private async void Button_Click(object sender, RoutedEventArgs e)
{
bool anyProblem = false;
var queryResult = await OfflineMapPackage.FindPackagesAsync(point);
if (queryResult.Status == OfflineMapPackageQueryStatus.Success)
{
foreach (OfflineMapPackage package in queryResult.Packages)
{
if (package.Status != OfflineMapPackageStatus.Downloaded)
{
var downloadRequestResult = await package.RequestStartDownloadAsync();
if (downloadRequestResult.Status != OfflineMapPackageStartDownloadStatus.Success)
{
anyProblem = true;
}
}
}
if (!anyProblem)
{
myButton.Visibility = Visibility.Collapsed;
myText.Visibility = Visibility.Visible;
}
}
}
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
myButton.Visibility = Visibility.Collapsed;
myText.Visibility = Visibility.Visible;
var queryResult = await OfflineMapPackage.FindPackagesAsync(point);
if (queryResult.Status == OfflineMapPackageQueryStatus.Success)
{
foreach (OfflineMapPackage package in queryResult.Packages)
{
if (package.Status != OfflineMapPackageStatus.Downloaded)
{
myButton.Visibility = Visibility.Visible;
myText.Visibility = Visibility.Collapsed;
}
}
}
base.OnNavigatedTo(e);
}
/// <summary>
/// This method finds all available Offline Map packages at the map center geopoint
/// </summary>
private async void findAtCenterButton_Click(object sender, RoutedEventArgs e)
{
resultsGrid.Children.Clear();
resultsGrid.RowDefinitions.Clear();
resultStatusTextBlock.Text = "";
OfflineMapPackageQueryResult result = await OfflineMapPackage.FindPackagesAsync(myMap.Center);
if (result.Status != OfflineMapPackageQueryStatus.Success)
{
resultStatusTextBlock.Text = "Error: " + result.Status;
}
else if (result.Packages.Count == 0)
{
resultStatusTextBlock.Text = "No maps found";
}
else
{
foreach (OfflineMapPackage package in result.Packages)
{
addToResultGrid(package);
}
}
}
private void addToResultGrid(OfflineMapPackage package)
{
// a descriptive name for the package
// ex: "Washington, USA (160 MB)"
string descriptiveName = package.DisplayName + ", " + package.EnclosingRegionName + " (" + nearestMegabyte(package.EstimatedSizeInBytes) + " MB)";
// current download status (Downloaded, NotDownloaded, Downloading, etc)
string downloadStatus = package.Status.ToString();
TextBlock packageNameTextBlock = new TextBlock()
{
Text = descriptiveName,
Margin = new Thickness(5),
VerticalAlignment = VerticalAlignment.Center,
};
TextBlock packageStatusTextBlock = new TextBlock()
{
Text = downloadStatus,
Margin = new Thickness(5),
VerticalAlignment = VerticalAlignment.Center,
};
Button packageDownloadButton = new Button()
{
Content = "Download",
IsEnabled = canDownload(package),
};
// event handler for Download button
packageDownloadButton.Click += async(sender, e) =>
{
// queue up the package for download
// requires offlineMapsManagement capability (see Package.appxmanifest)
OfflineMapPackageStartDownloadResult result = await package.RequestStartDownloadAsync();
// show any error
if (result.Status != OfflineMapPackageStartDownloadStatus.Success)
{
packageStatusTextBlock.Text = result.Status.ToString();
}
};
// listen for package status changes and update the UI (download status, download button enable/disable)
package.StatusChanged += async(sender, args) =>
{
// event might not be on the UI thread, so marshal if we need to update UI
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
packageStatusTextBlock.Text = package.Status.ToString();
packageDownloadButton.IsEnabled = canDownload(package);
});
};
Grid.SetRow(packageNameTextBlock, resultsGrid.RowDefinitions.Count);
Grid.SetColumn(packageNameTextBlock, 0);
Grid.SetRow(packageStatusTextBlock, resultsGrid.RowDefinitions.Count);
Grid.SetColumn(packageStatusTextBlock, 1);
Grid.SetRow(packageDownloadButton, resultsGrid.RowDefinitions.Count);
Grid.SetColumn(packageDownloadButton, 2);
resultsGrid.RowDefinitions.Add(new RowDefinition()
{
Height = GridLength.Auto
});
resultsGrid.Children.Add(packageNameTextBlock);
resultsGrid.Children.Add(packageStatusTextBlock);
resultsGrid.Children.Add(packageDownloadButton);
}
private static bool canDownload(OfflineMapPackage package)
{
// we can start a download if the package isn't downloaded or it's currently being deleted
return(package.Status == OfflineMapPackageStatus.NotDownloaded || package.Status == OfflineMapPackageStatus.Deleting);
}
