private async Task DoExecuteAsync(object parameter)
{
await Task.Factory.StartNew(p =>
{
// Invoke the action.
InvokeAction(p);
ReportProgress(() =>
{
// We are no longer executing.
IsExecuting = false;
// If we were cancelled, invoke the cancelled event - otherwise invoke executed.
if (IsCancellationRequested)
{
InvokeCancelled(new CommandEventArgs {
Parameter = p
});
}
else
{
InvokeExecuted(new CommandEventArgs {
Parameter = p
});
}
CancelCommand.NotifyCanExecuteChanged();
});
},
parameter,
_token);
}
public override async void DoExecute(object paramObject)
{
if (IsExecuting)
{
return;
}
var args = new CancelCommandEventArgs
{
Parameter = paramObject,
Cancel = false
};
InvokeExecuting(args);
if (args.Cancel)
{
return;
}
// We are executing.
IsExecuting = true;
CancelCommand.NotifyCanExecuteChanged();
_cts = new CancellationTokenSource();
_token = _cts.Token;
await DoExecuteAsync(paramObject);
}
