Create and save map

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 // Copyright 2021 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 ArcGIS.Helpers; using Esri.ArcGISRuntime.Geometry; using Esri.ArcGISRuntime.Mapping; using Esri.ArcGISRuntime.Portal; using Esri.ArcGISRuntime.UI; using System; using System.Collections.Generic; using System.IO; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls;  namespace ArcGIS.WPF.Samples.AuthorMap {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "Create and save map",  category: "Map",  description: "Create and save a map as an ArcGIS `PortalItem` (i.e. web map).",  instructions: "1. Select the basemap and layers you'd like to add to your map.",  tags: new[] { "ArcGIS Online", "OAuth", "portal", "publish", "share", "web map" })]  [ArcGIS.Samples.Shared.Attributes.ClassFile("Helpers\\ArcGISLoginPrompt.cs")]  public partial class AuthorMap  {  // String array to store names of the available basemaps  private readonly string[] _basemapNames =  {  "Light Gray",  "Topographic",  "Streets",  "Imagery",  "Ocean"  };   // Dictionary of operational layer names and URLs  private Dictionary<string, string> _operationalLayerUrls = new Dictionary<string, string>  {  {"World Elevations", "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Elevation/WorldElevations/MapServer"},  {"World Cities", "https://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer/" },  {"US Census Data", "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer"}  };   public AuthorMap()  {  this.Loaded += (s, e) => { _ = Initialize(); };  InitializeComponent();  }   private async Task Initialize()  {  ArcGISLoginPrompt.SetChallengeHandler();   bool loggedIn = await ArcGISLoginPrompt.EnsureAGOLCredentialAsync();   // Show a plain gray map in the map view.  if (loggedIn)  {  MyMapView.Map = new Map(BasemapStyle.ArcGISLightGray);  }  else MyMapView.Map = new Map();   // Fill the basemap combo box with basemap names  BasemapListBox.ItemsSource = _basemapNames;   // Add a listener for changes in the selected basemap.  BasemapListBox.SelectionChanged += BasemapSelectionChanged;   // Fill the operational layers list box with layer names  OperationalLayerListBox.ItemsSource = _operationalLayerUrls;   // Update the extent labels whenever the view point (extent) changes  MyMapView.ViewpointChanged += (s, evt) => UpdateViewExtentLabels();  }   #region UI event handlers   private void BasemapSelectionChanged(object sender, SelectionChangedEventArgs e)  {  // Call a function to set the basemap to the one selected  ApplyBasemap(e.AddedItems[0].ToString());  }   private void OperationalLayerSelectionChanged(object sender, SelectionChangedEventArgs e)  {  // Call a function to add the chosen layers to the map  AddOperationalLayers();  }   private void NewMapClicked(object sender, RoutedEventArgs e)  {  // Create a new map (will not have an associated PortalItem)  MyMapView.Map = new Map(BasemapStyle.ArcGISLightGray);  MyMapView.Map.Basemap.LoadAsync();   // Reset UI to be consistent with map  BasemapListBox.SelectedIndex = 0;  OperationalLayerListBox.SelectedIndex = -1;  }   private async void SaveMapClicked(object sender, RoutedEventArgs e)  {  try  {  // Show the progress bar so the user knows work is happening  SaveProgressBar.Visibility = Visibility.Visible;   // Get the current map  Map myMap = MyMapView.Map;   // Load the current map before saving to portal.  await myMap.LoadAsync();   // Apply the current extent as the map's initial extent  myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);   // Get the current map view for the item thumbnail  RuntimeImage thumbnailImg = await MyMapView.ExportImageAsync();   // See if the map has already been saved (has an associated portal item)  if (myMap.Item == null)  {  // Get information for the new portal item  string title = TitleTextBox.Text;  string description = DescriptionTextBox.Text;  string[] tags = TagsTextBox.Text.Split(',');   // Make sure all required info was entered  if (string.IsNullOrEmpty(title) || string.IsNullOrEmpty(description) || tags.Length == 0)  {  throw new Exception("Please enter a title, description, and some tags to describe the map.");  }   // Call a function to save the map as a new portal item  await SaveNewMapAsync(MyMapView.Map, title, description, tags, thumbnailImg);   // Report a successful save  MessageBox.Show("Saved '" + title + "' to ArcGIS Online!", "Map Saved");  }  else  {  // This is not the initial save, call SaveAsync to save changes to the existing portal item  await myMap.SaveAsync();   // Get the file stream from the new thumbnail image  Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();   // Update the item thumbnail  ((PortalItem)myMap.Item).SetThumbnail(imageStream);  await myMap.SaveAsync();   // Report update was successful  MessageBox.Show("Saved changes to '" + myMap.Item.Title + "'", "Updates Saved");  }  }  catch (Exception ex)  {  // Report error message  MessageBox.Show("Error saving map to ArcGIS Online: " + ex.Message);  }  finally  {  // Hide the progress bar  SaveProgressBar.Visibility = Visibility.Hidden;  }  }   #endregion UI event handlers   private void ApplyBasemap(string basemapName)  {  // Set the basemap for the map according to the user's choice in the list box.  switch (basemapName)  {  case "Light Gray":  MyMapView.Map.Basemap = new Basemap(BasemapStyle.ArcGISLightGray);  break;   case "Topographic":  MyMapView.Map.Basemap = new Basemap(BasemapStyle.ArcGISTopographic);  break;   case "Streets":  MyMapView.Map.Basemap = new Basemap(BasemapStyle.ArcGISStreets);  break;   case "Imagery":  MyMapView.Map.Basemap = new Basemap(BasemapStyle.ArcGISImagery);  break;   case "Ocean":  MyMapView.Map.Basemap = new Basemap(BasemapStyle.ArcGISOceans);  break;  }   MyMapView.Map.Basemap.LoadAsync();  }   private void AddOperationalLayers()  {  // Clear all operational layers from the map  Map myMap = MyMapView.Map;  myMap.OperationalLayers.Clear();   // Loop through the selected items in the operational layers list box  foreach (KeyValuePair<string, string> item in OperationalLayerListBox.SelectedItems)  {  // Get the service uri for each selected item  KeyValuePair<string, string> layerInfo = item;  Uri layerUri = new Uri(layerInfo.Value);   // Create a new map image layer, set it 50% opaque, and add it to the map  ArcGISMapImageLayer layer = new ArcGISMapImageLayer(layerUri)  {  Opacity = 0.5  };  myMap.OperationalLayers.Add(layer);  }  }   private async Task SaveNewMapAsync(Map myMap, string title, string description, string[] tags, RuntimeImage thumb)  {  await ArcGISLoginPrompt.EnsureAGOLCredentialAsync();   // Get the ArcGIS Online portal (will use credential from login above)  ArcGISPortal agsOnline = await ArcGISPortal.CreateAsync();   // Save the current state of the map as a portal item in the user's default folder  await myMap.SaveAsAsync(agsOnline, null, title, description, tags, thumb);  }   private void UpdateViewExtentLabels()  {  // Get the current view point for the map view  Viewpoint currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);  if (currentViewpoint == null) { return; }   // Get the current map extent (envelope) from the view point  Envelope currentExtent = currentViewpoint.TargetGeometry as Envelope;   // Project the current extent to geographic coordinates (longitude / latitude)  Envelope currentGeoExtent = (Envelope)currentExtent.Project(SpatialReferences.Wgs84);   // Fill the app text boxes with min / max longitude (x) and latitude (y) to four decimal places  XMinTextBox.Text = currentGeoExtent.XMin.ToString("0.####");  YMinTextBox.Text = currentGeoExtent.YMin.ToString("0.####");  XMaxTextBox.Text = currentGeoExtent.XMax.ToString("0.####");  YMaxTextBox.Text = currentGeoExtent.YMax.ToString("0.####");  }  } }