List features related to the selected feature.
Use case
Related features are useful for managing relational information, like what you would store in a relational database management system (RDBMS). You can define relationship between records as one-to-one, one-to-many, or many-to-one. For example, you could model inspections and facilities as a many-to-one relationship. Then, for any facility feature, you could list related inspection features.
How to use the sample
Tap on a feature to select it. The related features will be displayed in a list.
How it works
- With a
Feature, callQueryRelatedFeaturesAsyncon the feature's feature table. - Iterate over the result's collection of
RelatedFeatureQueryResultobjects to get the related features and add them to a list.
Relevant API
- ArcGISFeature
- ArcGISFeatureTable
- FeatureQueryResult
- FeatureTable.QueryRelatedFeatures
- RelatedFeatureQueryResult
Tags
features, identify, query, related, relationship, search
Sample Code
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="ArcGISRuntime.Samples.ListRelatedFeatures.ListRelatedFeatures"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="150" />
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<ListView x:Name="MyResultsView" Grid.Row="0" />
<Label x:Name="Status"
Grid.Row="1"
Margin="5"
HorizontalOptions="FillAndExpand"
Text="Tap a park (green) to see related features." />
<esriUI:MapView x:Name="MyMapView" Grid.Row="2" />
</Grid>
</ContentPage>