.net操作cookies

1.创建Cookies方法 

if (Request.Cookies["Products"] == null)        //判断Products(cookies)是否存在
                {
                    HttpCookie oCookie = new HttpCookie("Products");
                    oCookie.Expires = DateTime.Now.AddHours(24);      //设置Products(cookies)过去时间
                    oCookie.Value = pro_id.ToString();
                    Response.Cookies.Add(oCookie);
                }
                else
                {
                    bool bExists = false;
                    char[] sep = { ',' };
                    HttpCookie oCookie = (HttpCookie)Request.Cookies["Products"];   //实例cookie
                    oCookie.Expires = DateTime.Now.AddHours(24);    //设置Products(cookies)过去时间
                    string sProdID = oCookie.Value.ToString();      //Products(cookies)包含的值
                    string[] arrCookie = sProdID.Split(sep);

                    for (int i = 0; i < arrCookie.Length; i++)
                    {
                        if (arrCookie[i].Trim() == pro_id.ToString().Trim())
                        {
                            bExists = true;
                        }
                    }
                    if (!bExists)
                    {
                        if (oCookie.Value.Length == 0)
                        {
                            oCookie.Value = pro_id.ToString();
                        }
                        else
                        {
                            oCookie.Value = oCookie.Value + "," + pro_id;
                        }
                    }
                    Response.Cookies.Add(oCookie);      //Products(cookies)添加进cookies
                }

2.清除cookies方法

HttpCookie cookie = Request.Cookies["cookieNmae"];
        cookie.Expires = DateTime.Today.AddDays(-1);

        //重要： 
        Response.Cookies.Add(cookie);

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