A given content type has a few different unique identifier that we can use to look it up via the content type service. For instance, if we know the GUID of the content type, we can look it up like this:
// Declare the GUID IDGuid guid =newGuid("796a8d5c-b7bb-46d9-bc57-ab834d0d1248");// Get a reference to the content type by its GUID IDIContentType contentType =_contentTypeService.Get(guid);
Although the use of a GUID is preferable, you can also use it's numeric ID:
// Get a reference to the content type by its numeric IDIContentType contentType =_contentTypeService.Get(1234);
Finally, you can also look up a content type by its alias:
// Get a reference to the content type by its aliasIContentType contentType =_contentTypeService.Get("home");
Getting a list of content types
As content types are stored in a hierarchical list with folders (containers), there is also multiple ways to can get content types. If you are looking for a flat list of all content types, you can use the GetAll method:
// Get a collection of all content typesIEnumerable<IContentType> contentTypes =_contentTypeService.GetAll();
In the example above, the method was called without any parameters. The method also has two overloads, which lets you look up a collection fo content types by either specifying their GUID or numeric IDs:
// Get a collection of two specific content types by their GUIDs IDsIEnumerable<IContentType> contentTypes =_contentTypeService.GetAll(new[] {newGuid("2b54088e-d355-4b9e-aa4b-5aec4b3f87eb"),newGuid("859c5916-19d8-4a72-9bd0-5641ad503aa9")});
// Get a collection of two specific content types by their numeric IDsIEnumerable<IContentType> contentTypes =_contentTypeService.GetAll(1234,1235);
To get a list of all content types of another content type, you can instead use the GetChildren method - either by specifying the numeric ID or the GUID:
// Get a collection of content types of a specific content typeIEnumerable<IContentType> contentTypes =_contentTypeService.GetChildren(1232);
In some cases it can be useful to check if a content type has children. The HasChildren method can be used to check whether a content type has children.
// Check if there are childrenbool hasChildren =_contentTypeService.HasChildren(Guid.Parse("2b54088e-d355-4b9e-aa4b-5aec4b3f87eb"));
Although the use of a GUID is preferable, you can also use it's numeric ID:
// Check if there are childrenbool hasChildren =_contentTypeService.HasChildren(1234);