optimization - 清除 Windows Phone 7 应用程序的 isolatedstoragestore 的最快方法是什么？

Question

我目前正在开发一个将数据写入 IsolatedStorageStore 的应用程序。作为应用程序的一部分，我想实现一个“清除所有数据/重置”按钮，但是枚举所有存在的文件和所有存在的文件夹需要花费大量时间。是否有神奇的“重置”方法或我可以使用的方法，或者我应该专注于优化手动删除过程？

或者我是否可以不提供此类功能，而让用户卸载/重新安装应用程序以进行重置？

我可怕的删除所有文件的方法如下:

    /// <summary>
    /// deletes all files in specified folder
    /// </summary>
    /// <param name="sPath"></param>
    public static void ClearFolder(String sPath, IsolatedStorageFile appStorage)
    {    
        //delete all files
        string[] filenames = GetFilenames(sPath);
        if (filenames != null)
        {
            foreach (string sFile in filenames)
            {
                DeleteFile(System.IO.Path.Combine(sPath, sFile));
            }
        }

        //delete all subfolders if directory still exists
        try
        {
            foreach (string sDirectory in appStorage.GetDirectoryNames(sPath))
            {
                ClearFolder(System.IO.Path.Combine(sPath, sDirectory) + @"\", appStorage);
            }
        }
        catch (DirectoryNotFoundException ex)
        {
            //current clearing folder was deleted / no longer exists - return
            return;
        }

        //try to delete this folder
        try
        {
            appStorage.DeleteDirectory(sPath);
        }
        catch (ArgumentException ex) { }

    }

    /// <summary>
    /// Attempts to delete a file from isolated storage - if the directory will be empty, it is also removed.
    /// </summary>
    /// <param name="sPath"></param>
    /// <returns></returns>
    public static void DeleteFile(string sPath)
    {
        using (IsolatedStorageFile appStorage = IsolatedStorageFile.GetUserStoreForApplication())
        {
            appStorage.DeleteFile(sPath);

            String sDirectory = System.IO.Path.GetDirectoryName(sPath);
            //if this was the last file inside this folder, remove the containing folder
            if (appStorage.GetFileNames(sPath).Length == 0)
            {
                appStorage.DeleteDirectory(sDirectory);
            }
        }
    }

    /// <summary>
    /// Returns an array of filenames in a given directory
    /// </summary>
    /// <param name="sHistoryFolder"></param>
    /// <returns></returns>
    public static string[] GetFilenames(string sDirectory)
    {
        using (IsolatedStorageFile appStorage = IsolatedStorageFile.GetUserStoreForApplication())
        {
            try
            {
                return appStorage.GetFileNames(sDirectory);
            }
            catch (DirectoryNotFoundException)
            {
                return null;
            }
        }
    }

Answer 1

您正在寻找 Remove()方法。

像这样使用它:

using (var store = IsolatedStorageFile.GetUserStoreForApplication()) 
{ 
    store.Remove();
}