一个好用的C# HttpCookieHelper.cs类

 using System;  
using System.Collections.Generic;  
using System.Text;  
using System.Text.RegularExpressions;  
  
namespace DotNet.Utilities  
{  
     /// <summary>  
    /// Cookie操作帮助类  
    /// </summary>  
    public static class HttpCookieHelper  
    {  
        /// <summary>  
        /// 根据字符生成Cookie列表  
        /// </summary>  
        /// <param name="cookie">Cookie字符串</param>  
        /// <returns></returns>  
        public static List<CookieItem> GetCookieList(string cookie)  
        {  
            List<CookieItem> cookielist = new List<CookieItem>();  
            foreach (string item in cookie.Split(new string[] { ";", "," }, StringSplitOptions.RemoveEmptyEntries))  
            {  
                if (Regex.IsMatch(item, @"([\s\S]*?)=([\s\S]*?)$"))  
                {  
                    Match m = Regex.Match(item, @"([\s\S]*?)=([\s\S]*?)$");  
                    cookielist.Add(new CookieItem() { Key = m.Groups[1].Value, Value = m.Groups[2].Value });  
                }  
            }  
            return cookielist;  
        }  
  
        /// <summary>  
        /// 根据Key值得到Cookie值,Key不区分大小写  
        /// </summary>  
        /// <param name="Key">key</param>  
        /// <param name="cookie">字符串Cookie</param>  
        /// <returns></returns>  
        public static string GetCookieValue(string Key, string cookie)  
        {  
            foreach (CookieItem item in GetCookieList(cookie))  
            {  
                if (item.Key == Key)  
                    return item.Value;  
            }  
            return "";  
        }  
        /// <summary>  
        /// 格式化Cookie为标准格式  
        /// </summary>  
        /// <param name="key">Key值</param>  
        /// <param name="value">Value值</param>  
        /// <returns></returns>  
        public static string CookieFormat(string key, string value)  
        {  
            return string.Format("{0}={1};", key, value);  
        }  
    }  
  
    /// <summary>  
    /// Cookie对象  
    /// </summary>  
    public class CookieItem  
    {  
        /// <summary>  
        /// 键  
        /// </summary>  
        public string Key { get; set; }  
        /// <summary>  
        /// 值  
        /// </summary>  
        public string Value { get; set; }  
    }  
}