缓存对html.action的调用

ASP.NET使用的缓存系统存在于MVC之外,因此仅适用于URL,VaryByParam仅适用于QueryString参数。

我贴了一些密码 OutputCache behavior in ASP.NET MVC 3 这将使您能够使用基于参数的缓存操作。这个特定的例子我添加了一个“忽略”参数,它实际上会忽略一个路由字段,但是您只需删除它,就可以了。

我想我可以把它贴在这里而不忽略

public class ActionOutputCacheAttribute : ActionFilterAttribute {
    public ActionOutputCacheAttribute(int cacheDuration) {
        this.cacheDuration = cacheDuration;
    }

    private int cacheDuration;
    private string cacheKey;

    public override void OnActionExecuting(ActionExecutingContext filterContext) {
        string url = filterContext.HttpContext.Request.Url.PathAndQuery;
        this.cacheKey = ComputeCacheKey(filterContext);

        if (filterContext.HttpContext.Cache[this.cacheKey] != null) {
            //Setting the result prevents the action itself to be executed
            filterContext.Result =
            (ActionResult)filterContext.HttpContext.Cache[this.cacheKey];
        }

        base.OnActionExecuting(filterContext);
    }

    public override void OnActionExecuted(ActionExecutedContext filterContext) {
        //Add the ActionResult to cache 
        filterContext.HttpContext.Cache.Add(this.cacheKey, filterContext.Result,null, DateTime.Now.AddSeconds(cacheDuration),
          System.Web.Caching.Cache.NoSlidingExpiration, CacheItemPriority.Normal, null);

        //Add a value in order to know the last time it was cached.
        filterContext.Controller.ViewData["CachedStamp"] = DateTime.Now;

        base.OnActionExecuted(filterContext);
    }

    private string ComputeCacheKey(ActionExecutingContext filterContext) {
        var keyBuilder = new StringBuilder();
        keyBuilder.Append(filterContext.ActionDescriptor.ControllerDescriptor.ControllerName);
        keyBuilder.Append(filterContext.ActionDescriptor.ActionName);

        foreach (var pair in filterContext.RouteData.Values) {
            if(pair.Value != null)
                keyBuilder.AppendFormat("rd{0}_{1}_", pair.Key.GetHashCode(), pair.Value.GetHashCode());
        }
        return keyBuilder.ToString();
    }
}

上面的代码是对 http://blog.stevensanderson.com/2008/10/15/partial-output-caching-in-aspnet-mvc/