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JobTGetResultAsync Method

Gets the job's result

Namespace:  Esri.ArcGISRuntime.Tasks
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version: 100.9.0.0
Syntax
C#
public Task<T> GetResultAsync()

Return Value

Type: TaskT
A task that represents the asynchronous get result operation. The value of the task result is an object of type T.
Remarks

For a successfully completed job, the job's result returns an collection of SyncLayerResult, typically the collection is empty. If individual edits failed then the result collection provides these errors grouped by each table using SyncLayerResult instances which in turn contain each edit error.

Only errors are reported, the feature edit results do not contain information about successful adds, deletes or updates.

Examples

Android

Example Name: ListGeodatabaseVersions

Connect to a service and list versions of the geodatabase.

Code example screen shot.

C#
// Copyright 2020 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 Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Tasks;
using Esri.ArcGISRuntime.Tasks.Geoprocessing;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;

namespace ArcGISRuntime.Samples.ListGeodatabaseVersions
{
    [Activity(ConfigurationChanges = Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "List geodatabase versions",
        category: "Geoprocessing",
        description: "Connect to a service and list versions of the geodatabase.",
        instructions: "When the sample loads, a list of geodatabase versions and their properties will be displayed.",
        tags: new[] { "conflict resolution", "data management", "database", "multi-user", "sync", "version" })]
    [Shared.Attributes.AndroidLayout("ListGeodatabaseVersions.axml")]
    public class ListGeodatabaseVersions : Activity
    {
        // Progress bar to show when the geoprocessing task is working
        private ProgressBar _myProgressBar;

        // Edit text to display the list of geodatabases
        private TextView _geoDatabaseText;

        // Url to used geoprocessing service
        private const string ListVersionsUrl =
            "https://sampleserver6.arcgisonline.com/arcgis/rest/services/GDBVersions/GPServer/ListVersions";

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            Title = "List geodatabase versions";

            // Create the UI, setup the control references and execute initialization
            CreateLayout();
            Initialize();
        }

        private async void Initialize()
        {
            // Set the UI to indicate that the geoprocessing is running
            SetBusy(true);

            try
            {
                // Get versions from a geodatabase
                IFeatureSet versionsFeatureSet = await GetGeodatabaseVersionsAsync();

                // Continue if we got a valid geoprocessing result
                if (versionsFeatureSet != null)
                {
                    // Create a string builder to hold all of the information from the geoprocessing
                    // task to display in the UI
                    StringBuilder myStringBuilder = new StringBuilder();

                    // Loop through each Feature in the FeatureSet
                    foreach (Feature version in versionsFeatureSet)
                    {
                        // Get the attributes (a dictionary of <key,value> pairs) from the Feature
                        IDictionary<string, object> myDictionary = version.Attributes;

                        // Loop through each attribute (a <key,value> pair)
                        foreach (KeyValuePair<string, object> attribute in myDictionary)
                        {
                            // Add the key and value strings to the string builder
                            myStringBuilder.AppendLine(attribute.Key + ": " + attribute.Value);
                        }

                        // Add a blank line after each Feature (the listing of geodatabase versions)
                        myStringBuilder.AppendLine();
                    }

                    // Display the results to the user
                    _geoDatabaseText.Text = myStringBuilder.ToString();
                }
            }
            catch (Exception e)
            {
                new AlertDialog.Builder(this).SetMessage(e.ToString()).SetTitle("Error").Show();
            }

            // Set the UI to indicate that the geoprocessing is not running
            SetBusy(false);
        }

        private async Task<IFeatureSet> GetGeodatabaseVersionsAsync()
        {
            // Results will be returned as a feature set
            IFeatureSet results = null;

            // Create new geoprocessing task
            GeoprocessingTask listVersionsTask = await GeoprocessingTask.CreateAsync(new Uri(ListVersionsUrl));

            // Create default parameters that are passed to the geoprocessing task
            GeoprocessingParameters listVersionsParameters = await listVersionsTask.CreateDefaultParametersAsync();

            // Create job that handles the communication between the application and the geoprocessing task
            GeoprocessingJob listVersionsJob = listVersionsTask.CreateJob(listVersionsParameters);
            try
            {
                // Execute analysis and wait for the results
                GeoprocessingResult analysisResult = await listVersionsJob.GetResultAsync();

                // Get results from the outputs
                GeoprocessingFeatures listVersionsResults = (GeoprocessingFeatures)analysisResult.Outputs["Versions"];

                // Set results
                results = listVersionsResults.Features;
            }
            catch (Exception ex)
            {
                // Error handling if something goes wrong
                if (listVersionsJob.Status == JobStatus.Failed && listVersionsJob.Error != null)
                {
                    AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
                    alertBuilder.SetTitle("Geoprocessing error");
                    alertBuilder.SetMessage("Executing geoprocessing failed. " + listVersionsJob.Error.Message);
                    alertBuilder.Show();
                }
                else
                {
                    AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
                    alertBuilder.SetTitle("Sample error");
                    alertBuilder.SetMessage("An error occurred. " + ex.ToString());
                    alertBuilder.Show();
                }
            }
            finally
            {
                // Set the UI to indicate that the geoprocessing is not running
                SetBusy(false);
            }

            return results;
        }

        private void SetBusy(bool isBusy = true)
        {
            // This function toggles running of the 'progress' control feedback status to denote if
            // the viewshed analysis is executing as a result of the user click on the map

            if (isBusy)
            {
                // Show busy activity indication
                _myProgressBar.Visibility = ViewStates.Visible;
            }
            else
            {
                // Remove the busy activity indication
                _myProgressBar.Visibility = ViewStates.Invisible;
            }
        }

        private void CreateLayout()
        {
            // Load the layout from the axml resource.
            SetContentView(Resource.Layout.ListGeodatabaseVersions);

            _myProgressBar = FindViewById<ProgressBar>(Resource.Id.progressBar);
            _geoDatabaseText = FindViewById<TextView>(Resource.Id.geoDatabaseText);
        }
    }
}
Examples

Xamarin Forms Android

Example Name: ListGeodatabaseVersions

Connect to a service and list versions of the geodatabase.

Code example screen shot.

C#
// 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.Data;
using Esri.ArcGISRuntime.Tasks;
using Esri.ArcGISRuntime.Tasks.Geoprocessing;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Text;
using Xamarin.Forms;

namespace ArcGISRuntime.Samples.ListGeodatabaseVersions
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "List geodatabase versions",
        category: "Geoprocessing",
        description: "Connect to a service and list versions of the geodatabase.",
        instructions: "When the sample loads, a list of geodatabase versions and their properties will be displayed.",
        tags: new[] { "conflict resolution", "data management", "database", "multi-user", "sync", "version" })]
    public partial class ListGeodatabaseVersions : ContentPage
    {

        // Url to used geoprocessing service
        private const string ListVersionsUrl =
            "https://sampleserver6.arcgisonline.com/arcgis/rest/services/GDBVersions/GPServer/ListVersions";

        public ListGeodatabaseVersions()
        {
            InitializeComponent ();

            // Create the UI, setup the control references and execute initialization
            Initialize();
        }

        private async void Initialize()
        {
            // Set the UI to indicate that the geoprocessing is running
            SetBusy(true);

            try
            {
                // Get versions from a geodatabase
                IFeatureSet versionsFeatureSet = await GetGeodatabaseVersionsAsync();

                // Continue if we got a valid geoprocessing result
                if (versionsFeatureSet != null)
                {
                    // Create a string builder to hold all of the information from the geoprocessing 
                    // task to display in the UI 
                    StringBuilder myStringBuilder = new StringBuilder();

                    // Loop through each Feature in the FeatureSet 
                    foreach (Feature version in versionsFeatureSet)
                    {
                        // Get the attributes (a dictionary of <key,value> pairs) from the Feature
                        IDictionary<string,object> myDictionary = version.Attributes;

                        // Loop through each attribute (a <key,value> pair)
                        foreach (KeyValuePair<string,object> attribute in myDictionary)
                        {
                            // Add the key and value strings to the string builder 
                            myStringBuilder.AppendLine(attribute.Key + ": " + attribute.Value);
                        }

                        // Add a blank line after each Feature (the listing of geodatabase versions)
                        myStringBuilder.AppendLine();
                    }

                    // Display the results to the user
                    VersionsLabel.Text = myStringBuilder.ToString();
                }
            }
            catch (Exception e)
            {
                await Application.Current.MainPage.DisplayAlert("Error", e.ToString(), "OK");
            }

            // Set the UI to indicate that the geoprocessing is not running
            SetBusy(false);
        }

        private async Task<IFeatureSet> GetGeodatabaseVersionsAsync()
        {
            // Results will be returned as a feature set
            IFeatureSet results = null;

            // Create new geoprocessing task 
            GeoprocessingTask listVersionsTask = await GeoprocessingTask.CreateAsync(new Uri(ListVersionsUrl));

            // Create default parameters that are passed to the geoprocessing task
            GeoprocessingParameters listVersionsParameters = await listVersionsTask.CreateDefaultParametersAsync();

            // Create job that handles the communication between the application and the geoprocessing task
            GeoprocessingJob listVersionsJob = listVersionsTask.CreateJob(listVersionsParameters);
            try
            {
                // Execute analysis and wait for the results
                GeoprocessingResult analysisResult = await listVersionsJob.GetResultAsync();

                // Get results from the outputs
                GeoprocessingFeatures listVersionsResults = (GeoprocessingFeatures)analysisResult.Outputs["Versions"];

                // Set results
                results = listVersionsResults.Features;
            }
            catch (Exception ex)
            {
                // Error handling if something goes wrong
                if (listVersionsJob.Status == JobStatus.Failed && listVersionsJob.Error != null)
                {
                    await Application.Current.MainPage.DisplayAlert("Geoprocessing error", "Executing geoprocessing failed. " + listVersionsJob.Error.Message, "OK");
                }
                else
                {
                    await Application.Current.MainPage.DisplayAlert("Sample error", "An error occurred. " + ex.ToString(), "OK");
                }
            }
            finally
            {
                // Set the UI to indicate that the geoprocessing is not running
                SetBusy(false);
            }

            return results;
        }
        private void SetBusy(bool isBusy = true)
        {
            // This function toggles running of the 'progress' control feedback status to denote if 
            // the viewshed analysis is executing as a result of the user click on the map

            if (isBusy)
            {
                // Show busy activity indication
                MyActivityIndicator.IsVisible = true;
                MyActivityIndicator.IsRunning = true;
            }
            else
            {
                // Remove the busy activity indication
                MyActivityIndicator.IsRunning = false;
                MyActivityIndicator.IsVisible = false;

            }
        }
    }
}
XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="ArcGISRuntime.Samples.ListGeodatabaseVersions.ListGeodatabaseVersions"
    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"
    xmlns:mapping="clr-namespace:Esri.ArcGISRuntime.Mapping;assembly=Esri.ArcGISRuntime">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <StackLayout Orientation="Vertical">
            <StackLayout Orientation="Horizontal">
                <Label Margin="10,0,0,0" Text="Current versions:" />
            </StackLayout>
        </StackLayout>
        <ActivityIndicator
            x:Name="MyActivityIndicator"
            Grid.Row="1"
            IsVisible="False" />
        <ScrollView Grid.Row="1">
            <Label Margin="10,0,0,0" x:Name="VersionsLabel" />
        </ScrollView>
    </Grid>
</ContentPage>
See Also
Additional Examples
Hyperlink to ExampleDescription
AnalyzeHotspotsUse a geoprocessing service and a set of features to identify statistically significant hot spots and cold spots.
AnalyzeViewshedCalculate a viewshed using a geoprocessing service, in this case showing what parts of a landscape are visible from points on mountainous terrain.
ApplyScheduledUpdatesApply scheduled updates to a downloaded preplanned map area.
DownloadPreplannedMapTake a map offline using a preplanned map area.
EditAndSyncFeaturesSynchronize offline edits with a feature service.
ExportTilesDownload tiles to a local tile cache file stored on the device.
GenerateGeodatabaseGenerate a local geodatabase from an online feature service.
GenerateOfflineMapTake a web map offline.
GenerateOfflineMapWithOverridesTake a web map offline with additional options for each layer.
GeodatabaseTransactionsUse transactions to manage how changes are committed to a geodatabase.
ListGeodatabaseVersionsConnect to a service and list versions of the geodatabase.
OfflineBasemapByReferenceUse the `OfflineMapTask` to take a web map offline, but instead of downloading an online basemap, use one which is already on the device.