我怎样才能读取ASP.Net MVC中的文件的内容？(How can I read the contents of a file in ASP.Net MVC?)

我怎样才能读取ASP.Net MVC中的文件的内容？(How can I read the contents of a file in ASP.Net MVC?)

我有一个ASP.Net MVC控制器操作，需要返回一个json结果（它实际上是jsonp，但这不重要），它包含另一个html文件的内容。 所以基本上，我想这样做：

[JsonpFilter] public JsonResult GetHeader() { var html = System.IO.File.ReadAllText("/htm/external/header.htm"); return Json(new { html = html }, JsonRequestBehavior.AllowGet); }

但是，它没有找到正确的文件。 它在C目录下查找（无法找到'C：\ htm \ external \ header.htm'路径的一部分），当我想要它查看服务器的根目录（当然是加上/ htm / external）。

我怎样才能读取这个文件？ 它是外部可用的，所以我想我可以为它创建一个单独的Web请求，但似乎我应该能够直接定位它。

I have an ASP.Net MVC controller action that needs to return a json result (it's actually jsonp, but that's not important) that contains the contents of another html file. So basically, I want to do this:

[JsonpFilter] public JsonResult GetHeader() { var html = System.IO.File.ReadAllText("/htm/external/header.htm"); return Json(new { html = html }, JsonRequestBehavior.AllowGet); }

However, it's not finding the right file. It's looking in the C directory (Could not find a part of the path 'C:\htm\external\header.htm'), when I want it to look at the server's root (plus /htm/external, of course).

How can I read this file in? It's externally available, so I guess I could make a separate web request for it, but it seems like I should be able to target it directly.

最满意答案

您可以使用HttpServerUtility.MapPath方法解析一个虚拟路径到其物理位置：

string html = System.IO.File.ReadAllText(HttpContext.Current.Server.MapPath("~/htm/external/header.htm"));

You can resolve a virutal path to its physical location using the HttpServerUtility.MapPath Method:

string html = System.IO.File.ReadAllText(HttpContext.Current.Server.MapPath("~/htm/external/header.htm"));