IIS 7 强制刷新图像 [英] IIS 7 Force Fresh Images

问题描述

如何强制 IIS 7不缓存特定页面的图像?

How do I force IIS 7 to not cache images for a particular page?

推荐答案

在 IIS7 中，您可以在 web.config 中以声明方式或以编程方式执行此操作.

In IIS7, you can do this either declaratively in your web.config, or programmatically.

<location path="YourPath">
  <system.webServer>
    <staticContent>
      <clientCache cacheControlMode="DisableCache" />
    </staticContent>
  </system.webServer>
</location>

编程解决方案需要一个简单的 HttpModule，它已注册为在集成模式下运行所有​​请求，您可以在其中查找您关心的 URL.然后调用:

The programmatic solution requires a simple HttpModule that's registered to run for all requests in Integrated mode, where you look for the URLs that you're concerned about. Then call:

context.Response.Cache.SetCacheability(HttpCacheability.NoCache);

FWIW，您可能需要考虑仅禁用客户端缓存，同时启用服务器端缓存，方法是使用 HttpCacheability.ServerAndNoCache.此外，如果您在图像名称上添加查询字符串，您将阻止 http.sys 进行服务器端缓存.

FWIW, you may want to consider disabling client-side caching only, while enabling server-side caching, by using HttpCacheability.ServerAndNoCache. Also, if you add a query string on the image names, you will prevent server-side caching by http.sys.

如果有帮助，我会在我的书中详细介绍这些技术:Ultra-Fast ASP.NET.

In case it helps, I cover techniques like these in detail in my book: Ultra-Fast ASP.NET.

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