C#设置Cookies .

//-----------------------------载入
if(!IsPostBack)
{

HttpCookie cookie = Request.Cookies["userinfo1"];
cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
for (int i = 0; i < 5; i++)
{
cookie.Values["BB" + i.ToString()] = i.ToString();
Response.Cookies.Add(cookie);
}

}

//**************写入
HttpCookie cookie = new HttpCookie("userinfo1");
cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
for (int i = 0; i < 10; i++)
{

cookie.Values["U" +i.ToString()] = i.ToString();
Response.Cookies.Add(cookie);
}

//**************---------------读取
//读取 Cookie 集合
for (int i = 0; i < Request.Cookies.Count; i++)
{
if (Request.Cookies.AllKeys[i] == "userinfo1")
{

HttpCookie cookies = Request.Cookies["userInfo1"];
Response.Write("name=" + cookies.Name + "<br/>");
//Response.Write("name=" + cookies.Value + "<br/>");

if (cookies.HasKeys)//是否有子键
{
System.Collections.Specialized.NameValueCollection NameColl = cookies.Values;
for (int j = 0; j < NameColl.Count; j++)
{

Response.Write("子键名=" + NameColl.AllKeys[j] + "<br/>");
Response.Write("子键值=" + NameColl[j] + "<br/>");
}

}
else
{
Response.Write("value=" + cookies.Value + "<br/>");
}
}

}

//***********************删除
HttpCookie acookie = Request.Cookies["userinfo1"];
acookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
if (acookie.HasKeys)//是否有子键
{
System.Collections.Specialized.NameValueCollection NameColl = acookie.Values;
for (int j = 0 ; j < NameColl.Count; j++)
{
if (NameColl.AllKeys[j] == "U8")
{
acookie.Values.Remove(NameColl.AllKeys[j]);
Response.Cookies.Add(acookie);
}
}
}

//***************************追加
HttpCookie cookie = Request.Cookies["userinfo1"];
cookie.Expires = System.DateTime.Now.AddMinutes(20);//设置过期时间
for (int i = 0; i < 5; i++)
{
cookie.Values["K" + i.ToString()] = i.ToString();
Response.Cookies.Add(cookie);
}