1、添加一個SetHeaderValue方法：

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public static void SetHeaderValue(WebHeaderCollection header, string name, string value) { var property = typeof(WebHeaderCollection).GetProperty("InnerCollection",BindingFlags.Instance | BindingFlags.NonPublic); if (property != null) { var collection = property.GetValue(header, null) as NameValueCollection; collection[name] = value; } }

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2、調用這個方法設置HttpHeader頭：

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HttpWebRequest rq = (HttpWebRequest)WebRequest.Create("Url"); rq.Method = "GET"; SetHeaderValue(rq.Headers, "Host", "127.0.0.1"); SetHeaderValue(rq.Headers, "Connection", "keep-alive"); SetHeaderValue(rq.Headers, "Accept", "*/*"); SetHeaderValue(rq.Headers, "X-Requested-With", "XMLHttpRequest"); SetHeaderValue(rq.Headers, "User-Agent", "..."); SetHeaderValue(rq.Headers, "Referer", "http://127.0.0.1/index.php?m=Index&a=indexs"); SetHeaderValue(rq.Headers, "Accept-Encoding", "gzip, deflate"); SetHeaderValue(rq.Headers, "Accept-Language", "1.5"); SetHeaderValue(rq.Headers, "Cookie", "This is Cookie");HttpWebResponse resp = (HttpWebResponse)rq.GetResponse();using (Stream stream = resp.GetResponseStream()) { StreamReader reader =new StreamReader(stream,Encoding.Default); string responseString = reader.ReadToEnd(); MessageBox.Show(responseString); }

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3.可以通過抓包軟件（如SRSniffer）查看到設置的報頭。

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來源;https://www.cnblogs.com/hnsongbiao/p/9381987.html

轉載于:https://www.cnblogs.com/sharing1986687846/p/10282527.html

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