I don’t want
  25. Unable to find the requested .Net Framework Data Provider. It may not be installed
  26. Entity framework: StoreGeneratedPattern=”Computed” property
  27. The entity type ‘IdentityUserLogin’ requires a primary key to be defined [duplicate]
  28. How to route EVERYTHING other than Web API to /index.html
  29. Use both AddDbContextFactory() and AddDbContext() extension methods in the same project
  30. How to use String property as primary key in Entity Framework

Leave a Comment