// A click handler for the save map button
private void SaveMapButtonClick(object sender, EventArgs e)
{
try
{
// Get information for the new portal item
string title = _mapTitleTextbox.Text;
string description = _mapDescriptionTextbox.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.");
}
// Create a new OnSaveMapEventArgs object to store the information entered by the user
OnSaveMapEventArgs mapSavedArgs = new OnSaveMapEventArgs(title, description, tags);
// Raise the OnSaveClicked event so the main activity can handle the event and save the map
OnSaveClicked?.Invoke(this, mapSavedArgs);
// Close the dialog
Dismiss();
}
catch (Exception ex)
{
// Show the exception message (dialog will stay open so user can try again)
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(Activity);
alertBuilder.SetTitle("Error");
alertBuilder.SetMessage(ex.Message);
alertBuilder.Show();
}
}
private async void SaveMapAsync(object sender, OnSaveMapEventArgs e)
{
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
// Get the current map
Map myMap = _myMapView.Map;
try
{
// Show the progress bar so the user knows work is happening
_progressBar.Visibility = ViewStates.Visible;
// Get information entered by the user for the new portal item properties
string title = e.MapTitle;
string description = e.MapDescription;
string[] tags = e.Tags;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = _myMapView.GetCurrentViewpoint(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 (has an associated portal item)
if (myMap.Item == null)
{
// Call a function to save the map as a new portal item
await SaveNewMapAsync(myMap, title, description, tags, thumbnailImg);
// Report a successful save
alertBuilder.SetTitle("Map saved");
alertBuilder.SetMessage("Saved '" + title + "' to ArcGIS Online!");
alertBuilder.Show();
}
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
alertBuilder.SetTitle("Updates saved");
alertBuilder.SetMessage("Saved changes to '" + myMap.Item.Title + "'");
alertBuilder.Show();
}
}
catch (Exception ex)
{
// Show the exception message
alertBuilder.SetTitle("Unable to save map");
alertBuilder.SetMessage(ex.Message);
alertBuilder.Show();
}
finally
{
// Hide the progress bar
_progressBar.Visibility = ViewStates.Invisible;
}
}
