清除部分输出缓存

Question

I have a page that has controls that are output caches (partial output caching). These are setup like this:

[PartialCaching(86400, null, null, "campaign.whatwhere", true)]
public partial class controls_LatestEnquiriesListCached : System.Web.UI.UserControl
{

...

With

public override string GetVaryByCustomString(HttpContext context, string custom)
{
    if (custom == "campaign.whatwhere")
    {
        return (CampaignManager.CurrentCampaign.DefaultWorkTypeId ?? 0).ToString() + (CampaignManager.CurrentCampaign.DefaultEnquiryAreaId ?? 0).ToString();
    }
    return base.GetVaryByCustomString(context, custom);
}

In Global.asax

How can I setup so I can clear this output cache on a specific page?

Is it possible to setup like MyPageWithCachedControl.aspx?ClearCache=true ???

Answer 1

Use HTTPResponse.RemoveOutputCacheItem(pathofpage) to clear the cache of a particular page.

For example:

private void Button1_Click(object sender, System.EventArgs e)
{
   HttpResponse.RemoveOutputCacheItem("/form1.aspx");
}

Answer 2

You can create an aspx page that does nothing but clears cache. You can take the querystring parameter and have it delete by cache key.

Or you can try to find and ASP.NET cache manager.

Answer 3

您应该使用HttpResponse.RemoveOutputCacheItem(path)清除输出缓存，其中path是用户控件的虚拟绝对路径，如https://stackoverflow.com/a/37167/30594中所指定