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  • C# 获取网页源码

    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 

    private string GetWebClient(string url)
    {
        string strHTML = "";
        WebClient myWebClient = new WebClient();
        Stream myStream = myWebClient.OpenRead(url);
        StreamReader sr = new StreamReader(myStream, System.Text.Encoding.GetEncoding("utf-8"));
        strHTML = sr.ReadToEnd();
        myStream.Close();
        return strHTML;
    }


    WebRequest 

    private string GetWebRequest(string url)
    {
        Uri uri = new Uri(url);
        WebRequest myReq = WebRequest.Create(uri);
        WebResponse result = myReq.GetResponse();
        Stream receviceStream = result.GetResponseStream();
        StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
        string strHTML = readerOfStream.ReadToEnd();
        readerOfStream.Close();
        receviceStream.Close();
        result.Close();
        return strHTML;
    }


    HttpWebRequest 

    private string GetHttpWebRequest(string url)
    {
        Uri uri = new Uri(url);
        HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(uri);
        myReq.UserAgent = "User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705";
        myReq.Accept = "*/*";
        myReq.KeepAlive = true;
        myReq.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");
        HttpWebResponse result = (HttpWebResponse)myReq.GetResponse();
        Stream receviceStream = result.GetResponseStream();
        StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
        string strHTML = readerOfStream.ReadToEnd();
        readerOfStream.Close();
        receviceStream.Close();
        result.Close();
        return strHTML;
    }


    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。

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  • 原文地址:https://www.cnblogs.com/testsec/p/6095525.html
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