Folder Description

The "api/MediaFiles/" endpoints are intended to download BLOB data stored in databases (aka File Attachments). 
You can download data from FileData, MediaDataObject, Image or byte array properties declared in your data models. 
These additional benefits of our Web API Service ship as part of the DevExpress Universal Subscription (https://www.devexpress.com/buy/net/).

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Relevant Documentation

Obtain BLOB Data from a Web API Controller Endpoint
https://docs.devexpress.com/eXpressAppFramework/404207/

File Attachments Module
https://docs.devexpress.com/eXpressAppFramework/112781/