在ASP.Net应用程序中执行Server.MapPath反向操作的最有效方法是什么 [英] What is the most efficient way to perform the reverse of Server.MapPath in an ASP.Net Application

问题描述

我正在构建一个MVC应用程序，在该应用程序中，我正在从文件系统中读取文件列表，并且希望将该文件的相对URL传递给视图，最好以〜/"为前缀，以便选择任何视图cab会适当地呈现URL.

I am building an MVC application in which I am reading a list of files from the file system and I want to pass the relative URL to that file to the view, preferably prefixed with "~/" so that whatever view is selected cab render the URL appropriately.

为此，我需要枚举文件系统中的文件并将其物理路径转换回相对URL.我尝试了几种算法，但是我担心效率和最少的字符串操作.另外，我相信.Net Framework中没有可以执行此操作的东西，但是最新的MVC版本中有什么可以做到的吗?

To do this, I need to enumerate the files in the file system and convert their physical paths back to relative URLs. There are a few algorithms I've experimented with, but I am concerned about efficiency and minimal string operations. Also, I believe there's nothing in the .Net Framework that can perform this operation, but is there something in the latest MVC release that can?

推荐答案

目前，我不知道任何内置方法可以执行此操作，但这并不困难，我可以这样做:

At the moment I don't know any built-in method to do it, but it's not difficult, I do it like this:

• 我们需要获取Application根目录，并在新路径中将其替换为~
• 我们需要将反斜杠转换为斜杠

public string ReverseMapPath(string path)
{
    string appPath = HttpContext.Current.Server.MapPath("~");
    string res = string.Format("~{0}", path.Replace(appPath, "").Replace("\\", "/"));
    return res;
}

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