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c#和net存取cookies操作示例

时间：2021-07-12 08:15 编辑：来源：阅读：
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摘要：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:

[u]复制代码[/u] 代码如下:

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:

[u]复制代码[/u] 代码如下:

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:

[u]复制代码[/u] 代码如下:

if(Request.Cookies["username"]!=null)
{
Response.Write(Server.HtmlEncode(Request.Cookies["username"].Value));
}

有子键读取:

[u]复制代码[/u] 代码如下:

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：

[u]复制代码[/u] 代码如下:

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

[u]复制代码[/u] 代码如下:

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：

[u]复制代码[/u] 代码如下:

Cookie Cookie = new Cookie();
Cookie.setCookie("name", "aaa",1);//赋值
Cookie.getCookie("name");//取值
Cookie.delCookie("name");//删除

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