private async void OnItemTapped(object sender, ItemTappedEventArgs e)
{
// Call a function to clear existing credentials.
ClearCredentials();
try
{
// Get the selected sample.
SampleInfo item = (SampleInfo)e.Item;
// Load offline data before showing the sample.
if (item.OfflineDataItems != null)
{
CancellationTokenSource cancellationSource = new CancellationTokenSource();
// Show the wait page.
await Navigation.PushModalAsync(new WaitPage(cancellationSource) { Title = item.SampleName }, false);
#if WINDOWS_UWP
// Workaround for bug with Xamarin Forms UWP.
await Task.WhenAll(
Task.Delay(100),
DataManager.EnsureSampleDataPresent(item, cancellationSource.Token)
);
#else
// Wait for the sample data download.
await DataManager.EnsureSampleDataPresent(item, cancellationSource.Token);
#endif
// Remove the waiting page.
await Navigation.PopModalAsync(false);
}
// Get the sample control from the selected sample.
ContentPage sampleControl = (ContentPage)SampleManager.Current.SampleToControl(item);
// Create the sample display page to show the sample and the metadata.
SamplePage page = new SamplePage(sampleControl, item);
// Show the sample.
await Navigation.PushAsync(page, true);
}
catch (OperationCanceledException)
{
// Remove the waiting page.
await Navigation.PopModalAsync(false);
await Application.Current.MainPage.DisplayAlert("", "Download cancelled", "OK");
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Exception occurred on OnItemTapped. Exception = " + ex);
}
}
private async void ShowSample(SampleInfo item)
{
// Clear Credentials
foreach (Credential cred in AuthenticationManager.Current.Credentials)
{
AuthenticationManager.Current.RemoveCredential(cred);
}
try
{
// Load offline data before showing the sample.
if (item.OfflineDataItems != null)
{
// Show the wait page.
await Navigation.PushModalAsync(new WaitPage { Title = item.SampleName }, false);
// Wait for the sample data download.
await DataManager.EnsureSampleDataPresent(item);
// Remove the waiting page.
await Navigation.PopModalAsync(false);
}
// Get the sample control from the selected sample.
var sampleControl = (ContentPage)SampleManager.Current.SampleToControl(item);
// Create the sample display page to show the sample and the metadata.
SamplePage page = new SamplePage(sampleControl, item);
// Show the sample.
await Navigation.PushAsync(page, true);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Exception occurred on OnItemTapped. Exception = " + ex);
}
}
private async void ShowSample(SampleInfo item)
{
// Clear Credentials
foreach (Credential cred in AuthenticationManager.Current.Credentials)
{
AuthenticationManager.Current.RemoveCredential(cred);
}
if (item.FormalName == "AuthorMap")
{
// Remove API key if opening Create and save map sample.
ApiKeyManager.DisableKey();
}
else
{
// Ensure API key is set in ArcGIS Runtime environment.
ApiKeyManager.EnableKey();
}
try
{
// Load offline data before showing the sample.
if (item.OfflineDataItems != null)
{
CancellationTokenSource cancellationSource = new CancellationTokenSource();
// Show the wait page.
await Navigation.PushModalAsync(new WaitPage(cancellationSource) { Title = item.SampleName }, false);
#if WINDOWS_UWP
// Workaround for bug with Xamarin Forms UWP.
await Task.WhenAll(
Task.Delay(100),
DataManager.EnsureSampleDataPresent(item, cancellationSource.Token)
);
#else
// Wait for the sample data download.
await DataManager.EnsureSampleDataPresent(item, cancellationSource.Token);
#endif
// Remove the waiting page.
await Navigation.PopModalAsync(false);
}
// Get the sample control from the selected sample.
ContentPage sampleControl = (ContentPage)SampleManager.Current.SampleToControl(item);
// Create the sample display page to show the sample and the metadata.
SamplePage page = new SamplePage(sampleControl, item);
// Show the sample.
await Navigation.PushAsync(page, true);
}
catch (OperationCanceledException)
{
// Remove the waiting page.
await Navigation.PopModalAsync(false);
await Application.Current.MainPage.DisplayAlert("", "Download cancelled", "OK");
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Exception occurred on OnItemTapped. Exception = " + ex);
}
}