Table of Contents

Read / Access Metadata - (advanced ⚠)

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There are two ways to read / access Metadata

  1. On most 2sxc Data-objects there is a property called Metadata which contains everything you need
  2. To get Metadata for other Data there is a simple API to retrieve it

Get Metadata on 2sxc Data Objects #todoc

Many standard 2sxc object have a property Metadata to quickly access all Metadata of that object. You can find the docs in IMetadataOf. This applies to all kinds of objects like

  1. Entities
  2. Content-Types
  3. Apps
  4. ADAM files and folders

Get Metadata for ADAM Files and Folders #todoc

All ADAM Assets also have the .Metadata property to read the metadata as well as a .HasMetadata to quickly see if Metadata has been set.

Edge cases of the .Metadata Property

Since .Metadata is often used in dynamic code it's optimized to just work. This means it has the following effects

  1. It will always return a valid object, even if there is no metadata attached
  2. If no metadata exists, the EntityId will always equal zero 0
  3. If it has one or more metadata items attached, the EntityId will be that of the first Metadata-Entities found

#todoc - this should probably be moved to the C# API infos

Get Metadata for Data outside of 2sxc #todoc

To read Metadata for non-2sxc objects you must request it from the App.Data.Metadata or from the AppState.MetadataSource object. Both are a a IMetadataSource. Use commands like GetMetadata<T>(...) to access the metadata you need.

Read also #todoc

History

  1. Introduced in 2sxc v2
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