如何在 Windows Phone 运行时获取 StorageFolder 中的所有文件? [英] How to get all files in a StorageFolder in Windows Phone Runtime?

问题描述

我想获取文件夹及其子文件夹中的所有文件.但是像这样的平面查询:

I want to get all files in a folder and its sub folders. but a flat query like this:

var allFiles = await myFolder.GetFilesAsync(Windows.Storage.Search.CommonFileQuery.OrderByName);

抛出一个 ArgumentException 异常:

发生了System.ArgumentException"类型的第一次机会异常

A first chance exception of type 'System.ArgumentException' occurred

附加信息:值不在预期范围内.

Additional information: Value does not fall within the expected range.

在我一一查询子文件夹之前，没有其他办法了吗?

before I query subfolders one by one, isn't there any other way?

推荐答案

您需要所有作为根文件夹后代的文件和文件夹，而不仅仅是浅枚举.对于大多数文件夹，枚举所有内容及其子文件夹内容的唯一方法是:

You want all the files and folder which are a descendent of the root folder, not just the shallow enummeration. For most folders the only way to enumerate all the contents and its subfolders content is:

1. 对文件使用 StorageFolder.GetFilesAsync()
2. 使用 StorageFolder.GetFoldersAsync() 检索所有子文件夹
3. 对您在第 2 步中找到的所有子文件夹递归重复.

如果您正在寻找特定类型的媒体，有一种解决方法.说明位于此处.这几个位置和 CommonFile/FolderQuery 选项的组合将使设备深入搜索媒体并返回有序结果.

There is a workaround for this if you are looking for a particular type of media. The instructions are here. These few combinations of locations and CommonFile/FolderQuery options will give a device deep search for media and return the ordered results.

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