下载前1000个字节

我需要使用C＃从互联网上下载文本文件。 文件大小可能非常大，我需要的信息总是在前1000个字节内。 这可能吗？

Answer 1

从这里偷来了 。

string GetWebPageContent(string url) { string result = string.Empty; HttpWebRequest request; const int bytesToGet = 1000; request = WebRequest.Create(url) as HttpWebRequest; //get first 1000 bytes request.AddRange(0, bytesToGet - 1); // the following code is alternative, you may implement the function after your needs using (WebResponse response = request.GetResponse()) { using (Stream stream = response.GetResponseStream()) { byte[] buffer = new byte[1024]; int read = stream.Read(buffer, 0, 1000); Array.Resize(ref buffer, read); return Encoding.ASCII.GetString(buffer); } } } 

（根据评论中的要求编辑……;））

Answer 2

我这样做是为了回答你的新问题。 如果你愿意，你也可以把范围标题放入，但我将其排除在外。

  string GetWebPageContent(string url) { //string result = string.Empty; HttpWebRequest request; const int bytesToGet = 1000; request = WebRequest.Create(url) as HttpWebRequest; var buffer = new char[bytesToGet]; using (WebResponse response = request.GetResponse()) { using (StreamReader sr = new StreamReader(response.GetResponseStream())) { sr.Read(buffer, 0, bytesToGet); } } return new string(buffer); }