cookie! 怎么保存用户名 和怎么取出用户名

[huangdi_zao]

登录时候cookie! 怎么保存用户名 下次打开页面的时候怎么取出用户名？？？

[freewind0521]

//写入

HttpCookie cookie = new HttpCookie("yonghu");
                    cookie.Values["userId"] = strUserId;
                    cookie.Values["pwd"] = strPwd;
                    cookie.Expires = DateTime.Now.AddYears(1);
                    Response.Cookies.Add(cookie);

//读取

string[] cookieArray = cookies.AllKeys;
            for (int i = 0; i < cookieArray.Length; i++)
{
                oneCookie = cookies[cookieArray[i]];
if (oneCookie.Name == "yonghu"))
{
string strIdPwd = oneCookie.Value;
                    string[] arrayIdPwd = strIdPwd.Split('&');
                    string[] arrayUserId = arrayIdPwd[0].Split('=');
                    string[] arrayPwd = arrayIdPwd[1].Split('=');
string strUserId = "", strPwd = "";
strUserId = arrayUserId[1];
 strPwd = arrayPwd[1];
}

[freewind0521]

//写入

HttpCookie cookie = new HttpCookie("yonghu");
cookie.Values["userId"] = strUserId;
cookie.Values["pwd"] = strPwd;
cookie.Expires = DateTime.Now.AddYears(1);
Response.Cookies.Add(cookie);

//读取

string[] cookieArray = cookies.AllKeys;
for (int i = 0; i < cookieArray.Length; i++)
{
   oneCookie = cookies[cookieArray[i]];
   if (oneCookie.Name == "yonghu"))
   {
       string strIdPwd = oneCookie.Value;
       string[] arrayIdPwd = strIdPwd.Split('&');
       string[] arrayUserId = arrayIdPwd[0].Split('=');
       string[] arrayPwd = arrayIdPwd[1].Split('=');
       string strUserId = "", strPwd = "";
       strUserId = arrayUserId[1];
       strPwd = arrayPwd[1];
   }
}

[柳晛]

试用之前建议先检测客户端是否支持Cookies：ReQuest.Browser.Cookies

以前做的笔记（VB.NET版）：
(1)定义 Cookie 对象
Dim 对象名 As New HttpCookie("Cookie 名字")
例如：Dim MyCookie As New HttpCookie("MyBackGround") '定义一个名为 MyBackGround 的 Cookie 对象

(2)设置 Cookie 的值
对象名.Value = 值
例如：MyCookie.Value = DropDownList_选择背景.SelectedItem.Value '将用户所选背景所对应的图片文件名存入 Cookie

(3)将 Cookie 写到浏览器端
Response.Cookies.Add(Cookie 对象名)
例如：Response.Cookies.Add(MyCookie) '向 Cookies 集合中写入 Cookie （就是将服务器创建的 Cookies 写入浏览器端）

(4)将 Cookie 从客户端读出来
变量 = Request.Cookies("Cookie 名字") '获取 Cookie 对象
变量 = Request.Cookies("Cookie 名字").Value '获取 Cookie 值

(5)设置 Cookie文件 的存在时间。
Response.Cookies("Cookie 名字").Expires = #过期时间# ' #12/31/2007#
Response.Cookies("Cookie 名字").Expires = System.DateTime.MaxValue '永久保存

(6)设置 Cookie 的站点属性，防止其它站点访问
Response.Cookies("Cookie 名字").Domain = "URL"