如何检查一个字符串是否是一个有效的Windows目录/文件夹路径？ [英] How to check if a string is a valid Windows directory/folder path?

问题描述

我想检查，如果用户输入的字符串是一个有效的安装目标，然后检查它是否存在，如果不创建它。我的问题是与验证，以确保目标字符串格式正确无误。

I trying to check if the user-inputted string is a valid install destination, then check if it exists, and create it if not. My problem is with validating that the destination string is formatted properly.

我目前使用 IO.Directory.Exists（字符串路径）和作品除了当用户没有正确格式化字符串罚款。该方法将返回false，但我不能在事后创建文件夹。

I am currently using IO.Directory.Exists( String path ) and works fine except when the user did not format the string properly. That method will return false, but I won't be able to create the folder afterwards.

谷歌搜索建议我用正则表达式来检查格式正确。我有一个正则表达式0经验，我想知道这是否会工作。下面是我发现的：

Googling suggested I use regular expressions to check if the format is proper. I have 0 experience with regular expressions, and am wondering if that will work. Here's what I found:

Regex r = new Regex( @"^(([a-zA-Z]\:)|(\\))(\\{1}|((\\{1})[^\\]([^/:*?<>""|]*))+)$" );
return r.IsMatch( path );

这会在与 Directory.Exists（）组合，给我的够好的方法来检查如果路径是有效的，它的存在？我知道这将与操作系统和其他因素而有所不同，但程序是针对窗口用户只。

Would this, in combination with Directory.Exists(), give me a good enough method to check if the path is valid and it exists? I know this will vary with OS and other factors, but the program is targeted for Windows users only.

推荐答案

Path.GetFullPath ;如果路径无效，它会抛出异常。

Call Path.GetFullPath; it will throw exceptions if the path is invalid.

要禁止相对路径（如字），呼叫< A HREF =htt​​p://msdn.microsoft.com/en-us/library/system.io.path.ispathrooted> Path.IsPathRooted 。

To disallow relative paths (such as Word), call Path.IsPathRooted.

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