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Media support

Introduces concepts about setting up media support in Optimizely Content Management System (CMS).

Examples in this topic are based on an empty Optimizely Content Management System (CMS) project, as described in Create a starter project.

Optimizely has built-in features that support working with media such as documents, images, and video. Built-in features include multiple file uploads and drag-and-drop of media into the ContentArea, ContentReference, and XhtmlString properties. To use these features, you must first define media types in your content model, just as for other content types.

Like a page type, a media type defines a set of properties. Media like an image is an instance of the .NET class defining the media type upon which the media is based, and implementing the IContent interface. Media is routed like pages but has a built-in template that returns the image or document.

Add media types

You should create specific classes for media of type images, video, and anything generic other than video or image, such as text or PDF files.

The following code sample is a simple media type for images. Inheriting from ImageData adds built-in functionality like thumbnail display in lists and editing previews. See Media types and templates.

namespace MyEpiSite.Models.Media {
  [ContentType(DisplayName = "ImagesMedia", GUID = "a4afb648-f7c0-4207-8ac0-f0c532de99ca",
    Description = "Used for generic image types")]
  [MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,ico,gif,bmp,png")]
  public class ImagesMedia: ImageData {}

Media structure

Media used in site content must be available in folders in the Assets panel. The folder structure is shared with blocks, so when you create a folder for images, the same folder will also be created for blocks. You can set access rights for folders to restrict editor access. See Folders in the Optimizely User Guide.

The assets folder structure is intended to be used as follows:

  • For All Sites – Assets are available for sharing across a website or websites in a multi-site scenario.
  • For This Site – Assets available within a site in a multi-site scenario, see Initial configuration.
  • For This Page – Assets are only available for a specific page (or block).

See Media types and templates.

Upload media

Media can be uploaded as follows:

  • Drag-and-drop into the Assets pane, or through the Upload Files option in the context menu (see Optimizely user interface.
  • Programmatically by using the CMS API.
  • Through a custom provider.

In a standard installation, media are automatically published and indexed when uploaded, (unless you have a content approval workflow in place). You can change this through the UIOptions.AutoPublishMediaOnUpload setting.

Image Editor

Optimizely has a built-in image editor providing basic image editing capabilities like resizing and cropping. See Add, edit, and delete images in the Optimizely User Guide.

To help editors apply the correct image size for content, you can configure preset values that editors can select in the image editor. The configuration is assigned to the ImageEditorOptions.SizePresets setting. The configuration example below configures preset with two values (320, 240) and (640, 480).

"EPiServer": {
  "CmsUI": {
    "ImageEditor": {
      "SizePresets": [{
          "Name": "320*240",
          "Width": 320,
          "Height": 240
          "Name": "640*480",
          "Width": 640,
          "Height": 480

The result when editing an image in the Image Editor.

Image editor results

See Configuration.

Add an image link property

Link properties are commonly used to let editors select an image from an assets folder, and link it to the page for display on the front-end. The following example shows how to add an image link property with rendering to a page.

Using ContentReference you can link to an image. Adding the UIHint.Image attribute lets you specifically select content types that implement IContentImage, so only images are available for selection in the folder structure. Omitting UIHint.Image will display types of content in the folder structure.

namespace MyEpiSite.Models.Pages {
    DisplayName = "TestPage",
    GUID = "61f028c8-be3d-4942-b58c-65ea8b28e7b6",
    Description = "Description for this page type")]
  public class TestPage: PageData {
      Name = "Page image",
      Description = "Link to image that will be displayed on the page.",
      GroupName = SystemTabNames.Content,
      Order = 1)]
    public virtual ContentReference Image {

This code adds a "Page image" property, linking an image to the page through drag-and-drop or selecting from the asset folder structure.

Add a controller for the rendering of the test page.

namespace MyEpiSite.Controllers {
  public class TestPageController: PageController<TestPage> {
    public ActionResult Index(TestPage currentPage) {
      /* Implementation of action. 
       * You can create your own view model class that you pass to the view
       * or you can pass the page type for simpler templates */

      return View(currentPage);

Add a view to complete rendering the linked image on the test page.

@using EPiServer.Core
    @using EPiServer.Web.Mvc.Html
    @model MyEpiSite.Models.Pages.TestPage
      <img src="@Url.ContentUrl(Model.Image)"/>

The image is rendered in on-page edit and preview views and on the front-end.

The image is rendered in on-page edit and preview views and on the front-end

See Assets and media.