新建类 CustomSessionIDManager
???public class CustomSessionIDManager : SessionIDManager, ISessionIDManager ???{ ???????private SessionStateSection pConfig = null; ???????string ISessionIDManager.GetSessionID(HttpContext context) ???????{ ???????????if (pConfig == null) ???????????{ ???????????????Configuration cfg = ?????????????????WebConfigurationManager.OpenWebConfiguration(System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath); ???????????????pConfig = (SessionStateSection)cfg.GetSection("system.web/sessionState"); ???????????} ???????????string sid = base.GetSessionID(context);//默认从Cookie、UseUri 中获取 ???????????if (string.IsNullOrWhiteSpace(sid) ???????????????&& !string.IsNullOrWhiteSpace(context.Request.QueryString[pConfig.CookieName])) ???????????{ ???????????????var _sid = context.Request.QueryString[pConfig.CookieName];//从自定义查询字符中获取，也可以扩展从自定义Header中获取 ???????????????????????????????return sid; ???????????} ???????????return sid; ???????} ???}修改Web.Config
?<system.web> ???????<sessionState cookieName="_sid" sessionIDManagerType="命名空间.CustomSessionIDManager" />
自定义 Asp.Net SessionID 获取方式
原文地址：https://www.cnblogs.com/smartstar/p/9772830.html