如何检查正在重写的单个异步C#任务的布尔返回值？[副本]

Question

我有这个方法：

    private async Task BackArrowTappedHandler()
    {
        Task<bool> sp = SavePageDataAsync();
        await Task.WhenAll(sp);
        var saveResult = sp.Result; 

        if (!saveResult)
            return;
        if (Device.RuntimePlatform is Device.iOS)
            await Navigation.PopModalAsync();
        else
            await Shell.Current.Navigation.PopAsync();
    }

它调用一个我可能想重写也可能不想重写的方法：

    public virtual async Task<bool> SavePageDataAsync()
    {
        return true;
    }

    public async Task<bool> OnSavePageAsync()
    {
        var IsValueLess = false;
        if (daily < 20)
        {
            msg1 = "Minimum words";
            msg2 = "Please set a number greater than 20";
            IsValueLess = true;
        }
       
        var alertDeckPopup = new AlertPopup(msg2);
        await PopupNavigation.Instance.PushAsync(alertDeckPopup);

        if (IsValueLess)
            return false;
        else
            return true;
    }

Answer 1

您可以在异步方法上使用await运算符来等待子methid的结果

bool sp = await SavePageDataAsync();
if(sp) 
{
// do action if true
}