private async void loginbtn_Click(object sender, RoutedEventArgs e) { (App.Current as App).NavigateText = unametxt.Text; var path = ApplicationData.Current.LocalFolder.Path + "/myDb1.DB"; var con = new SQLiteAsyncConnection(path); person p1 = new person(); List<person> allpersons = new List<person>(); allpersons = await con.QueryAsync<person>("select name,password from person where name=" + "\'" + unametxt.Text + "\'" + "and password="******"\'" + pwdtxt.Password + "\'"); if (allpersons.Count == 1) { p1 = allpersons[0]; Frame.Navigate(typeof(MainPage)); } }