private void SaveButtonClick(object sender, EventArgs e)
{
// Get the values entered in the text fields.
string title = _titleTextField.Text.Trim();
string description = _descriptionTextField.Text.Trim();
string[] tags = _tagsTextField.Text.Split(',');
// Make sure all required info was entered.
if (string.IsNullOrEmpty(title) || string.IsNullOrEmpty(description) || tags.Length == 0)
{
new UIAlertView("Error", "Please enter a title, description, and some tags to describe the map.", (IUIAlertViewDelegate)null, "OK", null).Show();
return;
}
// Fire the OnMapInfoEntered event and provide the map item values.
if (OnMapInfoEntered != null)
{
// Create a new MapSavedEventArgs to contain the user's values.
var mapSaveEventArgs = new MapSavedEventArgs(title, description, tags);
// Raise the event.
OnMapInfoEntered(sender, mapSaveEventArgs);
}
}
// 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)
{
// Get the current map.
var myMap = _myMapView.Map;
try
{
// Show the activity indicator so the user knows work is happening.
_activityIndicator.StartAnimating();
// Get information entered by the user for the new portal item properties.
string title = e.Title;
string description = e.Description;
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.
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
{
// 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.
(myMap.Item as PortalItem).SetThumbnailWithImage(imageStream);
await myMap.SaveAsync();
// Report update was successful.
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)
{
// Report save error.
UIAlertController alert = UIAlertController.Create("Error", "Unable to save " + e.Title, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
finally
{
// Get rid of the item input controls.
_mapInfoUi.Hide();
_mapInfoUi = null;
// Hide the progress bar.
_activityIndicator.StopAnimating();
}
}
