asp.net mvc - MVC3 Validation - Require One From Group

Question

Given the following viewmodel:

public class SomeViewModel
{
  public bool IsA { get; set; }
  public bool IsB { get; set; }
  public bool IsC { get; set; } 
  //... other properties
}

I wish to create a custom attribute that validates at least one of the available properties are true. I envision being able to attach an attribute to a property and assign a group name like so:

public class SomeViewModel
{
  [RequireAtLeastOneOfGroup("Group1")]
  public bool IsA { get; set; }

  [RequireAtLeastOneOfGroup("Group1")]
  public bool IsB { get; set; }

  [RequireAtLeastOneOfGroup("Group1")]
  public bool IsC { get; set; } 

  //... other properties

  [RequireAtLeastOneOfGroup("Group2")]
  public bool IsY { get; set; }

  [RequireAtLeastOneOfGroup("Group2")]
  public bool IsZ { get; set; }
}

I would like to validate on the client-side prior to form submission as values in the form change which is why I prefer to avoid a class-level attribute if possible.

This would require both the server-side and client-side validation to locate all properties having identical group name values passed in as the parameter for the custom attribute. Is this possible? Any guidance is much appreciated.

question from:https://stackoverflow.com/questions/7247748/mvc3-validation-require-one-from-group