/// <summary>
/// Tear down any app domain that currently exists, create a new one and reload the control in
/// the given app domain.
/// </summary>
public async void Reload()
{
UnloadDomain();
Status = ControlHostStatus.Waiting;
if (!File.Exists(_configuration.PathToAssembly))
{
// try again in a little bit
_timer.Start();
return;
}
AdditionalInformation = null;
Status = ControlHostStatus.Loading;
try
{
// creating an app-domain (and loading everything etc.) takes a while, so do it on a background
// thread and resume later.
await Task.Run(() =>
{
_lastDomain = AppDomainUtils.CreateShadowAppDomain("Document-Host")
.ResolveAssembliesFrom(_rootDictionary);
_currentEntryPoint = _lastDomain.CreateInstanceOf <InAppDomainController>()
.FindEntryPoint(_assemblyToObserve);
});
// dictionaries are serialized (read: copied) instead of passed by reference across app-domains
Dictionary <string, string> tempConfiguration;
var reference = _currentEntryPoint.Initialize(_configuration.Data, out tempConfiguration);
_configuration.Data = tempConfiguration;
var proxyElement = FrameworkElementAdapters.ContractToViewAdapter(reference);
Host = proxyElement;
proxyElement.Loaded += delegate
{
Keyboard.Focus(proxyElement);
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
Host.MoveFocus(request);
};
Status = ControlHostStatus.Valid;
}
catch (Exception exception)
{
AdditionalInformation = exception.ToString();
UnloadDomain(ignoreShutdown: true);
Status = ControlHostStatus.Waiting;
}
}
/// <summary> Shuts down the current entry point. </summary>
private void UnloadDomain(bool ignoreShutdown = false)
{
if (_lastDomain == null)
{
return;
}
if (!ignoreShutdown && _currentEntryPoint != null)
{
try
{
_configuration.Data = _currentEntryPoint.Shutdown(_configuration.Data);
_currentEntryPoint = null;
}
catch (Exception)
{
}
}
Host = null;
AppDomain.Unload(_lastDomain);
_lastDomain = null;
}