// Handle the OnMapInfoEntered event from the item input UI
// MapSavedEventArgs contains the title, description, and tags that were entered
private async void MapItemInfoEntered(object sender, MapSavedEventArgs e)
{
try
{
// Get information entered by the user for the new portal item properties
var title = e.Title;
var description = e.Description;
var tags = e.Tags;
// Get the current extent
var currentViewpoint = _mapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImg = await _mapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (!_mapViewModel.MapIsSaved)
{
// Call a method on MapViewModel to save the map as a new portal item
await _mapViewModel.SaveNewMapAsync(currentViewpoint, title, description, tags, thumbnailImg);
// Report a successful save
UIAlertController alert = UIAlertController.Create("Saved map", "Saved " + title + " to ArcGIS Online", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
else
{
// Map has previously been saved as a portal item, update it (title, description, and tags will remain the same)
_mapViewModel.UpdateMapItem();
// Report success
UIAlertController alert = UIAlertController.Create("Updated map", "Saved changes to " + title, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
}
catch (Exception ex)
{
// Report save error
UIAlertController alert = UIAlertController.Create("Error", ex.Message, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
finally
{
// Get rid of the item input controls
if (_mapInfoUI != null)
{
_mapInfoUI.Hide();
_mapInfoUI = null;
}
}
}
private async void OnSaveMapClicked(object sender, EventArgs e)
{
try
{
// Create a challenge request for portal credentials (OAuth credential request for arcgis.com)
CredentialRequestInfo challengeRequest = new CredentialRequestInfo();
// Use the OAuth implicit grant flow
challengeRequest.GenerateTokenOptions = new GenerateTokenOptions
{
TokenAuthenticationType = TokenAuthenticationType.OAuthImplicit
};
// Indicate the url (portal) to authenticate with (ArcGIS Online)
challengeRequest.ServiceUri = new Uri("https://www.arcgis.com/sharing/rest");
try
{
// Call GetCredentialAsync on the AuthenticationManager to invoke the challenge handler
await AuthenticationManager.Current.GetCredentialAsync(challengeRequest, false);
}
catch (System.OperationCanceledException)
{
// user canceled the login
throw new Exception("Portal log in was canceled.");
}
// See if the map has already been saved
if (!_mapViewModel.MapIsSaved)
{
// Map has not been saved ... save to portal for the first time
ShowSaveMapDialog();
}
else
{
// Map has previously been saved as a portal item, update it (title and description will remain the same)
_mapViewModel.UpdateMapItem();
// Report a successful update
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
dialogBuilder.SetTitle("Map Updated!");
dialogBuilder.SetMessage("Changes to map ('" + _mapViewModel.Map.Item.Title + "' were saved to ArcGIS Online");
dialogBuilder.Show();
}
}
catch (System.OperationCanceledException)
{
// user canceled the login
}
}
// Event handler to get information entered by the user and save the map
private async void SaveMapAsync(object sender, ArcGISRuntime.Samples.AuthorEditSaveMap.SaveMapEventArgs e)
{
try
{
// Get information entered by the user for the new portal item properties
var title = e.MapTitle;
var description = e.MapDescription;
var tags = e.Tags;
// Get the current extent displayed in the map view
var currentViewpoint = MyMapView.GetCurrentViewpoint(Esri.ArcGISRuntime.Mapping.ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImg = await MyMapView.ExportImageAsync();
// See if the map has already been saved
if (!_mapViewModel.MapIsSaved)
{
// Save the map as a portal item
await _mapViewModel.SaveNewMapAsync(currentViewpoint, title, description, tags, thumbnailImg);
// Report a successful save
DisplayAlert("Map Saved", "Saved '" + title + "' to ArcGIS Online!", "OK");
}
else
{
// Map has previously been saved as a portal item, update it (title, description, and tags will remain the same)
_mapViewModel.UpdateMapItem();
// Report success
DisplayAlert("Map Updated", "Saved changes to '" + title + "'", "OK");
}
}
catch (Exception ex)
{
// Show the exception message
DisplayAlert("Unable to save map", ex.Message, "OK");
}
}