C#中Cookies的存取

c#中cookies的存取操作
c#中cookies的存取
cookies的创建:

在客户端创建一个username的cookies,其值为gjy,有效期为1天.
方法1:
Response.Cookies["username"].Value="zxf";
Response.Cookies["username"].Expires=DateTime.Now.AddDays(1);

方法2:
System.Web.HttpCookie newcookie=new HttpCookie("username");
newcookie.Value="gjy";
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"]="zxf";
newcookie.Values["password"]="111";
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