最近在做一个通过HttpWebRequest来实现登陆和自动发信息的小软件，虽然还没有实现，但是今天从一个老外的网站上看到了一个获取CookieContainer很好的方法，拿出来共享一下，这是我看到过代码最少而且很不错的了。
1 
using System; 2 using System.Runtime.InteropServices; 3 using System.Text; 4 using System.Net; 5 6 namespace NExplus.NSiter 7 
{ 8
/**//// <summary> 9
/// 获取Cookie的方法类。10
/// </summary>11 public class CookieManger12 { 13 /**//// <summary>14 /// 通过COM来获取Cookie数据。15 /// </summary>16 /// <param name="url">当前网址。</param>17 /// <param name="cookieName">CookieName.</param>18 /// <param name="cookieData">用于保存Cookie Data的<see cref="StringBuilder"/>实例。</param>19 /// <param name="size">Cookie大小。</param>20 /// <returns>如果成功则返回<c>true</c>,否则返回<c>false</c>。</returns>21 [DllImport("wininet.dll", SetLastError = true)]22 public static extern bool InternetGetCookie(23 string url, string cookieName,24 StringBuilder cookieData, ref int size);25 /**//// <summary>26 /// 获取当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。27 /// </summary>28 /// <param name="uri">当前<see cref="Uri"/>地址。</param>29 /// <returns>当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。</returns>30 public static CookieContainer GetUriCookieContainer(Uri uri) { 31 CookieContainer cookies = null;3233 // 定义Cookie数据的大小。34 int datasize = 256;35 StringBuilder cookieData = new StringBuilder(datasize);3637 if (!InternetGetCookie(uri.ToString(), null, cookieData,38 ref datasize)) { 39 if (datasize < 0)40 return null;4142 // 确信有足够大的空间来容纳Cookie数据。43 cookieData = new StringBuilder(datasize);44 if (!InternetGetCookie(uri.ToString(), null, cookieData,45 ref datasize))46 return null;47 }484950 if (cookieData.Length > 0) { 51 cookies = new CookieContainer();52 cookies.SetCookies(uri, cookieData.ToString().Replace(';', ','));53 }54 return cookies;55 }5657 }58
}
using System; 2 using System.Runtime.InteropServices; 3 using System.Text; 4 using System.Net; 5 6 namespace NExplus.NSiter 7 { 8 /**//// <summary> 9 /// 获取Cookie的方法类。10 /// </summary>11 public class CookieManger12 { 13 /**//// <summary>14 /// 通过COM来获取Cookie数据。15 /// </summary>16 /// <param name="url">当前网址。</param>17 /// <param name="cookieName">CookieName.</param>18 /// <param name="cookieData">用于保存Cookie Data的<see cref="StringBuilder"/>实例。</param>19 /// <param name="size">Cookie大小。</param>20 /// <returns>如果成功则返回<c>true</c>,否则返回<c>false</c>。</returns>21 [DllImport("wininet.dll", SetLastError = true)]22 public static extern bool InternetGetCookie(23 string url, string cookieName,24 StringBuilder cookieData, ref int size);25 /**//// <summary>26 /// 获取当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。27 /// </summary>28 /// <param name="uri">当前<see cref="Uri"/>地址。</param>29 /// <returns>当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。</returns>30 public static CookieContainer GetUriCookieContainer(Uri uri) { 31 CookieContainer cookies = null;3233 // 定义Cookie数据的大小。34 int datasize = 256;35 StringBuilder cookieData = new StringBuilder(datasize);3637 if (!InternetGetCookie(uri.ToString(), null, cookieData,38 ref datasize)) { 39 if (datasize < 0)40 return null;4142 // 确信有足够大的空间来容纳Cookie数据。43 cookieData = new StringBuilder(datasize);44 if (!InternetGetCookie(uri.ToString(), null, cookieData,45 ref datasize))46 return null;47 }484950 if (cookieData.Length > 0) { 51 cookies = new CookieContainer();52 cookies.SetCookies(uri, cookieData.ToString().Replace(';', ','));53 }54 return cookies;55 }5657 }58} 是不是相当简单阿，希望对大家有一点用处。