虚拟路径提供禁用缓存？ [英] Virtual Path Provider disable caching?

问题描述

我有一个虚拟路径提供。问题是它的缓存我的文件。每当我手动编辑引用VPP不会在新文件中拉ASPX文件之一，它继续进行，直到我重新启动该网站重用旧文件。

I have a virtual path provider. Problem is its caching my files. Whenever I manually edit one of the aspx files it references the VPP doesn't pull in the new file, it continues to reuse the old file until I restart the site.

我在我的VirtualPathProvider类甚至过度骑着GetCacheDependency（）：

I've even over-rode the GetCacheDependency() in my VirtualPathProvider class:

    public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
    {
        return null;
    }

想法？

Ideas?

推荐答案

返回一个空实质上是告诉你没有任何依赖ASP.NET - ASP.NET，因此不会重新加载项

Returning a null is essentially telling ASP.NET that you do not have any dependency - hence ASP.NET will not reload the item.

您需要的是返回一个有效的依赖性如

What you need is to return a valid dependency e.g.

 public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
    {
        return new CacheDependency(getPhysicalFileName(virtualPath));
    }

有一个更正确的做法是，以确保您只处理自己的缓存依赖（这是一个示意性的例子）：

A more correct approach is to make sure that you only handle your own cache dependencies (this is a schematic example) :

 public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
    {
        if (isMyVirtualPath(virtualPath))
            return new CacheDependency(getPhysicalFileName(virtualPath));
        else
            return new Previous.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart);
    }

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