In 7.5, all media items are content items, in the same way as Pages or Blocks.

Therefore, you can locate specific media using an IContentRepository in the same way as Pages or Blocks, using the GlobalAssetsRoot as a starting content reference.

BlobFactory is for getting or creating the actual blob data associated with the media content item. I'm not sure why you specifically want to use BlobFactory, as this would not help in this instance.

Thanks Simon for your response. You helped me a lot already.

For looping through the media assets I now use:

var assets = contentRepository.GetChildren<MediaData>(SiteDefinition.Current.GlobalAssetsRoot);

foreach (var item in assets)
{
      // Do something
}

But this wont loop through the subfolders in the GlobalAssetsRoot. How do I accomplish that?

For example in the Alloy Sample Page you have subfolders in the media panel like

• Alloy Meet
• Alloy Plan
• Alloy Track
• etc

With the above code I only loop through the media that is located in the root itself.

If you are interested in the subfolders sitting under the root folder, you can get to them like this:

var rootFolders = ContentRepository.GetChildren<ContentFolder>(SiteDefinition.Current.GlobalAssetsRoot);

            foreach (var rootFolder in rootFolders)
            {
                // Do something
            }

Is starting with the GlobalAssetsRoot and looping through folders the most efficient way to find a folder several levels deep?

Normally you don't search for them no. You create a new property (ContentReference) on the page/block that uses the image and let editor set that. Then you use that to find your media instead of searching through media files for a file with a specific name. For layout images I normally store content references on startpage.

You can of course loop through them all as well but it's rare that you really need to. Then you can use UrlResolver.GetUrl to get the url to the file of you need it.