public IMvxViewModel ReloadViewModel <TParameter>(IMvxViewModel <TParameter> viewModel, TParameter param, MvxViewModelRequest request, IMvxBundle?savedState, IMvxNavigateEventArgs?navigationArgs = null)
where TParameter : notnull
{
var viewModelLocator = FindViewModelLocator(request);
var parameterValues = new MvxBundle(request.ParameterValues);
try
{
return(viewModelLocator.Reload(viewModel, param, parameterValues, savedState, navigationArgs));
}
catch (Exception exception)
{
throw exception.MvxWrap(
$"Failed to construct and initialize ViewModel for type {request.ViewModelType} from locator {viewModelLocator.GetType().Name} - check InnerException for more information");
}
}
// Reload should be used to re-run cached ViewModels lifecycle if required.
public IMvxViewModel ReloadViewModel(IMvxViewModel viewModel, MvxViewModelRequest request, IMvxBundle savedState, IMvxNavigateEventArgs navigationArgs)
{
var viewModelLocator = FindViewModelLocator(request);
var parameterValues = new MvxBundle(request.ParameterValues);
try
{
viewModel = viewModelLocator.Reload(viewModel, parameterValues, savedState, navigationArgs);
}
catch (Exception exception)
{
throw exception.MvxWrap(
"Failed to reload a previously created created ViewModel for type {0} from locator {1} - check InnerException for more information",
request.ViewModelType, viewModelLocator.GetType().Name);
}
return(viewModel);
}
public IMvxViewModel LoadViewModel(MvxViewModelRequest request, IMvxBundle?savedState, IMvxNavigateEventArgs?navigationArgs = null)
{
if (request.ViewModelType == typeof(MvxNullViewModel))
{
return(new MvxNullViewModel());
}
var viewModelLocator = FindViewModelLocator(request);
var parameterValues = new MvxBundle(request.ParameterValues);
try
{
return(viewModelLocator.Load(request.ViewModelType !, parameterValues, savedState, navigationArgs));
}
catch (Exception exception)
{
throw exception.MvxWrap(
$"Failed to construct and initialize ViewModel for type {request.ViewModelType} from locator {viewModelLocator.GetType().Name} - check InnerException for more information");
}
}
public static IMvxBundle SaveStateBundle(this IMvxViewModel viewModel)
{
var toReturn = new MvxBundle();
var methods = viewModel.GetType()
.GetMethods()
.Where(m => m.Name == "SaveState" && m.ReturnType != typeof(void) && !m.GetParameters().Any());
foreach (var methodInfo in methods)
{
// use methods like `public T SaveState()`
var stateObject = methodInfo.Invoke(viewModel, new object[0]);
if (stateObject != null)
{
toReturn.Write(stateObject);
}
}
// call the general `public void SaveState(bundle)` method too
viewModel.SaveState(toReturn);
return(toReturn);
}
public ValueTask <IMvxViewModel> ReloadViewModel <TParameter>(IMvxViewModel <TParameter> viewModel, TParameter param, MvxViewModelRequest request, IMvxBundle?savedState, IMvxNavigateEventArgs?navigationArgs)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
var viewModelLocator = FindViewModelLocator(request);
var parameterValues = new MvxBundle(request.ParameterValues);
try
{
viewModel = viewModelLocator.Reload(viewModel, param, parameterValues, savedState, navigationArgs);
}
catch (Exception exception)
{
throw exception.MvxWrap(
"Failed to reload a previously created created ViewModel for type {0} from locator {1} - check InnerException for more information",
request.ViewModelType !, viewModelLocator.GetType().Name);
}
return(new ValueTask <IMvxViewModel>(viewModel));
}
public IMvxViewModel LoadViewModel <TParameter>(MvxViewModelRequest request, TParameter param, IMvxBundle savedState)
{
if (request.ViewModelType == typeof(MvxNullViewModel))
{
return(new MvxNullViewModel());
}
var viewModelLocator = FindViewModelLocator(request);
IMvxViewModel <TParameter> viewModel = null;
var parameterValues = new MvxBundle(request.ParameterValues);
try
{
viewModel = viewModelLocator.Load(request.ViewModelType, param, parameterValues, savedState);
}
catch (Exception exception)
{
throw exception.MvxWrap(
"Failed to construct and initialize ViewModel for type {0} from locator {1} - check InnerException for more information",
request.ViewModelType, viewModelLocator.GetType().Name);
}
return(viewModel);
}
protected MvxPresentationHint(MvxBundle body)
{
Body = body;
}
