try            {                SPSecurity.RunWithElevatedPrivileges(delegate()      //用此方法模拟管理员账户运行此事件处理程序                {                    SPWeb web = SPContext.Current.Web;                    //此时用户为sharepoint\system                    //Response.Write("用户为：" + web.CurrentUser);                    web.AllowUnsafeUpdates = true;                    //获取到要模拟的用户的token                        SPUser user = web.EnsureUser("veekee\\user1");                    SPUserToken token = user.UserToken;                    //利用用户Token构造新的Site对象                    SPSite siteWithUser = new SPSite(web.Url, token);                    SPWeb webWidthUser = siteWithUser.RootWeb;                    //此时用户为veekee\user1                     //Response.Write("用户为：" + webWidthUser.CurrentUser);                    webWidthUser.AllowUnsafeUpdates = true;                    //利用veekee\user1 用户来添加纪录                    SPList list = webWidthUser.Lists["test1"];                    SPListItem item = list.AddItem();                    item["Title"] = "11";                    item.Update();                    webWidthUser.Dispose();                    siteWithUser.Dispose();                    web.Dispose();                });            }            catch (Exception ex)            {                throw ex;            }