Content Type Attributes Reference

Content type attributes

[ContentType]

Registers a class as a CMS content type. Required on all page, block, and media types.

Parameter	Type	Required	Description
DisplayName	string	Yes	Name shown in the editor UI
GUID	string	Yes	Unique identifier. Never change after deployment.
Description	string	No	Help text shown when selecting the type
GroupName	string	No	Groups types in the “New page” dialog
Order	int	No	Sort order within the group
AvailableInEditMode	bool	No	Whether authors can create instances (default: true)

[ContentType(
    DisplayName = "Article Page",
    GUID = "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    Description = "A page for publishing articles",
    GroupName = "Content",
    Order = 100)]
public class ArticlePage : PageData { }

[AvailableContentTypes]

Restricts which content types can be created as children or placed in content areas.

Parameter	Type	Description
Include	Type[]	Only these types are allowed
Exclude	Type[]	These types are blocked (all others allowed)
IncludeOn	Type[]	This type can only be created under these parent types
ExcludeOn	Type[]	This type cannot be created under these parent types

[AvailableContentTypes(Include = new[] { typeof(ArticlePage), typeof(CategoryPage) })]
public class BlogContainer : PageData { }

[ImageUrl]

Sets the thumbnail icon shown in the content type selector.

[ImageUrl("~/icons/article-icon.png")]
public class ArticlePage : PageData { }

Property attributes

[Display]

Controls how a property appears in the editor form.

Parameter	Type	Description
Name	string	Label shown in the editor
Description	string	Help text below the field
GroupName	string	Tab where the property appears
Order	int	Sort order within the tab
Prompt	string	Placeholder text in the input

[Required]

Makes the property mandatory. Content cannot be published without a value.

[Searchable]

Controls whether the property value is included in full-text search.

[Searchable(false)]  // Exclude from search index
public virtual string InternalNotes { get; set; }

[CultureSpecific]

When true, the property has a separate value per language. When false, the value is shared across all languages.

[CultureSpecific]  // Each language has its own value
public virtual string Title { get; set; }

[CultureSpecific(false)]  // Same value in all languages
public virtual string ProductSKU { get; set; }

[ScaffoldColumn]

Hides the property from the editing form while keeping it accessible in code.

[ScaffoldColumn(false)]
public virtual string InternalId { get; set; }

[Ignore]

Excludes the property from CMS entirely — not stored, not editable.

[Ignore]
public virtual string ComputedField => $"{FirstName} {LastName}";

Editor hint attributes

[UIHint]

Overrides the default editor control for a property.

UIHint value	Editor control
UIHint.Textarea	Multi-line text area
UIHint.MediaFile	Media file picker
UIHint.Image	Image picker
UIHint.Video	Video picker
UIHint.Block	Block picker

[UIHint(UIHint.Textarea)]
public virtual string Summary { get; set; }

[UIHint(UIHint.Image)]
public virtual ContentReference HeroImage { get; set; }

[SelectOne] / [SelectMany]

Creates dropdown or checkbox list from a selection factory.

[SelectOne(SelectionFactoryType = typeof(ColorFactory))]
public virtual string Theme { get; set; }

[SelectMany(SelectionFactoryType = typeof(TagFactory))]
public virtual string Tags { get; set; }

Validation attributes

Attribute	Effect
[Required]	Field must have a value
[StringLength(max)]	Maximum string length
[StringLength(max, MinimumLength = min)]	Min and max length
[Range(min, max)]	Numeric range
[RegularExpression(pattern)]	Regex validation
[AllowedTypes(typeof(ImageData))]	Restricts content reference to specific types

Related

• Create a Content Type — Step-by-step guide
• Define Properties — Property configuration guide
• Content Modeling — Design principles