ArcGIS Pro 2.7 API Reference Guide
LoadingMessage Property (Gallery)

ArcGIS.Desktop.Framework.Contracts Namespace > Gallery Class : LoadingMessage Property
Gets or sets the message to show while items are loading into collection.
Syntax
public string LoadingMessage {get;}
Public ReadOnly Property LoadingMessage As String
Remarks

To better support a responsive UI experience, the framework provides a waiting spinner and loading message on the gallery’s dropdown when it is trying to asynchronously load a large number of items. The loading message can be updated at runtime or set statically using the loadingMessage attribute. Note, to get this default behavior, no heavy code should be put in the gallery’s constructor since it will block the UI thread and prevent the spinner from showing up. The loading message only appears in drop down galleries (not in-inline).

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

Gallery Class
Gallery Members