public static void GetPageHtml(string url,string savepath)//url参数为将要生成的那个动态页面的地址，savepath为要存放地址   
        {   
            string Result;   
            WebResponse MyResponse;   
            WebRequest MyRequest = System.Net.HttpWebRequest.Create(url);   
            MyResponse = MyRequest.GetResponse();   
            using (StreamReader MyReader = new StreamReader(MyResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("utf-8")))//这里根据网站的编码格式而定   
            {   
                Result = MyReader.ReadToEnd();   
                MyReader.Close();   
            }   
            FileStream fs = new FileStream(savepath, FileMode.Create, FileAccess.Write);   
            StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("utf-8"));   
            sw.WriteLine(Result);   
            sw.Close();   
            fs.Close();   
        }

------解决方案--------------------
protected override void Render(HtmlTextWriter writer) {  
 StreamWriter r=new StreamWriter(Server.MapPath(""), false,System.Text.Encoding.UTF8);  
 HtmlTextWriter h=new HtmlTextWriter(r);  
 base.Render(h);  
 r.Close();  
 h.Close();  
 }  
  StringWriter wr = new StringWriter();
  Server.Execute("", wr);    
  this.lit.Text = Server.HtmlEncode(wr.ToString());
  File.WriteAllText(Server.MapPath(""), wr.ToString());

------解决方案--------------------
C# code
public static void GetPageHtml(string url,string savepath)//url参数为将要生成的那个动态页面的地址，savepath为要存放地址   
        {   
            string Result;   
            WebResponse MyResponse;   
            WebRequest MyRequest = System.Net.HttpWebRequest.Create(url);   
            MyResponse = MyRequest.GetResponse();   
            using (StreamReader MyReader = new StreamReader(MyResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("utf-8")))//这里根据网站的编码格式而定   
            {   
                Result = MyReader.ReadToEnd();   
                MyReader.Close();   
            }   
            FileStream fs = new FileStream(savepath, FileMode.Create, FileAccess.Write);   
            StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("utf-8"));   
            sw.WriteLine(Result);   
            sw.Close();   
            fs.Close();   
        }