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ArcGISWebException Class

ArcGISWebException thrown by ArcGISHttpClientHandler when an ArcGIS Server returns an error.
Inheritance Hierarchy

Namespace:  Esri.ArcGISRuntime.Http
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version:
public sealed class ArcGISWebException : Exception

The ArcGISWebException type exposes the following members.

Public propertyCode
Gets the error code.
Public propertyDetails
Gets the error details.
Public propertyMessage
Gets a message that describes the current exception.
(Overrides ExceptionMessage.)
Public propertyResponse
Gets the response that the remote host returned.


Example Name: ClosestFacilityStatic

Demonstrates how to solve a Closest Facility Task to find the closest route between facilities and incidents.

Code example screen shot.

// Copyright 2018 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:
// 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.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.Tasks.NetworkAnalysis;
using Esri.ArcGISRuntime.UI;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;

namespace ArcGISRuntime.WPF.Samples.ClosestFacilityStatic
        "Closest facility (static)",
        "Network Analysis",
        "Demonstrates how to solve a Closest Facility Task to find the closest route between facilities and incidents.",
        "Click the solve button to find the closest facility to every incident.")]
    public partial class ClosestFacilityStatic
        // Used to display route between incident and facility to mapview.
        private List<SimpleLineSymbol> _routeSymbols;

        // Solves task to find closest route between an incident and a facility.
        private ClosestFacilityTask _task;

        // Table of all facilities.
        private ServiceFeatureTable _facilityTable;

        // Table of all incidents.
        private ServiceFeatureTable _incidentTable;

        // Feature layer for facilities.
        private FeatureLayer _facilityLayer;

        // Feature layer for incidents.
        private FeatureLayer _incidentLayer;

        // Uri for facilities feature service.
        private Uri _facilityUri = new Uri("");

        // Uri for incident feature service.
        private Uri _incidentUri = new Uri("");

        // Uri for the closest facility service.
        private Uri _closestFacilityUri = new Uri("");

        public ClosestFacilityStatic()

            // Create the map and graphics overlays.

        private async void Initialize()
                // Construct the map and set the MapView.Map property.
                MyMapView.Map = new Map(Basemap.CreateLightGrayCanvasVector());

                // Add a graphics overlay to MyMapView. (Will be used later to display routes)
                MyMapView.GraphicsOverlays.Add(new GraphicsOverlay());

                // Create a ClosestFacilityTask using the San Diego Uri.
                _task = await ClosestFacilityTask.CreateAsync(_closestFacilityUri);

                // Create a symbol for displaying facilities.
                PictureMarkerSymbol facilitySymbol = new PictureMarkerSymbol(new Uri(""))
                    Height = 30,
                    Width = 30

                // Incident symbol.
                PictureMarkerSymbol incidentSymbol = new PictureMarkerSymbol(new Uri(""))
                    Height = 30,
                    Width = 30

                // Create a list of line symbols to show unique routes. Different colors help make different routes visually distinguishable.
                _routeSymbols = new List<SimpleLineSymbol>()
                    new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(125, 25, 45, 85), 5.0f),
                    new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(125, 35, 65, 120), 5.0f),
                    new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(125, 55, 100, 190), 5.0f),
                    new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(125, 75, 140, 255), 5.0f)

                // Create a table for facilities using the FeatureServer.
                _facilityTable = new ServiceFeatureTable(_facilityUri);

                // Create a feature layer from the table.
                _facilityLayer = new FeatureLayer(_facilityTable)
                    Renderer = new SimpleRenderer(facilitySymbol)

                // Create a table for facilities using the FeatureServer.
                _incidentTable = new ServiceFeatureTable(_incidentUri);

                // Create a feature layer from the table.
                _incidentLayer = new FeatureLayer(_incidentTable)
                    Renderer = new SimpleRenderer(incidentSymbol)

                // Add the layers to the map.

                // Wait for both layers to load.
                await _facilityLayer.LoadAsync();
                await _incidentLayer.LoadAsync();

                // Zoom to the combined extent of both layers.
                Envelope fullExtent = GeometryEngine.CombineExtents(_facilityLayer.FullExtent, _incidentLayer.FullExtent);
                await MyMapView.SetViewpointGeometryAsync(fullExtent, 50);

                // Enable the solve button.
                SolveRoutesButton.IsEnabled = true;
            catch (Exception exception)
                System.Windows.MessageBox.Show("An exception has occurred.\n" + exception.Message, "Sample error");

        private async void SolveRoutesClick(object sender, EventArgs e)
            // Holds locations of hospitals around San Diego.
            List<Facility> facilities = new List<Facility>();

            // Holds locations of hospitals around San Diego.
            List<Incident> incidents = new List<Incident>();

            // Create query parameters to select all features.
            QueryParameters queryParams = new QueryParameters()
                WhereClause = "1=1"

            // Query all features in the facility table.
            FeatureQueryResult facilityResult = await _facilityTable.QueryFeaturesAsync(queryParams);

            // Add all of the query results to facilities as new Facility objects.
            facilities.AddRange(facilityResult.ToList().Select(feature => new Facility((MapPoint)feature.Geometry)));

            // Query all features in the incident table.
            FeatureQueryResult incidentResult = await _incidentTable.QueryFeaturesAsync(queryParams);

            // Add all of the query results to facilities as new Incident objects.
            incidents.AddRange(incidentResult.ToList().Select(feature => new Incident((MapPoint)feature.Geometry)));

            // Set facilities and incident in parameters.
            ClosestFacilityParameters closestFacilityParameters = await _task.CreateDefaultParametersAsync();

                // Use the task to solve for the closest facility.
                ClosestFacilityResult result = await _task.SolveClosestFacilityAsync(closestFacilityParameters);

                for (int i = 0; i < incidents.Count; i++)
                    // Get the index of the closest facility to incident. (i) is the index of the incident, [0] is the index of the closest facility.
                    int closestFacility = result.GetRankedFacilityIndexes(i)[0];

                    // Get the route to the closest facility.
                    ClosestFacilityRoute route = result.GetRoute(closestFacility, i);

                    // Display the route on the graphics overlay.
                    MyMapView.GraphicsOverlays[0].Graphics.Add(new Graphic(route.RouteGeometry, _routeSymbols[i % _routeSymbols.Count]));

                // Disable the solve button.
                SolveRoutesButton.IsEnabled = false;

                // Enable the reset button.
                ResetButton.IsEnabled = true;
            catch (Esri.ArcGISRuntime.Http.ArcGISWebException exception)
                System.Windows.MessageBox.Show("An ArcGIS web exception occurred.\n" + exception.Message, "Sample error");

        private void ResetClick(object sender, EventArgs e)
            // Clear the route graphics.

            // Reset the buttons.
            SolveRoutesButton.IsEnabled = true;
            ResetButton.IsEnabled = false;
<UserControl x:Class="ArcGISRuntime.WPF.Samples.ClosestFacilityStatic.ClosestFacilityStatic"
            <esri:MapView x:Name="MyMapView" />
            <Border Style="{StaticResource BorderStyle}">
                    <Button x:Name="SolveRoutesButton"
                        Content="Solve Routes"
                        Click="SolveRoutesClick" />
                    <Button x:Name="ResetButton"
                        Click="ResetClick" />
See Also
Additional Examples
Hyperlink to ExampleDescription
ClosestFacilityDemonstrates how to solve a Closest Facility Task to find the closest route between a facility (hospital) and a incident (black cross).
ClosestFacilityStaticDemonstrates how to solve a Closest Facility Task to find the closest route between facilities and incidents.
FindServiceAreaDemonstrates how to find services areas around a point using the ServiceAreaTask. A service area shows locations that can be reached from a facility based off a certain impedance [travel time in this case]. Service areas for a two and five minute travel time are used. Barriers can also be added which can effect the service area by not letting traffic through and adding to the time to get to locations.