windows-phone-7 - 更新隔离存储中的数据

Question

我有一个代码可以在隔离空间中添加电子邮件 ID 和名称。但它无法添加多个数据。另外，如果输入的数据不正确，我该如何更新？

namespace IsoStore
{

    public partial class MainPage : PhoneApplicationPage
    {

        // Constructor
        public MainPage()
        {
            InitializeComponent();
            IsolatedStorageSettings appSettings = IsolatedStorageSettings.ApplicationSettings;
        }


        private void button1_Click(object sender, RoutedEventArgs e)
        {
            IsolatedStorageSettings.ApplicationSettings.Add("email", "someone@somewhere.com");
            IsolatedStorageSettings.ApplicationSettings.Add("name", "myname");
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = (string)IsolatedStorageSettings.ApplicationSettings["email"];
            textBlock2.Text = (string)IsolatedStorageSettings.ApplicationSettings["name"];
        }
    }
}

Answer 1

为您清理了一些代码，使用辅助方法来完成存储:

namespace IsoStore
{
    public partial class MainPage : PhoneApplicationPage
    {
        private IsolatedStorageSettings _appSettings;

        // Constructor
        public MainPage()
        {
            InitializeComponent();
            _appSettings = IsolatedStorageSettings.ApplicationSettings;                
        }


        private void button1_Click(object sender, RoutedEventArgs e)
        {
            SaveSetting("email", "someone@somewhere.com");
            SaveSetting("name", "myname");
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = (string)_appSettings["email"];
            textBlock2.Text = (string)_appSettings["name"];
        }

        private void SaveSetting( string setting, string value )
        {
            if (_appSettings.Contains(setting))
            {
                _appSettings[setting] = value;
            }
            else
            {
                _appSettings.Add(setting, value);
            }
        }
    }
}

尝试一些其他示例来了解如何使用 IsolatedStorageSettings。

• How to: Store and Retrieve Application Settings Using Isolated Storage
• All about WP7 Isolated Storage - Store data in IsolatedStorageSettings