C# Xamarin页面导航在任务继续中不起作用

C# Xamarin页面导航在任务继续中不起作用,c#,xamarin,async-await,task,C#,Xamarin,Async Await,Task,导航对象通过构造函数注入 public class CreateAccountViewModel : BaseViewModel { private INavigation navigation; public CreateAccountViewModel(INavigation navigation) { this.navigation = navigation; } 导航在ContinueWith中不起作用,我只想在CreateUserAs

导航对象通过构造函数注入

 public class CreateAccountViewModel : BaseViewModel
{
    private INavigation navigation;
    public CreateAccountViewModel(INavigation navigation)
    {
        this.navigation = navigation;
    }

导航在ContinueWith中不起作用,我只想在CreateUserAsync完成后导航到MyPage()。我该怎么做呢。提前谢谢。

你有例外吗?@StephenCleary:没有,我没有例外。在调试过程中,我还了解到MyPage()对象已成功创建并返回。为什么在第一次
wait
之后使用
ContinueWith
而不是内联执行代码?我怀疑
PopModalAsync
是否在
PushModalAsync
之前运行,因为嵌套异步。。
protected async Task ExecuteCreateAccountCommand()
    {
        if (validateDetails())
        {
            try
            {
                IsLoading = true;
                await SvcHelper.SvcHelper.CreateUserAsync(new Services.Models.LoginInfo
                  {
                      LoginId = Email,
                      LoginPassword = Password,
                      UserId = 0,
                      UserHandle = Cellno
                  }).ContinueWith(x =>
                  {

                      IsLoading = false;
                      (Forms.Context as Activity).RunOnUiThread(async () =>
                          {

                                await navigation.PushModalAsync(new MyPage());
                          }
                       );
                  });
            }
            catch (Exception exc)
            {
                System.Diagnostics.Debug.WriteLine("###Error### : " + exc.Message + exc.StackTrace);
            }
        }
        else
        {
            // details not valid
            //await DisplayAlert ("Alert", "Email Address not valid", "OK");
            return;
        }
        await navigation.PopModalAsync();
    }
}