Feature Layers

This GeoBlazor sample, written in Blazor for .NET developers, demonstrates several flavors of the FeatureLayer from the ArcGIS Maps SDK for JavaScript exposed through GeoBlazor's FeatureLayer Razor component. The page shows a 2D topographic basemap zoomed in over the Santa Monica Mountains. Above the map sits a panel of toggles: a Show Trailheads Points Layer checkbox (loads the Trailheads point FeatureLayer with default symbology), a radio group with three options for the Trails polyline layer (default rendering, a custom orchid SimpleLineSymbol whose width is sized by the ELEV_GAIN field through a SizeVariable, or a dotted pink line filtered to bike-friendly trails via DefinitionExpression), a Show Trailheads Polygons checkbox (loads the Parks and Open Space polygon FeatureLayer), and a Show Client-Side Graphics Layer checkbox that creates a FeatureLayer in pure C# from inline Graphics with Calcite-icon TextSymbols, custom Field definitions, and a PopupTemplate that displays a photo via {url}. The sample is intended to demonstrate hosted, styled, filtered, and client-side feature layers side-by-side in a Blazor application without writing JavaScript.