名称空间'SQLite.Net'中不存在类型或名称空间名称'Platform'

Question

我一直在研究一个可以使用的数据库示例，最终找到了一个并且正在尝试重新构造它，以便可以在需要的范围内使用它。

这里是我正在使用的链接https://www.c-sharpcorner.com/UploadFile/f8fa6c/use-sqlite-net-in-xamarin-forms/

错误所在的代码：

namespace PAPvolley.Droid
{
    public class SQLite_Android : ISQLite
    {

        public SQLite.Net.SQLiteConnection GetConnection()
        {
            var filename = "Team.db3";
            var documentspath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
            var path = Path.Combine(documentspath, filename);

            var platform = new SQLite.Net.Platform.XamarinAndroid.SQLitePlatformAndroid();
            var connection = new SQLite.Net.SQLiteConnection(platform, path);
            return connection;
        }
    }
} 

正在尝试建立的连接：

public interface ISQLite
{
     SQLiteConnection GetConnection();    
}

我的数据库：

public class TeamDB
    {
        private SQLiteConnection _sqlconnection;

        public TeamDB()
        {
            //Getting conection and Creating table
            _sqlconnection = DependencyService.Get<ISQLite>().GetConnection();
            _sqlconnection.CreateTable<Team>();
        }

        //Get all students
        public IEnumerable<Team> GetTeam()
        {
            return (from t in _sqlconnection.Table<Team>() select t).ToList();
        }

        //Get specific student
        public Team GetTean(int id)
        {
            return _sqlconnection.Table<Team>().FirstOrDefault(t => t.Id == id);
        }

        //Delete specific student
        public void DeleteTeam(int id)
        {
            _sqlconnection.Delete<Team>(id);
        }

        //Add new student to DB
        public void AddTeam(Team team)
        {
            _sqlconnection.Insert(team);
        }
    }

public class Team
    {
        [PrimaryKey, AutoIncrement]
        public int Id { get; set; }

        public string TeamName { get; set; }
        public Team()
        {
        }
    }

Answer 1

您使用的代码在sqlite-net-pcl的最新版本中已过时。

要在Android项目中创建SQLiteConnection，请安装最新的sqlite-net-pcl并执行以下步骤：

public class SQLite_Android : ISQLite
{

    public SQLiteConnection GetConnection()
    {
        var filename = "Team.db3";
        var documentspath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        var path = Path.Combine(documentspath, filename);

        var connection = new SQLiteConnection(path);
        return connection;
    }
}

您可以查看官方文档以获取更多信息：databases和using-sqlite-orm