/// <summary>
/// Handles the DownloadCompleted event of the IFileDownloader control.
/// </summary>
/// <param name="sender">
/// The source of the event.
/// </param>
/// <param name="e">
/// The <see cref="Microsoft.Practices.Prism.Modularity.DownloadCompletedEventArgs"/> instance containing
/// the event data.
/// </param>
private void IFileDownloader_DownloadCompleted(object sender, DownloadCompletedEventArgs e)
{
// A new IFileDownloader instance is created for each download.
// I unregister the event to allow for garbage collection.
var fileDownloader = (IFileDownloader)sender;
fileDownloader.DownloadProgressChanged -= this.IFileDownloader_DownloadProgressChanged;
fileDownloader.DownloadCompleted -= this.IFileDownloader_DownloadCompleted;
// I ensure the download completed is on the UI thread so that types can be loaded into the application domain.
if (!Deployment.Current.Dispatcher.CheckAccess())
{
Deployment.Current.Dispatcher.BeginInvoke(
new Action <DownloadCompletedEventArgs>(
param =>
ServiceLocator.Current.GetInstance <IExternalPartsLoader>()
.LoadExternalParts(param.Result, () => this.HandleModuleDownloaded(param))),
e);
}
else
{
ServiceLocator.Current.GetInstance <IExternalPartsLoader>()
.LoadExternalParts(e.Result, () => this.HandleModuleDownloaded(e));
}
}
private void IFileDownloader_DownloadCompleted(object sender, DownloadCompletedEventArgs e)
{
// A new IFileDownloader instance is created for each download.
// I unregister the event to allow for garbage collection.
IFileDownloader fileDownloader = (IFileDownloader)sender;
fileDownloader.DownloadProgressChanged -= this.IFileDownloader_DownloadProgressChanged;
fileDownloader.DownloadCompleted -= this.IFileDownloader_DownloadCompleted;
// I ensure the download completed is on the UI thread so that types can be loaded into the application domain.
if (!Deployment.Current.Dispatcher.CheckAccess())
{
Deployment.Current.Dispatcher.BeginInvoke(new Action <DownloadCompletedEventArgs>(this.HandleModuleDownloaded), e);
}
else
{
this.HandleModuleDownloaded(e);
}
}
private void HandleModuleDownloaded(DownloadCompletedEventArgs e)
{
Uri uri = (Uri)e.UserState;
List <ModuleInfo> moduleInfos = this.GetDownloadingModules(uri);
Exception error = e.Error;
if (error == null)
{
try
{
this.RecordDownloadComplete(uri);
Debug.Assert(!e.Cancelled, "Download should not be cancelled");
Stream stream = e.Result;
foreach (AssemblyPart part in GetParts(stream))
{
LoadAssemblyFromStream(stream, part);
}
this.RecordDownloadSuccess(uri);
}
catch (Exception ex)
{
error = ex;
}
finally
{
e.Result.Close();
}
}
foreach (ModuleInfo moduleInfo in moduleInfos)
{
this.RaiseLoadModuleCompleted(moduleInfo, error);
}
}
public void InvokeOpenReadCompleted(DownloadCompletedEventArgs args)
{
DownloadCompleted.Invoke(this, args);
}
private void HandleModuleDownloaded(DownloadCompletedEventArgs e)
{
Uri uri = (Uri)e.UserState;
List<ModuleInfo> moduleInfos = this.GetDownloadingModules(uri);
Exception error = e.Error;
if (error == null)
{
try
{
this.RecordDownloadComplete(uri);
Debug.Assert(!e.Cancelled, "Download should not be cancelled");
Stream stream = e.Result;
foreach (AssemblyPart part in GetParts(stream))
{
LoadAssemblyFromStream(stream, part);
}
this.RecordDownloadSuccess(uri);
}
catch (Exception ex)
{
error = ex;
}
finally
{
e.Result.Close();
}
}
foreach (ModuleInfo moduleInfo in moduleInfos)
{
this.RaiseLoadModuleCompleted(moduleInfo, error);
}
}
private void IFileDownloader_DownloadCompleted(object sender, DownloadCompletedEventArgs e)
{
// A new IFileDownloader instance is created for each download.
// I unregister the event to allow for garbage collection.
IFileDownloader fileDownloader = (IFileDownloader)sender;
fileDownloader.DownloadProgressChanged -= this.IFileDownloader_DownloadProgressChanged;
fileDownloader.DownloadCompleted -= this.IFileDownloader_DownloadCompleted;
// I ensure the download completed is on the UI thread so that types can be loaded into the application domain.
if (!Deployment.Current.Dispatcher.CheckAccess())
{
Deployment.Current.Dispatcher.BeginInvoke(new Action<DownloadCompletedEventArgs>(this.HandleModuleDownloaded), e);
}
else
{
this.HandleModuleDownloaded(e);
}
}
