C# Geoprocessor.GetResultMapServiceLayer方法代码示例

        private async void StartButton_Click(object sender, RoutedEventArgs e)
        {
            StartButton.IsEnabled = false;
            ClearResultsButton.Visibility = Visibility.Collapsed;

            //get the user's input point
            var inputPoint = await mapView1.Editor.RequestPointAsync();

            //update UI elements
            MyProgressRing.Visibility = Windows.UI.Xaml.Visibility.Visible;
            MyProgressRing.IsActive = true;

            inputLayer.Graphics.Clear();
            inputLayer.Graphics.Add(new Graphic() { Geometry = inputPoint });

            Geoprocessor task = new Geoprocessor(new Uri("http://serverapps101.esri.com/arcgis/rest/services/ProbabilisticViewshedModel/GPServer/ProbabilisticViewshedModel"));

            var parameter = new GPInputParameter()
            {
                OutSpatialReference = new SpatialReference(102100)
            };
            parameter.GPParameters.Add(new GPFeatureRecordSetLayer("Input_Features", inputPoint));
            parameter.GPParameters.Add(new GPString("Height", HeightTextBox.Text));
            parameter.GPParameters.Add(new GPLinearUnit("Distance", LinearUnits.Miles, Convert.ToDouble(MilesTextBox.Text)));


            var result = await task.SubmitJobAsync(parameter);

            //Poll the server for results every 2 seconds.
            while (result.JobStatus != GPJobStatus.Cancelled && result.JobStatus != GPJobStatus.Deleted &&
                 result.JobStatus != GPJobStatus.Succeeded && result.JobStatus != GPJobStatus.TimedOut)
            {
                result = await task.CheckJobStatusAsync(result.JobID);

                //show the status
                StatusTextBlock.Text = string.Join(Environment.NewLine, result.Messages.Select(x => x.Description));


                await Task.Delay(2000);
            }
            if (result.JobStatus == GPJobStatus.Succeeded)
            {
                //get the results as a ArcGISDynamicMapServiceLayer
                StatusTextBlock.Text = "Finished processing. Retrieving results...";
                var resultLayer = task.GetResultMapServiceLayer(result.JobID);

                if (resultLayer != null)
                {
                    //Add an ID so that we can reference this layer (to remove it)
                    resultLayer.ID = "MyResultsLayer";

                    //Insert the results layer just beneath the input graphics layer.
                    //This allows us to see the input point at all times.
                    mapView1.Map.Layers.Insert(mapView1.Map.Layers.IndexOf(inputLayer), resultLayer);

                }

                //Reset the UI
                StatusTextBlock.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
                StartButton.IsEnabled = true;
                ClearResultsButton.Visibility = Visibility.Visible;
                MyProgressRing.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
                MyProgressRing.IsActive = false;
            }
        }

        private async void mapView1_Tap(object sender, MapViewInputEventArgs e)
        {
            if (BusyVisibility == Visibility.Visible)
            {
                MessageBox.Show("Please wait until the current operation is complete.");
                return;
            }

            // Show busy UI
            BusyVisibility = Visibility.Visible;
            StatusText = "Executing...";

            // Clear previous results
            TapPoints.Clear();
            if (m_viewshedLayer != null)
                Layers.Remove(m_viewshedLayer);

           
            // Create graphic and add to tap points
            var g = new Graphic() { Geometry = e.Location };
            TapPoints.Add(g);

            string error = null;

            // Initialize the Geoprocessing task with the viewshed calculation service endpoint
            Geoprocessor task = new Geoprocessor(new Uri("http://serverapps101.esri.com/ArcGIS/rest/services/" +
                "ProbabilisticViewshedModel/GPServer/ProbabilisticViewshedModel"));

            // Initialize input parameters
            var parameter = new GPInputParameter()
            {
                OutSpatialReference = SpatialReferences.WebMercator
            };
            parameter.GPParameters.Add(new GPFeatureRecordSetLayer("Input_Features", e.Location));
            parameter.GPParameters.Add(new GPString("Height", "50"));
            parameter.GPParameters.Add(new GPLinearUnit("Distance", LinearUnits.Miles, 10));

            try
            {
                var result = await task.SubmitJobAsync(parameter);

                // Poll the server for results every two seconds.
                while (result.JobStatus != GPJobStatus.Cancelled
                    && result.JobStatus != GPJobStatus.Deleted
                    && result.JobStatus != GPJobStatus.Failed
                    && result.JobStatus != GPJobStatus.Succeeded
                    && result.JobStatus != GPJobStatus.TimedOut)
                {
                    result = await task.CheckJobStatusAsync(result.JobID);

                    // show the status
                    var descriptions = result.Messages.Select(msg => msg.Description);
                    var status = string.Join(Environment.NewLine, descriptions);
                    if (!string.IsNullOrEmpty(status))
                        StatusText = status;

                    await Task.Delay(2000);
                }

                if (result.JobStatus == GPJobStatus.Succeeded)
                {
                    // get the results as a ArcGISDynamicMapServiceLayer
                    StatusText = "Calculation complete. Retrieving results...";
                    m_viewshedLayer = task.GetResultMapServiceLayer(result.JobID);
                    
                    if (m_viewshedLayer != null)
                    {
                        // Insert the results layer beneath the tap points layer.
                        // This allows the input point to be visible at all times.
                        Layers.Insert(Layers.IndexOf(m_tapPointsLayer), m_viewshedLayer);

                        // Wait until the viewshed layer is initialized
                        await m_viewshedLayer.InitializeAsync();
                    }
                    else
                    {
                        error = "No results returned";
                    }
                }
                else
                {
                    error = "Viewshed calculation failed";
                }
            }
            catch (Exception ex)
            {
                error = "Viewshed calculation failed: " + ex.Message;
            }

            // If operation did not succeed, notify user
            if (error != null)
                MessageBox.Show(error);

            // Hide busy UI
            BusyVisibility = Visibility.Collapsed;
            StatusText = "";
        }