private void NotifyProperties(Task task)
{
var propertyChanged = PropertyChanged;
if (propertyChanged == null)
{
return;
}
if (task.IsCanceled)
{
propertyChanged(this, PropertyChangedEventArgsCache.Get("Status"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("IsCanceled"));
}
else if (task.IsFaulted)
{
propertyChanged(this, PropertyChangedEventArgsCache.Get("Exception"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("InnerException"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("ErrorMessage"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("Status"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("IsFaulted"));
}
else
{
propertyChanged(this, PropertyChangedEventArgsCache.Get("Result"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("Status"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("IsSuccessfullyCompleted"));
}
propertyChanged(this, PropertyChangedEventArgsCache.Get("IsCompleted"));
propertyChanged(this, PropertyChangedEventArgsCache.Get("IsNotCompleted"));
}
private void OnPropertyChanged(string propertyName)
{
if (_massUpdateScopeCount == 0)
{
PropertyChanged?.Invoke(this, PropertyChangedEventArgsCache.Get(nameof(Count)));
}
}
public IDisposable EnterMassUpdate()
{
_massUpdateScopeCount++;
_waitingForMassUpdate = true;
void DisposeAction()
{
_massUpdateScopeCount--;
if (_massUpdateScopeCount == 0)
{
_waitingForMassUpdate = false;
var args = GetChangeArguments();
if (args == null)
{
return;
}
OnCollectionChanged(args);
OnPropertyChanged(PropertyChangedEventArgsCache.Get(nameof(Count)));
_reset = false;
_newItems = null;
_oldItems = null;
}
}
return(Disposable.FromAction(DisposeAction));
}
private bool SetValue <T>(ref T field, T value, [CallerMemberName] string propertyName = null)
{
if (EqualityComparer <T> .Default.Equals(field, value) == false)
{
field = value;
PropertyChanged?.Invoke(this, PropertyChangedEventArgsCache.Get(propertyName));
return(true);
}
return(false);
}
private void NotifyExecuteChange(bool startingExecution)
{
var propChanged = PropertyChanged;
if (startingExecution)
{
propChanged?.Invoke(this, PropertyChangedEventArgsCache.Get(nameof(Execution)));
}
propChanged?.Invoke(this, PropertyChangedEventArgsCache.Get(nameof(IsExecuting)));
OnCanExecuteChanged();
}