private void OpenJump(int Sgrade, int Sclass) { LearnSite.BLL.Room rm = new LearnSite.BLL.Room(); string Cid = rm.IsRopenRcid(Sgrade, Sclass); if (string.IsNullOrEmpty(Cid)) { Response.Redirect("~/Student/myinfo.aspx", false);//如果返回Cid为空 } else { string myurl = "~/Student/showcourse.aspx?Cid=" + Cid;//快速模式为真,且返回Cid不为空 Response.Redirect(myurl, true); } }