我如何在Windows 8.1获得本地文件夹的大小（WinRT的） [英] How do I get Local folder size in Windows 8.1 (winRT)

问题描述

我有一个8.1的Windows Store应用。我试图找到本地文件夹Size.?(e.g。210 MB）

I have an Windows 8.1 Store App. I am trying to find the Local Folder Size.?(e.g. 210 MB)

我有这将下载一些内容到我的本地文件夹中的应用程序。我想检查我的本地文件夹的大小（如多少MB目前有）。

I have an application which would download some of content into my local folder. I want to check the size of my local folder (such as how many MB are currently there).

我试图寻找通过MSDN和谷歌，但一直没能。找到它的任何东西。

I have tried looking through MSDN and Google but haven't been able to find anything on it.

注：我有一个文件夹和子这样不仅文件，这是在本地文件夹..

Note : I have a folder and subfolder so not only files which is in local folder..

推荐答案

您可以通过的 LocalFolder 。 COM / EN-US /库/窗/应用/ windows.storage.applicationdata.localfolder.ASPx相对=nofollow> ApplicationData.LocalFolder 财产。

You are able to access the LocalFolder via the ApplicationData.LocalFolder property.

这 LocalFolder 是的 StorageFolder 对象。 StorageFolder 有一个名为的 GetBasicPropertiesAsync 。

This LocalFolder is a StorageFolder object. StorageFolder has a method called GetBasicPropertiesAsync.

GetBasicPropertiesAsync 返回 BasicProperties 对象。这 BasicProperties 对象具有的 尺寸 属性，它会告诉你该项目所涉及的大小（文件夹或文件）。我相信，尺寸是字节（ ULONG ）。

GetBasicPropertiesAsync returns a BasicProperties object. This BasicProperties object has a Size property which tells you the size of the item in question (folder or file). I believe that Size is in bytes (a ulong).

完整的命令可在单个行完成在异步的方法是这样的：

The complete command can be done in a single line in an async method like this:

（等待ApplicationData.LocalFolder.GetBasicPropertiesAsync（））大小;

您也可以拆分的每一步，如果你需要的任何。其他信息

You can also split up each step if you need any other information.

编辑：很显然，这并不工作，以及希望。该解决方案是创建一个查询并总结了所有文件。你可以使用LINQ做到这一点。

Apparently this does not work as well as hoped. The solution is to create a query and sum up all of the files. You can do this using Linq.

using System.Linq;

// Query all files in the folder. Make sure to add the CommonFileQuery
// So that it goes through all sub-folders as well
var folders = ApplicationData.LocalFolder.CreateFileQuery(CommonFileQuery.OrderByName);

// Await the query, then for each file create a new Task which gets the size
var fileSizeTasks = (await folders.GetFilesAsync()).Select(async file => (await file.GetBasicPropertiesAsync()).Size);

// Wait for all of these tasks to complete. WhenAll thankfully returns each result
// as a whole list
var sizes = await Task.WhenAll(fileSizeTasks);

// Sum all of them up. You have to convert it to a long because Sum does not accept ulong.
var folderSize = sizes.Sum(l => (long) l);

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