c# asp.net cookies class（cookies操作类）

 

using System;   

using System.Collections.Generic;   

using System.Linq;   

using System.Web;   

using System.Web.Security;   

using System.Web.UI;   

using System.Web.UI.HtmlControls;   

using System.Web.UI.WebControls;   

using System.Data;   

using System.Configuration;   

  

namespace cookiescontrol  

{   

/// <summary>   

/// Cookie操作类   

/// </summary>   

public class Cookie   

{   

/// <summary>   

/// 保存一个Cookie   

/// </summary>   

/// <param name="CookieName">Cookie名称</param>   

/// <param name="CookieValue">Cookie值</param>   

/// <param name="CookieTime">Cookie过期时间(小时),0为关闭页面失效</param>   

public static void SaveCookie(string CookieName, string CookieValue, double CookieTime)   

{   

HttpCookie myCookie = new HttpCookie(CookieName);   

DateTime now = DateTime.Now;   

myCookie.Value = CookieValue;   

  

if (CookieTime != 0)   

{   

//有两种方法，第一方法设置Cookie时间的话，关闭浏览器不会自动清除Cookie   

//第二方法不设置Cookie时间的话，关闭浏览器会自动清除Cookie ,但是有效期   

//多久还未得到证实。   

myCookie.Expires = now.AddDays(CookieTime);   

if (HttpContext.Current.Response.Cookies[CookieName] != null)   

HttpContext.Current.Response.Cookies.Remove(CookieName);   

  

HttpContext.Current.Response.Cookies.Add(myCookie);   

}   

else   

{   

if (HttpContext.Current.Response.Cookies[CookieName] != null)   

HttpContext.Current.Response.Cookies.Remove(CookieName);   

  

HttpContext.Current.Response.Cookies.Add(myCookie);   

}   

}   

/// <summary>   

/// 取得CookieValue   

/// </summary>   

/// <param name="CookieName">Cookie名称</param>   

/// <returns>Cookie的值</returns>   

public static string GetCookie(string CookieName)   

{   

HttpCookie myCookie = new HttpCookie(CookieName);   

myCookie = HttpContext.Current.Request.Cookies[CookieName];   

  

if (myCookie != null)   

return myCookie.Value;   

else   

return null;   

}   

/// <summary>   

/// 清除CookieValue   

/// </summary>   

/// <param name="CookieName">Cookie名称</param>   

public static void ClearCookie(string CookieName)   

{   

HttpCookie myCookie = new HttpCookie(CookieName);   

DateTime now = DateTime.Now;   

  

myCookie.Expires = now.AddYears(-2);   

  

HttpContext.Current.Response.Cookies.Add(myCookie);   

}   

}   

}