XAF - How to show the number of List View items in the Navigation Control

This example displays the number of List View items in the Navigation Control. When a user adds or deletes List View items, navigation item captions update the record count automatically.

ASP.NET Core Blazor

Implementation Details

Follow the steps below to customize navigation item captions:

1. Create a Window Controller (NavigationObjectCountController.cs).
   • In the FrameAssigned event handler, subscribe to the NavigationItemCreated event.
   • Use the NavigationItem.Caption event argument property to specify the custom caption (add the number of items).
2. Create a View Controller (RefreshNavigationController.cs).
   • In the Activated event handler, subscribe to the IObjectSpace.Committed event.
   • Call the RecreateNavigationItems method to recreate navigation items whenever underlying data changes.

Files to Review

• NavigationObjectCountController.cs
• RefreshNavigationController.cs

Documentation

• Access Controller's Events and Properties

More Examples

• XAF - How to show the number of nested List View items in tab captions

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