C# Winform获取网页源文件的实现方法

//引入名称空间
using System.IO;
using System.Net;

WebClient MyWebClient = new WebClient();

MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据
Byte[] pageData = MyWebClient.DownloadData("http://www.jbxue.com");
//string pageHtml = Encoding.Default.GetString(pageData);
FileStream file = new FileStream("C:\\test.html", FileMode.Create);
file.Write(pageData, 0, pageData.Length);

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;
}

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;
}

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;
}