下载前1000个字节 [英] Download the first 1000 bytes

问题描述

我需要使用C＃从互联网上下载的文本文件。该文件的大小是相当大的，我需要的信息总是第一个1000字节之内。这可能吗？

I need to download a text file from the internet using C#. The file size can be quite large and the information I need is always within the first 1000 bytes. Is this possible?

推荐答案

偷走<一个href="http://social.msdn.microsoft.com/Forums/en-US/Vsex$p$pssvcs/thread/ce0e2e13-ec2c-468f-beea-469acb2468fd">here.

Stolen from here.

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);
        }

    }
}

（编辑整理的要求，在评论...;））

(Edited as requested in the comments... ;) )

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