C# 自定义cookie封装类，简化Cookie操作

封装了常用的cookie操作，包括读取cookie、写入cookie、设置cookie过期时间等等。

using System;
using System.Web;
namespace DotNet.Utilities
{
public class CookieHelper
{
/// <summary>
/// 清除指定Cookie
/// </summary>
/// <param name="cookiename">cookiename</param>
public static void ClearCookie(string cookiename)
{
HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
if (cookie != null)
{
cookie.Expires = DateTime.Now.AddYears(-3);
HttpContext.Current.Response.Cookies.Add(cookie);
}
}
/// <summary>
/// 获取指定Cookie值
/// </summary>
/// <param name="cookiename">cookiename</param>
/// <returns></returns>
public static string GetCookieValue(string cookiename)
{
HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
string str = string.Empty;
if (cookie != null)
{
str = cookie.Value;
}
return str;
}
/// <summary>
/// 添加一个Cookie（24小时过期）
/// </summary>
/// <param name="cookiename"></param>
/// <param name="cookievalue"></param>
public static void SetCookie(string cookiename, string cookievalue)
{
SetCookie(cookiename, cookievalue, DateTime.Now.AddDays(1.0));
}
/// <summary>
/// 添加一个Cookie
/// </summary>
/// <param name="cookiename">cookie名</param>
/// <param name="cookievalue">cookie值</param>
/// <param name="expires">过期时间 DateTime</param>
public static void SetCookie(string cookiename, string cookievalue, DateTime expires)
{
HttpCookie cookie = new HttpCookie(cookiename)
{
Value = cookievalue,
Expires = expires
};
HttpContext.Current.Response.Cookies.Add(cookie);
}
}
}