登录的时候先取cookie,取到就加1.然后保存。
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if
(Request.Cookies[
"loginCount"
] ==
null
)
{
HttpCookie c=
new
HttpCookie(
"loginCount"
); ;
Response.Cookies[
"loginCount"
].Value =
"1"
;
Response.Cookies[
"loginCount"
].Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(c);
}
else
{
int
count = Convert.ToInt32(Request.Cookies[
"loginCount"
].Value) + 1;
Response.Cookies[
"loginCount"
].Value = count.ToString();
}
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if
(Request.Cookies[
"userCookie"
] ==
null
)
{
HttpCookie userCookie =
new
HttpCookie(
"userCookie"
);
userCookie.Values[
"userName"
] = userInfo.UserName.ToString();
userCookie.Values[
"lastVist"
] = DateTime.Now.ToString();
userCookie.Values[
"count"
] =
"1"
;
userCookie.Expires = DateTime.Now.AddDays(30);
Response.Cookies.Add(userCookie);
}
else
{
int
counter = Convert.ToInt32(Request.Cookies[
"userCookie"
][
"count"
]) + 1;
HttpCookie userCookie =
new
HttpCookie(
"userCookie"
);
userCookie.Values[
"userName"
] = userInfo.UserName.ToString();
userCookie.Values[
"lastVist"
] = DateTime.Now.ToString();
userCookie.Values[
"count"
] = counter.ToString();
userCookie.Expires = DateTime.Now.AddDays(30);
Response.Cookies.Add(userCookie);
}
在另一个页面取出来
//读取Cookie
string
nameCookie = Request.Cookies[
"userCookie"
][
"userName"
];
Response.Write(
"用户名："
+ nameCookie);
string
timeCookie = Request.Cookies[
"userCookie"
][
"lastVist"
];
Response.Write(
" <br>上传访问时间："
+ timeCookie);
string
countCookie = Request.Cookies[
"userCookie"
][
"count"
];
Response.Write(
" <br>访问次数："
+ countCookie);
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防止同一账户重复登录
放在登陆成功的地方：
string key = TextBox1.Text; //用户名文本框设为cache关键字
string uer = Convert.ToString(Cache[key]); //读取cache中用户相应的值
if (uer == null || uer == String.Empty)//判断cache中是否有用户的信息，如果没有相关的值，说明用户未登陆
{
//定义cache过期时间
TimeSpan SessTimeout = new TimeSpan(0, 0, System.Web.HttpContext.Current.Session.Timeout, 0, 0);
//第一次登陆的时候插入一个用户相关的cache值，
HttpContext.Current.Cache.Insert(key, key, null, DateTime.MaxValue, SessTimeout, System.Web.Caching.CacheItemPriority.NotRemovable, null);
Session["ADMINID"] = TextBox1.Text;
Response.Redirect("main.aspx");
}
else
{
//重复登陆 Response.Write("<script>alert('您的账号已经登陆!');window.location='login.aspx';</script>");
}
本文转自曾祥展博客园博客，原文链接：http://www.cnblogs.com/zengxiangzhan/archive/2009/12/23/1630870.html，如需转载请自行联系原作者
