一个ASP.NET MVC控制器可以返回一个图像？

问题描述

我可以创建一个控制器，仅仅返回一个图像资产？

Can I create a Controller that simply returns an image asset?

我想这个路线通过逻辑控制器，每当一个URL，如要求如下：

I would like to route this logic through a controller, whenever a URL such as the following is requested:

www.mywebsite.com/resource/image/topbanner

控制器将查找 topbanner.png 和图像直接发送回客户端。

The controller will look up topbanner.png and send that image directly back to the client.

我见过这样的例子，你需要创建一个视图 - 我不想使用一个视图。我想只用控制器来完成这一切。

I've seen examples of this where you have to create a View - I don't want to use a View. I want to do it all with just the Controller.

这可能吗？

推荐答案

使用基地控制器文件的方法。

Use the base controllers File method.

public ActionResult Image(string id)
{
    var dir = Server.MapPath("/Images");
    var path = Path.Combine(dir, id + ".jpg");
    return base.File(path, "image/jpeg");
}

作为一个说明，这似乎是相当有效的。我做了一个测试，我请求的图像通过控制器（的http：//本地主机/ myController的/图像/ MYIMAGE ），并通过直接URL（ HTTP：//localhost/Images/MyImage.jpg ），结果是：

As a note, this seems to be fairly efficient. I did a test where I requested the image through the controller (http://localhost/MyController/Image/MyImage) and through the direct URL (http://localhost/Images/MyImage.jpg) and the results were:

• MVC：每张照片7.6毫秒


• 直接：每张照片6.7毫秒

• MVC: 7.6 milliseconds per photo
• Direct: 6.7 milliseconds per photo

请注意：这是一个请求的平均时间。一般是由本地计算机上使成千上万的请求计算，所以总计不应该包括网络延迟和带宽问题。

Note: this is the average time of a request. The average was calculated by making thousands of requests on the local machine, so the totals should not include network latency or bandwidth issues.

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