<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="0">
HttpContext.Current.Response.Cache.SetExpires(System.DateTime.UtcNow.AddDays(-1));
HttpContext.Current.Response.Cache.SetValidUntilExpires(false);
HttpContext.Current.Response.Cache.SetRevalidation(System.Web.HttpCacheRevalidation.AllCaches);
HttpContext.Current.Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
HttpContext.Current.Response.Cache.SetNoStore();
原文：http://www.cnblogs.com/zwei1121/p/3958206.html