private async void ProcessImageRequest(BaseImageryRestRequest imageRequest)
{
try
{
RequestProgressBar.Visibility = Visibility.Visible;
RequestProgressBarText.Text = string.Empty;
RequestUrlTbx.Text = imageRequest.GetRequestUrl();
//Process the request by using the ServiceManager.
using (var s = await ServiceManager.GetImageAsync(imageRequest))
{
var bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.StreamSource = s;
bitmapImage.EndInit();
ImageBox.Source = bitmapImage;
}
ImageTab.IsSelected = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
RequestProgressBar.Visibility = Visibility.Collapsed;
}
/// <summary>
/// Processes a REST requests that returns an image stream.
/// </summary>
/// <param name="imageryRequest">The REST request to process.</param>
/// <returns>A stream containing an image.</returns>
public static async Task <Stream> GetImageAsync(BaseImageryRestRequest imageryRequest)
{
if (imageryRequest is ImageryRequest)
{
var r = imageryRequest as ImageryRequest;
r.GetMetadata = false;
if (r.Pushpins != null && (r.Pushpins.Count > 18 || r.Style != null))
{
//Make a post request when there are more than 18 pushpins as there is a risk of URL becoming too large for a GET request.
return(await ServiceHelper.PostStringAsync(new Uri(r.GetPostRequestUrl()), r.GetPushpinsAsString(), null).ConfigureAwait(false));
}
else
{
return(await ServiceHelper.GetStreamAsync(new Uri(r.GetRequestUrl())).ConfigureAwait(false));
}
}
else
{
return(await ServiceHelper.GetStreamAsync(new Uri(imageryRequest.GetRequestUrl())).ConfigureAwait(false));
}
}
