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using System;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Net;
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namespace NExplus.NSiter
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{
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/// <summary>
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/// 获取Cookie的方法类。
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/// </summary>
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public class CookieManger
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{
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/// <summary>
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/// 通过COM来获取Cookie数据。
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/// </summary>
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/// <param name="url">当前网址。</param>
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/// <param name="cookieName">CookieName.</param>
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/// <param name="cookieData">用于保存Cookie Data的<see cref="StringBuilder"/>实例。</param>
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/// <param name="size">Cookie大小。</param>
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/// <returns>如果成功则返回<c>true</c>,否则返回<c>false</c>。</returns>
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[DllImport("wininet.dll", SetLastError = true)]
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public static extern bool InternetGetCookie(
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string url, string cookieName,
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StringBuilder cookieData, ref int size);
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/// <summary>
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/// 获取当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。
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/// </summary>
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/// <param name="uri">当前<see cref="Uri"/>地址。</param>
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/// <returns>当前<see cref="Uri"/>的<see cref="CookieContainer"/>实例。</returns>
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public static CookieContainer GetUriCookieContainer(Uri uri) {
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CookieContainer cookies = null;
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// 定义Cookie数据的大小。
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int datasize = 256;
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StringBuilder cookieData = new StringBuilder(datasize);
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if (!InternetGetCookie(uri.ToString(), null, cookieData,
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ref datasize)) {
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if (datasize < 0)
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return null;
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// 确信有足够大的空间来容纳Cookie数据。
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cookieData = new StringBuilder(datasize);
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if (!InternetGetCookie(uri.ToString(), null, cookieData,
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ref datasize))
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return null;
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}
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if (cookieData.Length > 0) {
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cookies = new CookieContainer();
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cookies.SetCookies(uri, cookieData.ToString().Replace(';', ','));
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}
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return cookies;
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}
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}
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}
是不是相当简单阿,希望对大家有一点用处。
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