Xamarin 表单和 Asp.Net Web Api

Question

我一直在关注关于将我的 xamarin 表单应用程序连接到 asp.net web api 的 youtube 教程。不幸的是，我的 Listview 没有被来自 api 的数据填充。

Xamarin 表单应用具有以下文件：

RestClient.cs

public class RestClient<T>    {
         private const string WebServiceUrl = "http://localhost:49864/api/Oppotunities/";

         public async Task<List<T>> GetAsync()
         {
             var httpClient = new HttpClient();

             var json = await httpClient.GetStringAsync(WebServiceUrl);

             var OppotunityList = JsonConvert.DeserializeObject<List<T>>(json);

             return OppotunityList ;
         } }

MainViewModel.cs

 public MainViewModel()
           {
               InitializeDataAsync();

           }

           private async Task InitializeDataAsync()
           {
               var oppotunitiesServices = new OppotunitiesServices();
               OppotunitiesList = await oppotunitiesServices.GetOppotunitiesAsync();

           }

OppotunityServices.cs

public class OppotunitiesServices
    {
        public async Task<List<Oppotunity>> GetOppotunitiesAsync()
        {


            RestClient<Oppotunity> restClient = new RestClient<Oppotunity >();
            var oppotunitiesList =  await restClient.GetAsync();


            return oppotunitiesList;
        }

    }

Answer 1

如果您从模拟器进行调试，则不应使用localhost 访问您的开发机器。您必须使用 IP 地址或正在运行的服务。

您可以直接从模拟器的浏览器测试 IP 地址，这样您就不会浪费时间启动/停止应用程序来调试...

希望对你有帮助