Question

我尝试通过Akavache加载缓存数据，但我不知道为什么我不能正确。我尝试获取登录后已经缓存的FullName和Email，所以我在我的＆＃34; CachedUser＆＃34;模型但不知道为什么它说没有FullName和Email的定义。这是我的CachedUser模型

namespace KGVC.Models
{
    public class CachedUsers
    {
        public string FullName { get; set; }
        public string Email { get; set; }
    }
}

这是我试图实现

的Akavache中的getobject代码

   public void GetDataCache(object sender, EventArgs e)
        {
            var loaded =  BlobCache.LocalMachine.GetObject<CachedUsers>("usercached");

            txtemail.Text = loaded.FullName;
            txtfullname.Text = loaded.FullName.ToString();
        }

这是缓存用户代码

 public  void CacheUser(AuthenticationResult ar)
        {
            JObject user = ParseIdToken(ar.IdToken);
            var cache = new CachedUsers
            {
                FullName = user["name"]?.ToString(),
                Email = user["emails"]?.ToString()

            };
             BlobCache.LocalMachine.InsertObject("usercached", cache);

        }

这是我得到的完整错误消息

'IObservable<CachedUsers>' does not contain a definition for 'FullName' and no extension method 'FullName' accepting a first argument of type 'IObservable<CachedUsers>' could be found (are you missing a using directive or an assembly reference?)

这里有什么问题，因为我认为我的代码没有任何问题。你能想出来吗？

Answer 1

您需要等待它

 public async void GetDataCache(object sender, EventArgs e)
 {
    var loaded = await BlobCache.LocalMachine.GetObject<CachedUsers>("usercached");

    txtemail.Text = loaded.FullName;
    txtfullname.Text = loaded.FullName.ToString();
 }

或订阅IObservable：

 public async void GetDataCache(object sender, EventArgs e)
 {
    var loaded = await BlobCache.LocalMachine.GetObject<CachedUsers>("usercached").Subscribe(user => {
        // TODO might need to wrap this in a Device.BeginInvokeOnMainThread
        txtemail.Text = user.FullName;
        txtfullname.Text = user.FullName.ToString();
    });
 }

查看async / await和IObservable对象的概念，以便更好地理解这些特定情况下的概念和问题。

IObservable不包含定义，但实际上有定义

1 个答案: