是否可以在Windows Phone中使用现有的SQLite数据库？

Question

I am newbie to windows phone development. I have a requirement to develop a app which was developed in Android and iOS. I need to use the same SQLite database which was used in Android and iOS. Is it possible to use existing SQLite database in windows phone? If it is yes how to do it ?

Answer 1

for basic setup of sqlite use this link

first add the database file to project and change its properties to COPYALWAYS and "CONTENT" and now copy it to you local folder and make connection to the database using sqlite like this.

 public static SQLiteAsyncConnection connection;
    public static bool isDatabaseExisting;
    public static async void ConnectToDB()
    {
        try
        {
            StorageFile storageFile = await ApplicationData.Current.LocalFolder.GetFileAsync("DatabaseFinal.db");
            isDatabaseExisting = true;
        }
        catch
        {
            isDatabaseExisting = false;
        }
 if (!isDatabaseExisting)
        {
            try
            {
                StorageFile databaseFile = await Package.Current.InstalledLocation.GetFileAsync("DatabaseFinal.db");
                await databaseFile.CopyAsync(ApplicationData.Current.LocalFolder);
                isDatabaseExisting = true;
            }
            catch
            {
                isDatabaseExisting = false;
            }
        }

        if(isDatabaseExisting)
        connection = new SQLiteAsyncConnection(Path.Combine(ApplicationData.Current.LocalFolder.Path, "DelhiMetroDatabaseFinal.db"), true);
    }
}

}

this will create your connection too and for using databse for getting data from your db file use can use query like this

  public List<dataclass> getdata(string line_id, ref Boolean isdata)
    {
        List<datadataclass> query = new List<datadataclass>();

        try
        {
            query = dal.connection.Table<dataclass>().Where(i => i._id == line_id).ToListAsync().Result;
            isdataclass = true;
            return query;
        }
        catch (NullReferenceException e)
        {
            isdataclass = false;
        }

        return query;
    }

data class will have properties as your column defined in you database.

class dataclass
{
    public string _id { get; set; }
    public string name { get; set; }
    public int location { get; set; }
}