参考代码如下：

//如果请求的Cookie对象为空

if (Request.Cookies["userCookie"] == null)

{

//创建一个Cookie对象

HttpCookie userCookie = new HttpCookie("userCookie");

//给对象赋值

userCookie.Values["userName"] =

userInfo.UserName.ToString();

userCookie.Values["lastVist"] =

DateTime.Now.ToString();

userCookie.Values["count"] = "1";

//设置对象的过期时间

userCookie.Expires = DateTime.Now.AddDays(30);

//添加到Cookies集合

Response.Cookies.Add(userCookie);

}

//不为空的情况

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);

}