很多时候用到Session都比较厌烦，主要还因为很容易就丢失了！
解决的方法有：
1、设置Session时间；
在Global.ascx文件中的设置时间： Session.Timeout = 600;
2、放在服务器里：
web.config中配置 <sessionstate mode="stateServer">后，在服务中启动 asp.net state service (asp.net状态服务)
除了以上两种方法外，就是Session + Cookies ！双重保险。废话不多说，直接看代码就知道了：
用户登录实例
public static bool Islogin(string Uname, string Pwd, bool writecookie)
{
bool brt = false;
com.csfqw.passport.API wsLogin = new NT.Data.SqlServer.com.csfqw.passport.API();
DataSet ds = wsLogin.IsLogin(Uname, Pwd);
if (ds.Tables[0].Rows.Count > 0)
{
DataRow dr = ds.Tables[0].Rows[0];
System.Web.HttpContext.Current.Session["username"] = dr["username"].ToString();
brt = true;
if (writecookie)
{
NTCookies cookie = new NTCookies("NetUser");
cookie.WriteCookie("username", Uname);
cookie.SetExpires(60);
cookie.Domain = "csfqw.com";
cookie.RespnseCookies();
brt = true;
}
}
return brt;
}
用户退出实例
public static void UserLoginOut()
{
//NTCookies cookie = new NTCookies("NetUser");
//cookie.ClearCookies();
//HttpContext.Current.Session.Remove("username");
///退出用户
HttpCookie cookie =System.Web.HttpContext.Current.Request.Cookies["NetUser"];
if (cookie != null && cookie["username"] != null)
{
cookie.Expires = DateTime.Now.AddDays(-1.0d);
cookie.Domain = "csfqw.com";
System.Web.HttpContext.Current.Response.AppendCookie(cookie);
}
///撤销专家
HttpCookie expertcookie = System.Web.HttpContext.Current.Request.Cookies["IsExpert"];
if (expertcookie != null && expertcookie["Expert"] != null)
{
expertcookie.Expires = DateTime.Now.AddDays(-1.0d);
expertcookie.Domain = "csfqw.com";
System.Web.HttpContext.Current.Response.AppendCookie(expertcookie);
}
HttpContext.Current.Session.Remove("username");
HttpContext.Current.Session.Remove("Expert");
}