微软的Web API：你如何做一个使用Server.Mappath？ [英] Microsoft Web API: How do you do a Server.MapPath?

问题描述

由于微软的Web API是不是MVC，你不能做这样的事情：

  VAR一个= Request.MapPath（〜）;
 

和本

 变种B =使用Server.Mappath（〜）;
 

，因为这些是System.Web命名空间之下，而不是System.Web.Http命名空间。

那么，你如何找出在网页API相对于服务器的路径？我以前做的MVC是这样的：

  VAR MYFILE = Request.MapPath（〜/内容/图片/+文件名）;
 

这将使我的绝对路径在磁盘上：

 C：\\的Inetpub \\ wwwroot的\\ myWebFolder \\内容\\图片\\ mypic.jpg
 

解决方案

您可以使用<一个href=\"http://msdn.microsoft.com/en-us/library/system.web.hosting.hostingenvironment.mappath.aspx\">HostingEnvironment.MapPath在任何情况下，其中的System.Web 对象，如 HttpContext.Current 不可用（如也从一个静态方法）。

  VAR mappedPath = System.Web.Hosting.HostingEnvironment.MapPath（〜/ SomePath）;
 

又见<一个href=\"http://stackoverflow.com/questions/944219/what-is-the-difference-between-server-mappath-and-hostingenvironment-mappath\">What是使用Server.Mappath之间的差异，HostingEnvironment.MapPath？

Since Microsoft Web API isn't MVC, you cannot do something like this:

var a = Request.MapPath("~");

nor this

var b = Server.MapPath("~");

because these are under the System.Web namespace, not the System.Web.Http namespace.

So how do you figure out the relative server path in Web API? I used to do something like this in MVC:

var myFile = Request.MapPath("~/Content/pics/" + filename);

Which would give me the absolute path on disk:

"C:\inetpub\wwwroot\myWebFolder\Content\pics\mypic.jpg"

解决方案

You can use HostingEnvironment.MapPath in any context where System.Web objects like HttpContext.Current are not available (e.g also from a static method).

var mappedPath = System.Web.Hosting.HostingEnvironment.MapPath("~/SomePath");

See also What is the difference between Server.MapPath and HostingEnvironment.MapPath?

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