C#获取指定网页HTML原代码可使用 WebClient WebRequest HttpWebRequest 三种方式来实现。
当然也可使用webBrowse！在此就不研究webBrowse如何获取了。
WebClient
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private string GetWebClient(string url)
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WebClient myWebClient = new WebClient();
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Stream myStream = myWebClient.OpenRead(url);
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StreamReader sr = new StreamReader(myStream, System.Text.Encoding.GetEncoding("utf-8"));
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strHTML = sr.ReadToEnd();
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WebRequest
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private string GetWebRequest(string url)
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WebRequest myReq = WebRequest.Create(uri);
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WebResponse result = myReq.GetResponse();
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Stream receviceStream = result.GetResponseStream();
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StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
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string strHTML = readerOfStream.ReadToEnd();
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HttpWebRequest
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private string GetHttpWebRequest(string url)
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HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(uri);
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myReq.UserAgent = "User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705";
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myReq.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");
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HttpWebResponse result = (HttpWebResponse)myReq.GetResponse();
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Stream receviceStream = result.GetResponseStream();
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//www.elivn.com
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StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
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string strHTML = readerOfStream.ReadToEnd();
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注意“utf-8”应与指定网页的编码对应。
总结
可以看到HttpWebRequest 方式最复杂，但确提供了更多的选择性。
有的网站检测客户端的UserAgent！如163.com，你如果使用WebClient WebRequest方式获取时，将获取到的是错误提示页面内容。
而通过HttpWebRequest 就没问题。
源码下载
测试环境：WIN2003 + VS2005 + C# + winForm
