c# - 下载前 1000 个字节

Question

我需要使用 C# 从 Internet 下载一个文本文件。文件大小可能非常大，我需要的信息总是在前 1000 个字节以内。这可能吗？

Answer 1

盗自 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);
        }

    }
}

(根据评论中的要求编辑...;))