如何将数据从我的REST Web服务发送到我的Xamarin应用程序？

Question

我的程序需要帮助。我声明我还是初学者，如果这个问题很简单，那就很抱歉。

问题：我使用SqlConnection完成了我的REST Web服务的开发。我现在的问题是使我的xamarin表单应用程序（当前是静态的）上的数据动态化。

下面是我静态声明数据的代码的一部分：

public class MockDataStore: IDataStore <Item>
    {
        List <Item> items;

        // Allow me to assign values ​​to the declared variables

        public MockDataStore ()
        {
            items = new List <Item> ();
            var mockItems = new List <Item>
            {
                
                new Item {Id = Guid.NewGuid (). ToString (), Nome_cognome = "1xxx1", Email = "xxx", Phone = 3333333333, Role = "Programmer", ActivityMattina = "Is updating the databases", ActivitiesAfternoon = "Presentation ", Number_Inside = 123},
                               new Item {Id = Guid.NewGuid (). ToString (), Nome_cognome = "2xx2", Email = "xxx", Phone = 3333333333, Role = "Programmer", ActivityMattina = "Is updating the databases", ActivitiesAfternoon = "Presentation ", Number_Inside = 123},

                new Item {Id = Guid.NewGuid (). ToString (), Nome_cognome = "3xxx3", Email = "3xxx3", Phone = 3333333333, Role = "Programmer", ActivityMattina = "Is updating the databases", ActivitiesAfternoon = "Presentation ", Number_Inside = 123},
           };
            foreach (var item in mockItems)
            {
                Items.Add (item);
            }
        }

相反，这是我在webservices上运行的查询：

public List <Agenda> Rooms ()
        {
            List <Ansagenda> list = new List <Ansagenda> ();

            string queryString = "SELECT CDSISM, DESISM, TYPE, GSM, EMAIL, IP FROM [dbo]. [ANSIS00F] WHERE CDSISM = '44 'AND ANSIS00F.TIPO =' X ';";
            // string queryString = "SELECT CDSISM, DESISM, TYPE, GSM, EMAIL, IP, AGSIS, AGMAT, AGPOM, AGDAT, ORDER FROM [dbo]. [ANSIS00F] INNER JOIN [dbo]. [AGENDA] ON [CDSISM] = [AGSIS] WHERE ANSIS00F.TIPO = 'X' ORDER BY DESISM ASC, AGDAT ASC; ";

            SqlCommand command = new SqlCommand (queryString, connection);
            SqlDataAdapter adapter = new SqlDataAdapter (command);
            DataTable table = new DataTable ();

            connection.Open ();
            adapter.Fill (table);
            connection.Close ();

            foreach (DataRow dr in table.Rows)
            {
                list.Add (new Ansagenda
                {
                    CDSISM = Convert.ToString (dr ["CDSISM"]),
                    DESISM = Convert.ToString (dr ["DESISM"]),
                    TYPE = Convert.ToString (dr ["TYPE"]),
                    GSM = Convert.ToString (dr ["GSM"]),
                    EMAIL = Convert.ToString (dr ["EMAIL"]),
                    IP = Convert.ToString (dr ["IP"]),
                });
            }
            return list;
        }

Answer 1

如果您想在应用程序中显示服务器中的数据，您需要以某种方式获取它们。您可以通过向服务器发出HTTP请求来实现此目的。让我们从一个问题开始：你可以向服务器询问议程列表吗？你能从浏览器/ POSTMAN那样做吗？

我强烈建议你阅读this article并尝试在你的应用程序中做类似的事情。这并不难，使用Refit有很多优点。

当然，您可以自己提出请求但我不确定当有许多库能够这样做时是否有意义。