如何在Wp7中进行隔离存储？

Question

我想将数据存储在下拉列表中以及2个单选按钮之间我必须使用Window phone 7中的隔离存储来存储一个值a a如何在Wp7中进行隔离存储？

Answer 1

在最容易做到这一点的方式,是使用IsolatedStorageSettings.ApplicationSettings类/属性-它是一个必须存活无论发生什么你所有的小的临时数据有很大DUMPBIN.通常,该对象会自动从ISO商店保存/恢复,但要小心相信 - 如果您的应用程序正常关闭,它就可以正常工作.如果你想防范这种情况,例如,应用程序崩溃/等等 - 你仍然应该定期手动调用此对象的SAVE.

一些链接/ tuts:MSDN:非常好的解释一个例子:http://msdn.microsoft.com/en-us/library/cc221360 (v = vs95).aspx来自google http:// dotnet的第一个. dzone.com/articles/using-application-settings

Answer 2

这是我用于在WP7应用程序中加载和保存高分的代码片段,根据您的需要进行调整.它可以挽救数百万人的生命:D

private void LoadHighScore()
    {
        // open isolated storage, and load data from the savefile if it exists.
#if WINDOWS_PHONE
        using (IsolatedStorageFile savegameStorage = IsolatedStorageFile.GetUserStoreForApplication())
#else
        using (IsolatedStorageFile savegameStorage = IsolatedStorageFile.GetUserStoreForDomain())
#endif
        {
            if (savegameStorage.FileExists("guessthecard.txt"))
            {
                using (IsolatedStorageFileStream fs = savegameStorage.OpenFile("guessthecard.txt", System.IO.FileMode.Open))
                {
                    if (fs != null)
                    {
                        // Reload the saved high-score data.
                        byte[] saveBytes = new byte[4];
                        int count = fs.Read(saveBytes, 0, 4);
                        if (count > 0)
                        {
                            highScore = System.BitConverter.ToInt32(saveBytes, 0);
                        }
                    }
                }
            }
        }
    }

    // Save highscore

    public async void UnloadContent()
    {
        //  SAVE HIGHSCORE
        // Save the game state (in this case, the high score).
#if WINDOWS_PHONE
        IsolatedStorageFile savegameStorage = IsolatedStorageFile.GetUserStoreForApplication();
#else
        IsolatedStorageFile savegameStorage = IsolatedStorageFile.GetUserStoreForDomain();
#endif

        // open isolated storage, and write the savefile.
        IsolatedStorageFileStream fs = null;
        using (fs = savegameStorage.CreateFile("guessthecard.txt"))
        {
            if (fs != null)
            {
                // just overwrite the existing info for this example.
                byte[] bytes = System.BitConverter.GetBytes(highScore);
                fs.Write(bytes, 0, bytes.Length);
            }
        }

        try
        {
            CardGuess item = new CardGuess { Text = highScore.ToString() };
            await App.MobileService.GetTable<CardGuess>().InsertAsync(item);
        }
        catch(Exception e)
        {
        }



    }