从 static 异步任务方法返回列表

Question

我有一个调用远程 API 的任务方法，该方法采用返回的 JSON 并将数据转换为 C# 对象，并在控制台上显示数据。 我希望这个方法也能返回列表，以便我可以在其他地方使用它，有人可以告诉我当我将方法签名更改为列表类型时我如何不断出错，所有回复都表示赞赏！ -

// asynchronous retrieve data from api
public static async Task GetUser()
{
     //baseUrl
     string baseUrl = "http://pokeapi.co/api/v2/pokemon/";
     try
     {
          // HttpClient implements a IDisposable interface
          using (HttpClient client = new HttpClient())

          //initiate Get Request 
          using (HttpResponseMessage res = await client.GetAsync(baseUrl))

          //convert response to c# object
          using (HttpContent content = res.Content)
          {
              //convert data content to string using await
              var data = await content.ReadAsStringAsync();

              //If the data is not null, parse(deserialize) the data to a C# object
              if (data != null)
              {
                   var result = JsonConvert.DeserializeObject<UserList>(data);
                   foreach (var u in result.Results)
                   {
                       Console.WriteLine("Name: {0} | Url: {1}", u.Name, u.Url);
                   }
              }
              else
              {
                  Console.WriteLine("No returned data");
              }
          }
     }
     catch (Exception exception)
     {
         Console.WriteLine(exception);
     }
}

Answer 1

// asynchronous retrieve data from api
public static async Task<List<User>> GetUser()
{
    //Connect to the webservice and get the data     
    //Parse the data into a list of Users
    var myList = parseResultJsonFromServer(serverResult);

    //myList is of type List<User> and ready to be returned
    return myList
 }

Answer 2

 public static async Task<UserList>  GetUser()
        {
            //baseUrl
            string baseUrl = "http://pokeapi.co/api/v2/pokemon/";
            try
            {
                // HttpClient implements a IDisposable interface
                using (HttpClient client = new HttpClient())
                {
                    //initiate Get Request 
                    using (HttpResponseMessage res = await client.GetAsync(baseUrl))
                    {
                        //convert response to c# object
                        using (HttpContent content = res.Content)
                        {
                            //convert data content to string using await
                            var data = await content.ReadAsStringAsync();

                            //If the data is not null, parse(deserialize) the data to a C# object
                            if (data != null)
                            {
                                return  JsonConvert.DeserializeObject<UserList>(data);

                            }
                            else
                            {
                                return null;
                            }
                        }
                    }
                }
            }
            catch (Exception exception)
            {
                return null;
            }
        }

您可以在之后使用 await ，如下所示：

UserList test =  await GetUser();