WebClient client = new WebClient();

第一种

string URLAddress = @"";

string receivePath=@"C:\";

client.DownloadFile(URLAddress, receivePath + System.IO.Path.GetFileName(URLAddress));

就OK了。

第二种

　Stream str = client.OpenRead(URLAddress);

   StreamReader reader = new StreamReader(str);

   byte[] mbyte = new byte[1000000];

   int allmybyte = (int)mbyte.Length;

   int startmbyte = 0;

   while (allmybyte > 0)

   {

    int m = str.Read(mbyte, startmbyte, allmybyte);

    if (m == 0)

     break;

    startmbyte += m;

    allmybyte -= m;

   }

   reader.Dispose();

   str.Dispose();

   string path = receivePath + System.IO.Path.GetFileName(URLAddress);

   FileStream fstr = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);

   fstr.Write(mbyte, 0, startmbyte);

   fstr.Flush();

   fstr.Close();

 

利用webclient读取html内容

public static string GetWebClient(string url)

{

    

string 

strHTML = 

""

;

    

WebClient myWebClient = 

new 

WebClient();            

    

Stream myStream = myWebClient.OpenRead(url);

    

StreamReader sr = 

new 

StreamReader(myStream, Encoding.Default);

//注意编码

    

strHTML = sr.ReadToEnd();

    

myStream.Close();

    

return 

strHTML;

}