Asp.net 实现抓取网页，并存入数据库

using System.Net;
using System.IO;
using System.Text;

 

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            Response.Write(GetHtml("http://www.baidu.com"));
        }
    }
    public string GetHtml(string URL)
    {
      
        WebRequest wrt; wrt = WebRequest.Create(URL);
        wrt.Credentials = CredentialCache.DefaultCredentials;
        WebResponse wrp; wrp = wrt.GetResponse();
        return new StreamReader(wrp.GetResponseStream(), Encoding.Default).ReadToEnd();
    }