获得绝对URL弗朗一个ASP.NET MVC行动

问题描述

这可能是一个伪问题，但我无法找到一个明确的指示。我有一个MVC3 Web应用程序，其唯一目的是管理服务器中某些文件的备份POCO类。通常，它创建一个备份，返回的文件名给控制器，它发送的邮件的URL下载它。这工作得很好，但我不能建立要发送的绝对URL。没有哪个函数我使用的事情，我总是得到一个相对URL，如 /Backup/TheFile.zip 的，而不是如的 .我想：

This probably is a dummy question but I cannot find a clear indication. I have a POCO class in a MVC3 web application whose only purpose is managing the backup of some files in the server. Typically it creates a backup and returns the filename to the controller, which sends an email with the URL for downloading it. This works fine, but I cannot build the absolute URL to be sent. No matter which function I use, I always get a relative URL, like /Backup/TheFile.zip, rather than e.g. http://www.somesite.com/Backup/TheFile.zip. I tried:

VirtualPathUtility.ToAbsolute("~/Backup/SomeFile.zip");
HttpRuntime.AppDomainAppVirtualPath + "/Backup/SomeFile.zip";
Url.Content("~/Backup/SomeFile.zip");

但他们都返回类似的 /Backup/SomeFile.zip 的。任何想法？

推荐答案

您可以通过以下做到这一点：

You can do it by the following:

var urlBuilder =
    new System.UriBuilder(Request.Url.AbsoluteUri)
        {
            Path = Url.Action("Action", "Controller"),
            Query = null,
        };

Uri uri = urlBuilder.Uri;
string url = urlBuilder.ToString();
// or urlBuilder.Uri.ToString()

相反Url.Action的（）在此示例中，你也可以使用 Url.Content（），或任何路由方法，或者真的只是传递一个路径。

Instead of Url.Action() in this sample, you can also use Url.Content(), or any routing method, or really just pass a path.

但如果URL中去控制器 动作，还有一个更紧凑的方式：

But if the URL does go to a Controller Action, there is a more compact way:

var contactUsUriString =
    Url.Action("Contact-Us", "About",
               routeValues: null /* specify if needed */,
               protocol: Request.Url.Scheme /* This is the trick */);

这里的窍门是，一旦你调用任何路由方法时指定协议 /方案，你会得到一个绝对的URL。 我建议这个时候可能，但你也必须在第一个例子中的情况下，更通用的方法，你需要它。

The trick here is that once you specify the protocol/scheme when calling any routing method, you get an absolute URL. I recommend this one when possible, but you also have the more generic way in the first example in case you need it.

我在这里详细的博客上讲述它：结果
http://gurustop.net/blog/2012/03/23/writing-absolute-urls-to-other-actions-in-asp-net-mvc/

I have blogged about it in details here:
http://gurustop.net/blog/2012/03/23/writing-absolute-urls-to-other-actions-in-asp-net-mvc/

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