Property attributes

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using EPiServer.Core;
using EPiServer.DataAnnotations;
using System.ComponentModel.DataAnnotations;
using EPiServer.Security;
using EPiServer;
using EPiServer.Web;
using EPiServer.Shell.ObjectEditing.EditorDescriptors;
using EPiServer.Shell.ObjectEditing;
using EPiServer.DataAbstraction;

namespace CodeSamples {
  [ContentType(
    DisplayName = "My Page Type",
    Description = "Description for this page type",
    Order = 1024,
    GUID = "9CBBF910-CB5A-4C72-83AA-EDCF02E8A2BD",
    GroupName = "My Group",
    AvailableInEditMode = true)]
  [AvailableContentTypes(Include = new Type[] {
    typeof (MyPageType2), typeof (MyPageType3)
  })]
  [Access(Users = "niis", Roles = "CmsEditors")]
  public class TypedPageWithAttributeSample: PageData {
    [Required]
    [Searchable]
    [CultureSpecific]
    [Editable(true)]
    [Display(
      Name = "My Heading",
      Description = "Heading for my page type.",
      GroupName = "My Tab",
      Order = 64)]
    public virtual string Heading {
      get;
      set;
    }

    //An integer between 0 and 130.
    [Range(0, 130)]
    public virtual int Age {
      get;
      set;
    }

    //Validating against a given regular expression.
    [RegularExpression("[SomeRegularExpression]")]
    public virtual string CustomValidation {
      get;
      set;
    }

    //A string with a maximum length of 20 characters.
    [StringLength(20)]
    public virtual string Header {
      get;
      set;
    }

    //Any URL
    public virtual Url RedirectPage {
      get;
      set;
    }

    //Reference to an image in the EPiServer media system.
    [UIHint(UIHint.Image)]
    public virtual ContentReference Logotype {
      get;
      set;
    }

    //URL to image is also supported but mostly for upgrade support or when there is a need to add custom query parameters to the URL.
    [UIHint(UIHint.Image)]
    public virtual Url LogotypeAsUrl {
      get;
      set;
    }

    //Creates a selection of predefined values.
    [SelectOne(SelectionFactoryType = typeof (CustomLanguageSelectionFactory))]
    public virtual string LanguageSelection {
      get;
      set;
    }

    //Creates a selection of predefined values with the option to select several items.
    [SelectMany(SelectionFactoryType = typeof (CustomLanguageSelectionFactory))]
    public virtual string MultipleLanguageSelection {
      get;
      set;
    }
  }

  public class CustomLanguageSelectionFactory: ISelectionFactory {
    public IEnumerable < ISelectItem > GetSelections(ExtendedMetadata metadata) {
      var languages = new List < SelectItem > ();

      languages.Add(new SelectItem() {
        Text = "English", Value = "en"
      });
      languages.Add(new SelectItem() {
        Text = "Swedish", Value = "sv"
      });
      languages.Add(new SelectItem() {
        Text = "Norwegian", Value = "no"
      });

      return languages;
    }
  }

  [AvailableContentTypes(IncludeOn = new Type[] {
    typeof (TypedPageWithAttributeSample)
  })]
  [ContentType]
  public class MyPageType1: PageData {}

  [AvailableContentTypes(Exclude = new Type[] {
    typeof (TypedPageWithAttributeSample)
  })]
  [ContentType]
  public class MyPageType2: PageData {}

  [AvailableContentTypes(ExcludeOn = new Type[] {
    typeof (MyPageType1)
  })]
  [ContentType]
  public class MyPageType3: PageData {}

  [AvailableContentTypes(Availability = Availability.None)]
  [ContentType]
  public class MyPageType4: PageData {}
}