Required attribute on property with instance

Question

I something similar to the following

class EntityNameId
{
    public string Name { get; set; }
    public string Id { get; set; }
}

class OrganizationNameId : EntityNameId
{
}

class PersonViewModel
{
    public PersonViewModel()
    {
        Organization = new OrganizationNameId();
    }
    OrganizationNameId Organization { get; }
}

How can I set the Required attribute in PersonViewModel for OrganizationNameId.Id so that client-side validation will work? I don't want to put it in OrganizationNameId or EntityNameId because its not always required, but it is required for PersonViewModel. I am using MVC 3.

Edit: I do not want to add a custom property as described below by Bas. I have a custom partial view for EntityNameId that allows for it to be reusable.

check this this out , i already answered this question here http://stackoverflow.com/a/24757520/3050647 — elia07, Jul 15 '14 at 12:14

score 0 · Answer 1 · answered Mar 21 '11 at 18:40

0

One option is to add a property to PersonViewModel that binds to the organisation property:

[Required]
public int OrganizationId {
   get { return Organization.Id; }
   set { Organization.Id = value }
}

answered Mar 21 '11 at 18:40

Bas

26,772
8
53
86

I would prefer not to do this as I have a custom partial view that is named `EntityNameId`. – Daniel A. White Mar 21 '11 at 18:44

score 0 · Answer 2 · answered Mar 22 '11 at 16:21

public class EntityNameId
{
    public string Name { get; set; }
    public string Id { get; set; }
}

[MetadataType(typeof(OrganizationNameIdMetadataType))]
public class OrganizationNameId : EntityNameId
{
}

public class PersonViewModel
{
    public PersonViewModel()
    {
        Organization = new OrganizationNameId();
    }
    public OrganizationNameId Organization { get; private set; }
}

public class OrganizationNameIdMetadataType
{
    [Required]
    public object Id { get; set; }
}

Customizing ASP.NET MVC 2 - Metadata and Validation

How about use MetadataType attribute?

I don't want it to be required in all cases. – Daniel A. White Mar 22 '11 at 16:24 — Daniel A. White, Mar 22 '11 at 16:24

Required attribute on property with instance

2 Answers2