asp.net mvc的映像路径和虚拟目录 [英] asp.net mvc image path and virtual directory

问题描述

我知道这已经是重复的，但我一直在通过的相关信息，成群的涉水，我无法得到它的工作。

I know this has to be a duplicate, but I've been wading through the hordes of information on this and I can't get it work.

我试图让网站客户端的服务器上工作，他们有安装在虚拟目录的站点。我没有这个设置，在本地，所以我在这里盲目。

I'm trying to get a site working on a client's server and they have the site installed in a virtual directory. I don't have this setup, locally, so I'm flying blind here.

我试图建立到图像的路径。 （这是对于Facebook OpenGraph元数据）。

I'm trying to build a path to an image. (it's for Facebook OpenGraph Meta data).

我需要的路径，图像是完全合格的，绝对URL。我试过很多东西，但似乎没有任何工作。下面的code输出一个相对URL，但是这不会起作用。

I need the path to the image to be a fully-qualified, absolute url. I've tried so many things, but nothing seems to work. The code below outputs a relative url, but this will not work.

<% var urlHelper = VirtualPathUtility.ToAbsolute("~/static/images/image.jpg");%>
<meta property="og:image" content="<%=urlHelper%>" />

输出：

<meta property="og:image" content="/static/images/image.jpg" /> 

我也试过：

<% var serverHost = HttpContext.Current.Request.Url; %>
<meta property="og:image" 
          content="<%=serverHost + "/static/images/image.jpg"%>" />

但是，这产生：

<meta property="og:image" 
   content="http://localhost:51863/ViewFile.aspx/static/images/image.jpg" />

我在寻找 http://example.com/virtualdirectory/static/images /image.jpg

任何帮助将非常AP preciated。我真的不希望有硬code中的网址。

Any help will be much appreciated. I really don't want to have to hard-code the url.

谢谢，
斯科特

Thanks, Scott

我忘了提，我的第一个尝试是Url.Content（〜/ .... JPG），但输出相对URL，而不是abosolute之一。

I neglected to mention that my very first attempt was Url.Content("~/....jpg) but that outputs a relative url, not an abosolute one.

推荐答案

您可以写一个小的扩展方法：

You could write a small extension method:

public static class UrlExtensions
{
    public static string AbsoluteContent(this UrlHelper url, string contentPath)
    {
        var requestUrl = url.RequestContext.HttpContext.Request.Url;
        return string.Format(
            "{0}{1}",
            requestUrl.GetLeftPart(UriPartial.Authority),
            url.Content(contentPath)
        );
    }
}

和则：

<meta property="og:image" content="<%= Url.AbsoluteContent("~/static/images/image.jpg") %>" />

这将输出示例：

<meta property="og:image" content="http://localhost:7864/static/images/image.jpg" />

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