ASP.NET(MVC)服务图像

public FileStreamResult GenericFetchImage(string RouteValueRefToImage)
{
    // Create a new memory stream object
    MemoryStream ms = new MemoryStream();

    // Go get image from file location
    ms = GetImageAndPutIntoMemoryStream(RouteValueRefToImage);

    // return the output as a file
    return new FileStreamResult(ms,"image/jpeg");
 }

之前( Can an ASP.Net MVC controller return an Image?)也提出了一个类似的问题,并且看起来直接用行动提供图像的性能影响非常小.正如所接受的答案所指出的那样,差异似乎是毫秒级(在该测试案例中,约为13％).您可以在本地重新运行测试,看看您的硬件有何不同.

关于你是否应该使用它的问题的最佳答案是从这个answer到(另一个)类似的问题(强调我的)：

DO worry about the following: you will need to re-implement a caching strategy on the server,since IIS manages that for static files requested directly. You will also need to make sure you manage your client-side caching with the correct headers included in the response. Ultimately,just ask yourself if re-inventing a method of serving static files from a server is something that serves your application’s needs.

要解决您提供的具体问题：

>

Apply security checks

您可以使用IIS 7 integrated pipeline执行此操作.文档中的相关位：

Allowing services provided by both native and managed modules to apply to all requests,regardless of handler. For example,managed Forms Authentication can be used for all content,including ASP pages,CGIs,and static files.

>

Standardised method of serving files based on route values

如果我正确地阅读文档,您可以在管道中尽早插入模块以重新编写传入的URL以直接指向静态资源,并让IIS从那里处理请求. (为了完整起见,还有关于将法律路线映射到法师的相关问题：How do I route images using ASP.Net MVC routing?)

Empowering ASP.NET components to provide functionality that was previously unavailable to them due to their placement in the server pipeline. For example,a managed module providing request rewriting functionality can rewrite the request prior to any server processing,including authentication.

还有一些非常强大的URL rewrite features,它带有或多或少的开箱即用的IIS.
>

Returning modified images (if requested) e.g. different dimentions (ok this would only be used sparingly so don’t relate this to the performance question above).

看起来0700已经可用于IIS了.不确定这是否会落在代码服务图像之下,但我猜它可能.
>

Perform business logic before allowing access to the resource

如果你正在执行业务逻辑来生成所述资源(如chart)或者你提到的验证码图像那么是的,你基本上别无选择,只能这样做.