如何保存复选框的状态

Question

如何使用C＃在Visual Studio Ultimate 2012中保存复选框的状态。即使在我再次重新打开应用程序终止后，最后查看的状态应该可见？该怎么办？请你帮我解释一下代码。

提前致谢.....

J.Visali

Answer 1

在这里，您应该找到所需的一切：http://msdn.microsoft.com/en-us/library/windows/apps/hh986968.aspx

Answer 2

对于大多数Windows 8商店应用，数据可以大致分为两类：

1. 应用数据 - 设置，文件，缓存，会话状态，自定义列表等。
2. 用户数据 - 文档，凭据，照片，音乐等。

这篇文章 Data Persistence & Application Life-Cycle Management应该可以帮助您了解您需要什么类型的持久性。 数据可以作为应用程序设置保存在键值对中，但也可以保存为应用程序文件，它通常存储在应用程序具有的沙盒文件系统访问中

作为一个简单的例子，您应该：

   // Reference to Local Application Settings.
   Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings; 
   // Reference to Roaming Application Settings.
   Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;  
   // Persisting simple Application Settings.
   localSettings.Values["myOption1"] = myBox1.isChecked;
   roamingSettings.Values["myOption2"] = myBox2.isChecked;

   // Reading settings back.
   var mySavedOption1 = (bool)(localSettings.Values["myOption1"]);
   var mySavedOption2 = (bool)(roamingSettings.Values["myOption2"]);

修改

经过测试的示例：

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);

        // Reference to Local Application Settings.
        Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
        // Reading settings back.
        object mySavedOption1;
        localSettings.Values.TryGetValue("myOption1Key", out mySavedOption1);
        if (mySavedOption1 != null)
            myOption1.IsChecked = (bool)mySavedOption1;
    }

    private void myOption1_Checked_1(object sender, RoutedEventArgs e)
    {
        // Reference to Local Application Settings.
        Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
        // Persisting simple Application Settings.
        localSettings.Values["myOption1Key"] = myOption1.IsChecked;

    }

在xaml中：<CheckBox x:Name="myOption1" Grid.Row="1" Checked="myOption1_Checked_1" Unchecked="myOption1_Checked_1"/>

Answer 3

您可以使用应用提供的本地存储空间：

Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
localSettings.Values["CheckboxState"] = "checked";

然后，您可以通过从值中提取状态来使用相同的localSettings进行恢复。

Answer 4

应用设置是存储应用数据的最佳方式......最佳解决方案 http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.applicationdata.localsettings