Create feature collection layer (Portal item)

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Create a feature collection layer from a portal item.

Image of create feature collection layer portal item

Use case

Feature collection layers are often used to hold features with mixed geometry or unstructured data. You can display feature collections stored in a Portal, which are often used for showing content from a CSV or map notes.

How to use the sample

The feature collection is loaded from the Portal item when the sample starts.

How it works

Create a Portal.
Create the PortalItem, referring to the portal and an item ID.
Verify that the item represents a feature collection.
Create a FeatureCollection from the item.
Create a FeatureCollectionLayer, referring to the feature collection.
Add the feature collection layer to the map's OperationalLayers collection.

Relevant API

FeatureCollection
FeatureCollectionLayer
Portal
PortalItem

About the data

The sample uses a sample layer depicting world populations.

Sample Code

FeatureCollectionLayerFromPortal.xaml

FeatureCollectionLayerFromPortal.xaml.cs

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﻿<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="ArcGISRuntime.Samples.FeatureCollectionLayerFromPortal.FeatureCollectionLayerFromPortal"
             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 />
            <RowDefinition Height="40" />
            <RowDefinition Height="40" />
        </Grid.RowDefinitions>
        <esriUI:MapView x:Name="MyMapView" Grid.Row="0" />
        <Entry x:Name="CollectionItemIdTextBox"
               Grid.Row="1"
               HorizontalOptions="Fill"
               Placeholder="Portal item Id" />
        <Button Grid.Row="2"
                Clicked="OpenPortalFeatureCollectionClick"
                HorizontalOptions="Fill"
                Text="Open feature collection item" />
    </Grid>
</ContentPage>