复制代码 代码如下:

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 Jhgl.Smart

{

/// <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);

}

}

}