c#和net存取cookies操作示例

cookies的创建:

在客户端创建一个username的cookies,其值为oneday,有效期为1天.

方法1:

response.cookies["username"].value="admin";
response.cookies["username"].expires=datetime.now.adddays(1);

方法2:

system.web.httpcookie newcookie=new httpcookie("username");
newcookie.value="oneday";
newcookie.expires=datetime.now.adddays(1);
response.appendcookie(newcookie);

创建带有子键的cookies:

system.web.httpcookie newcookie=new httpcookie("user");
newcookie.values["username"]="admin";
newcookie.values["password"]="admin";
newcookie.expires=datetime.now.adddays(1);
response.appendcookie(newcookie);

cookies的读取:

无子键读取:

if(request.cookies["username"]!=null)
{
response.write(server.htmlencode(request.cookies["username"].value));
}

有子键读取:

if(request.cookies["user"]!=null)
{
response.write(server.htmlencode(request.cookies["user"]["username"].value));
response.write(server.htmlencode(request.cookies["user"]["password"].value));

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;

public class cookie
{
    /// <summary>
    /// cookies赋值
    /// </summary>
    /// <param name="strname">主键</param>
    /// <param name="strvalue">键值</param>
    /// <param name="strday">有效天数</param>
    /// <returns></returns>
    public bool setcookie(string strname, string strvalue, int strday)
    {
        try
        {
            httpcookie cookie = new httpcookie(strname);
            //cookie.domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
            cookie.expires = datetime.now.adddays(strday);
            cookie.value = strvalue;
            system.web.httpcontext.current.response.cookies.add(cookie);
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 读取cookies
    /// </summary>
    /// <param name="strname">主键</param>
    /// <returns></returns>
    public string getcookie(string strname)
    {
        httpcookie cookie = system.web.httpcontext.current.request.cookies[strname];
        if (cookie != null)
        {
            return cookie.value.tostring();
        }
        else
        {
            return null;
        }
    }

    /// <summary>
    /// 删除cookies
    /// </summary>
    /// <param name="strname">主键</param>
    /// <returns></returns>
    public bool delcookie(string strname)
    {
        try
        {
            httpcookie cookie = new httpcookie(strname);
            //cookie.domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
            cookie.expires = datetime.now.adddays(-1);
            system.web.httpcontext.current.response.cookies.add(cookie);
            return true;
        }
        catch
        {
            return false;
        }
    }
}

示例：

cookie cookie = new cookie();
cookie.setcookie("name", "aaa",1);//赋值
cookie.getcookie("name");//取值
cookie.delcookie("name");//删除

注意:当cookie存中文出现乱码,则在存放时给中文编码,如cookie.setcookie("name", server.urlencode("aaa"),1),读取时解码即可

另外：只要不给cookie设置过期时间,cookie在浏览器关闭的时候自动失效

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;

public class cookie
{
    /// <summary>
    /// cookies赋值
    /// </summary>
    /// <param name="strname">主键</param>
    /// <param name="strvalue">键值</param>
    /// <param name="strday">有效天数</param>
    /// <returns></returns>
    public bool setcookie(string strname, string strvalue, int strday)
    {
        try
        {
            httpcookie cookie = new httpcookie(strname);
            //cookie.domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
            cookie.expires = datetime.now.adddays(strday);
            cookie.value = strvalue;
            system.web.httpcontext.current.response.cookies.add(cookie);
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 读取cookies
    /// </summary>
    /// <param name="strname">主键</param>
    /// <returns></returns>
    public string getcookie(string strname)
    {
        httpcookie cookie = system.web.httpcontext.current.request.cookies[strname];
        if (cookie != null)
        {
            return cookie.value.tostring();
        }
        else
        {
            return null;
        }
    }

    /// <summary>
    /// 删除cookies
    /// </summary>
    /// <param name="strname">主键</param>
    /// <returns></returns>
    public bool delcookie(string strname)
    {
        try
        {
            httpcookie cookie = new httpcookie(strname);
            //cookie.domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
            cookie.expires = datetime.now.adddays(-1);
            system.web.httpcontext.current.response.cookies.add(cookie);
            return true;
        }
        catch
        {
            return false;
        }
    }
}

示例：

cookie cookie = new cookie();
cookie.setcookie("name", "aaa",1);//赋值
cookie.getcookie("name");//取值
cookie.delcookie("name");//删除

注意:当cookie存中文出现乱码,则在存放时给中文编码,如cookie.setcookie("name", server.urlencode("aaa"),1),读取时解码即可

另外：只要不给cookie设置过期时间,cookie在浏览器关闭的时候自动失效