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ServiceFeatureTableManualCache.xaml.cs
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ServiceFeatureTableManualCache.xaml.cs
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// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.
using Esri.ArcGISRuntime;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using System;
namespace ArcGISRuntime.UWP.Samples.ServiceFeatureTableManualCache
{
[ArcGISRuntime.Samples.Shared.Attributes.Sample(
"Service feature table (manual cache)",
"Data",
"This sample demonstrates how to use a feature service in manual cache mode.",
"")]
public sealed partial class ServiceFeatureTableManualCache
{
private ServiceFeatureTable _incidentsFeatureTable;
public ServiceFeatureTableManualCache()
{
InitializeComponent();
// Create the UI, setup the control references and execute initialization
Initialize();
}
private void Initialize()
{
// Create new Map with basemap
Map myMap = new Map(Basemap.CreateTopographic());
// Create and set initial map location
MapPoint initialLocation = new MapPoint(
-13630484, 4545415, SpatialReferences.WebMercator);
myMap.InitialViewpoint = new Viewpoint(initialLocation, 500000);
// Create uri to the used feature service
Uri serviceUri = new Uri(
"http://sampleserver6.arcgisonline.com/arcgis/rest/services/SF311/FeatureServer/0");
// Create feature table for the incident feature service
_incidentsFeatureTable = new ServiceFeatureTable(serviceUri)
{
// Define the request mode
FeatureRequestMode = FeatureRequestMode.ManualCache
};
// When feature table is loaded, populate data
_incidentsFeatureTable.LoadStatusChanged += OnLoadedPopulateData;
// Create FeatureLayer that uses the created table
FeatureLayer incidentsFeatureLayer = new FeatureLayer(_incidentsFeatureTable);
// Add created layer to the map
myMap.OperationalLayers.Add(incidentsFeatureLayer);
// Assign the map to the MapView
MyMapView.Map = myMap;
}
private async void OnLoadedPopulateData(object sender, LoadStatusEventArgs e)
{
// If layer isn't loaded, do nothing
if (e.Status != LoadStatus.Loaded)
return;
// Create new query object that contains parameters to query specific request types
QueryParameters queryParameters = new QueryParameters()
{
WhereClause = "req_Type = 'Tree Maintenance or Damage'"
};
// Create list of the fields that are returned from the service
string[] outputFields = { "*" };
// Populate feature table with the data based on query
await _incidentsFeatureTable.PopulateFromServiceAsync(queryParameters, true, outputFields);
}
}
}