Cookies操作实例

1.CookiesHelper

 

using System;
using System.Collections.Generic;
using System.Web;

/// <summary>
///CookiesHelper 的摘要说明
/// </summary>
public class CookiesHelper
{
    public CookiesHelper()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    #region 获取Cookie

    /// <summary>
    /// 获得Cookie的值
    /// </summary>
    /// <param name="cookieName"></param>
    /// <returns></returns>
    public static string GetCookieValue(string cookieName)
    {
        return GetCookieValue(cookieName, null);
    }

    /// <summary>
    /// 获得Cookie的值
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string GetCookieValue(string cookieName, string key)
    {
        HttpRequest request = HttpContext.Current.Request;
        if (request != null)
            return GetCookieValue(request.Cookies[cookieName], key);
        return "";
    }

    /// <summary>
    /// 获得Cookie的子键值
    /// </summary>
    /// <param name="cookie"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string GetCookieValue(HttpCookie cookie, string key)
    {
        if (cookie != null)
        {
            if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                return cookie.Values[key];
            else
                return cookie.Value;
        }
        return "";
    }

    /// <summary>
    /// 获得Cookie
    /// </summary>
    /// <param name="cookieName"></param>
    /// <returns></returns>
    public static HttpCookie GetCookie(string cookieName)
    {
        HttpRequest request = HttpContext.Current.Request;
        if (request != null)
            return request.Cookies[cookieName];
        return null;
    }

    #endregion

    #region 删除Cookie

    /// <summary>
    /// 删除Cookie
    /// </summary>
    /// <param name="cookieName"></param>
    public static void RemoveCookie(string cookieName)
    {
        RemoveCookie(cookieName, null);
    }

    /// <summary>
    /// 删除Cookie的子键
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    public static void RemoveCookie(string cookieName, string key)
    {
        HttpResponse response = HttpContext.Current.Response;
        if (response != null)
        {
            HttpCookie cookie = response.Cookies[cookieName];
            if (cookie != null)
            {
                if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                    cookie.Values.Remove(key);
                else
                    response.Cookies.Remove(cookieName);
            }
        }
    }

    #endregion

    #region 设置/修改Cookie

    /// <summary>
    /// 设置Cookie子键的值
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    /// <param name="value"></param>
    public static void SetCookie(string cookieName, string key, string value)
    {
        SetCookie(cookieName, key, value, null);
    }

    /// <summary>
    /// 设置Cookie值
    /// </summary>
    /// <param name="key"></param>
    /// <param name="value"></param>
    public static void SetCookie(string key, string value)
    {
        SetCookie(key, null, value, null);
    }

    /// <summary>
    /// 设置Cookie值和过期时间
    /// </summary>
    /// <param name="key"></param>
    /// <param name="value"></param>
    /// <param name="expires"></param>
    public static void SetCookie(string key, string value, DateTime expires)
    {
        SetCookie(key, null, value, expires);
    }

    /// <summary>
    /// 设置Cookie过期时间
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="expires"></param>
    public static void SetCookie(string cookieName, DateTime expires)
    {
        SetCookie(cookieName, null, null, expires);
    }

    /// <summary>
    /// 设置Cookie
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    /// <param name="value"></param>
    /// <param name="expires"></param>
    public static void SetCookie(string cookieName, string key, string value, DateTime? expires)
    {
        HttpResponse response = HttpContext.Current.Response;
        if (response != null)
        {
            HttpCookie cookie = response.Cookies[cookieName];
            if (cookie != null)
            {
                if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                    cookie.Values.Set(key, value);
                else
                    if (!string.IsNullOrEmpty(value))
                        cookie.Value = value;
                if (expires != null)
                    cookie.Expires = expires.Value;
                response.SetCookie(cookie);
            }
        }

    }

    #endregion

    #region 添加Cookie

    /// <summary>
    /// 添加Cookie
    /// </summary>
    /// <param name="key"></param>
    /// <param name="value"></param>
    public static void AddCookie(string key, string value)
    {
        AddCookie(new HttpCookie(key, value));
    }

    /// <summary>
    /// 添加Cookie
    /// </summary>
    /// <param name="key"></param>
    /// <param name="value"></param>
    /// <param name="expires"></param>
    public static void AddCookie(string key, string value, DateTime expires)
    {
        HttpCookie cookie = new HttpCookie(key, value);
        cookie.Expires = expires;
        AddCookie(cookie);
    }

    /// <summary>
    /// 添加为Cookie.Values集合
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    /// <param name="value"></param>
    public static void AddCookie(string cookieName, string key, string value)
    {
        HttpCookie cookie = new HttpCookie(cookieName);
        cookie.Values.Add(key, value);
        AddCookie(cookie);
    }

    /// <summary>
    /// 添加为Cookie集合
    /// </summary>
    /// <param name="cookieName">Cookie名称</param>
    /// <param name="expires">过期时间</param>
    public static void AddCookie(string cookieName, DateTime expires)
    {
        HttpCookie cookie = new HttpCookie(cookieName);
        cookie.Expires = expires;
        AddCookie(cookie);
    }

    /// <summary>
    /// 添加为Cookie.Values集合
    /// </summary>
    /// <param name="cookieName"></param>
    /// <param name="key"></param>
    /// <param name="value"></param>
    /// <param name="expires"></param>
    public static void AddCookie(string cookieName, string key, string value, DateTime expires)
    {
        HttpCookie cookie = new HttpCookie(cookieName);
        cookie.Expires = expires;
        cookie.Values.Add(key, value);
        AddCookie(cookie);
    }

    /// <summary>
    /// 添加Cookie
    /// </summary>
    /// <param name="cookie"></param>
    public static void AddCookie(HttpCookie cookie)
    {
        HttpResponse response = HttpContext.Current.Response;
        if (response != null)
        {
            //指定客户端脚本是否可以访问[默认为false]
            cookie.HttpOnly = true;
            //指定统一的Path，比便能通存通取
            cookie.Path = "/";
            //设置跨域,这样在其它二级域名下就都可以访问到了
            //cookie.Domain = "chinesecoo.com";
            response.AppendCookie(cookie);
        }
    }

    #endregion

}

 

 

2.后台页面

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            HttpCookie Cookie = CookiesHelper.GetCookie("cUserInfo");
            if (Cookie != null)
            {
                this.txtID.Text = Cookie.Values["cuName"].ToString();
                this.txtPWD.Attributes["value"] = Cookie.Values["cuPass"];
            }
        }

// <summary>
    /// 设置Cookie
    /// </summary>
    private void SetCookie()
    {
        HttpCookie Cookie = CookiesHelper.GetCookie("cUserInfo");
        Cookie = new HttpCookie("cUserInfo");
        Cookie.Values.Add("cuName", this.txtID.Text);
        Cookie.Values.Add("cuPass", this.txtPWD.Text );
        if (this.chkSave.Checked == true)
        {
            //七天之后过期
            Cookie.Expires = DateTime.Now.AddDays(7);
        }
        else
        {
            //网页显示完了就过期
            Cookie.Expires = DateTime.Now.AddDays(-1);
        }
        CookiesHelper.AddCookie(Cookie);
    }