Question

以下代码适用于从当前pc.plz下载文件，建议我如何使用ip地址或任何方法从远程服务器下载

protected void Button1_Click(object sender, EventArgs e)
{
    const string fName = @"C:\ITFSPDFbills\February\AA.pdf";
    FileInfo fi = new FileInfo(fName);
    long sz = fi.Length;

    Response.ClearContent();
    Response.ContentType = MimeType(Path.GetExtension(fName));
    Response.AddHeader("Content-Disposition", string.Format("attachment; filename = {0}", System.IO.Path.GetFileName(fName)));
    Response.AddHeader("Content-Length", sz.ToString("F0"));
    Response.TransmitFile(fName);
    Response.End();
}

public static string MimeType(string Extension)
{
    string mime = "application/octetstream";
    if (string.IsNullOrEmpty(Extension))
        return mime;

    string ext = Extension.ToLower();
    Microsoft.Win32.RegistryKey rk = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
    if (rk != null && rk.GetValue("Content Type") != null)
        mime = rk.GetValue("Content Type").ToString();
    return mime;
}

Answer 1

这样做会更容易：

WebClient webClient = new WebClient();
webClient.DownloadFile(remoteFileUrl, localFileName);

Answer 2

您可以使用HttpWebRequest，如下所示：

        Uri uri = new Uri(""); // Here goes uri to the file.
        HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(uri);

        using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
        {
            using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
            {
                // Process response.
            }
        }

如何使用asp.net从远程服务器下载文件

2 个答案: