/// <summary>
/// Gets this window's unity-mapped model and connection string
/// </summary>
/// <returns></returns>
private bool ResolveDependencies(out string message)
{
message = "";
try
{
// CONFIGURE UNITY (DEPENDENCY INJECTION)
// _dependencyResolver = new UnityResolver();
// THE POINT HERE IS TO INSTANTIATE THE MODEL (IMPLEMENTING 'IAppViewModel') FROM UNITY DI
// ADD ANY RUNTIME ARGUMENTS TO THE CONSTRUCTOR OF THE INJECTED OBJECT
// THE 'disp' CONSTRUCTOR IS NOT USED ANYMORE, BUT THIS OPERATIONAL CODE IS LEFT IN
// PLACE FOR WHEN A CONSTUCTOR ARGUMENT IS NEEDED FOR THE INJECTED TYPE
// ANY ARGUMENTS NOT USED ARE IGNORED
Dictionary <string, object> modelConstructorArguments = new Dictionary <string, object>();
// key is the actual constructor parameter name, value is the value to pass in.
modelConstructorArguments.Add("disp", this.Dispatcher);
// GET THE UNITY MAPPING NAME USED TO REFERENCE THE IMPLEMENTATION OF THE MODEL FROM
// THIS DLL'S CONFIG FILE - NOT THE EXECUTING APP.CONFIG
// THE dll.config SETTING IS DESIGNATED BY "<WINDOW CLASS NAME> + '_model'"
// <!-- Unity Mapping name for Model class used for view 'MainWindow.xaml' -->
// <appSettings>
// <add key="MainWindow_model" value="ImporterViewModel"/>
// </appSettings>
object modelUnityMappingName = null;
ConfigurationManager.GetDllConfigAppSetting(this.GetType().Name + "_model", out modelUnityMappingName);
if (string.IsNullOrEmpty((string)modelUnityMappingName))
{
throw new Exception("Could not find dll configuration setting '" + this.Name + "_model' which is used to specify the Unity DI mapping for the view model object");
}
// ASSIGN THE INJECTED MODEL TO THIS WINOW'S DataContext -
this._appViewModel = UnityResolver.Instance.GetObjectByAlias <IAppViewModel>((string)modelUnityMappingName, modelConstructorArguments);
if (this._appViewModel == null)
{
_logger.Error("Unable to create view model - check unity log and configuration");
}
else
{
// ASSIGN THE MODEL TO THIS WINOW'S DataContext
this._appViewModel.ModelEvent += OnViewModelEvent;
if (this._appViewModel.ReadyForUse)
{
this.DataContext = this._appViewModel;
this._appViewModel.Initialize();
}
else
{
this._appViewModel.Created += new CreationComplete(delegate()
{
this.DataContext = this._appViewModel;
this._appViewModel.Initialize();
});
}
_logger.InfoFormat("DataContext assigned to {0}.", this._appViewModel.GetType().FullName);
this._appViewModel.ModelEvent -= OnViewModelEvent;
return(true);
}
}
catch (System.Security.Authentication.AuthenticationException)
{
message = "Login Failure - see system administrator";
this._logger.ErrorFormat("Login Failure while running under {0}\\{1}", Environment.UserDomainName, Environment.UserName);
this._appViewModel.Dispose();
}
catch (Exception ex)
{
this._logger.ErrorFormat("Unity resolver error - {0}{1}", ex.Message, ex.InnerException == null ? "" : ", " + ex.InnerException.Message);
message = "Error resolving dependencies. Please check log and make necessary adjustments to 'Unity.config' file";
}
return(false);
}
public AppWindowViewModel(IAppViewModel appViewModel)
{
_appViewModel = appViewModel;
}
