What is ScaffoldColumn and RegularExpression attributes - regex

Question

I am trying to learn MVC4 and i've come to this chapter called validation.
I came to know about DataAnnotations and they have pretty neat attributes to do some server side validation. In book they have only explained about [Required] and [Datatype] attribute. However in asp.net website i saw something called ScaffoldColumn and RegularExpression.
Can someone explain what they are, even though I know little what RegularExpression does.
Also are there any other important validation attributes I should know?

Answer 1

Scaffold Column dictates if when adding a view based on that datamodel it should/not scaffold the column. So forexample your model's id field is a good candidate for you to specify ScaffoldColumn(false), and other foreign key fields etc.
I you specify a regular expression, then if you scaffold a new view for that model,edit customer for example, a regex or regular expression on field will enforce that entered data must match that format.

Answer 2

You can read about ScaffoldColumnAttribute Class here
[MetadataType(typeof(ProductMetadata))]
public partial class Product
{
}
public class ProductMetadata
{
[ScaffoldColumn(true)]
public object ProductID;
[ScaffoldColumn(false)]
public object ThumbnailPhotoFileName;
}
And about RegularExpressionAttribute Class you can read here.
using System;
using System.Web.DynamicData;
using System.ComponentModel.DataAnnotations;
[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
}
public class CustomerMetaData
{
// Allow up to 40 uppercase and lowercase
// characters. Use custom error.
[RegularExpression(#"^[a-zA-Z''-'\s]{1,40}$",
ErrorMessage = "Characters are not allowed.")]
public object FirstName;
// Allow up to 40 uppercase and lowercase
// characters. Use standard error.
[RegularExpression(#"^[a-zA-Z''-'\s]{1,40}$")]
public object LastName;
}