ユーザーが ASP.NET C# ページのダウンロード ボタンをクリックしたときに、FTP からファイルをダウンロードし、ユーザーの Web ブラウザーでダウンロード/保存プロンプトを開きたいと考えています。
string strDownloadURL = System.Configuration.ConfigurationSettings.AppSettings["DownloadURL"];
string HostName = System.Configuration.ConfigurationSettings.AppSettings["HostName"];
string strUser = System.Configuration.ConfigurationSettings.AppSettings["BasicAuthenticationUser"];
string strPWD = System.Configuration.ConfigurationSettings.AppSettings["BasicAuthenticationPWD"];
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(HostName + strFile);
request.Method = WebRequestMethods.Ftp.DownloadFile;
request.Credentials = new NetworkCredential(strUser, strPWD);
request.UsePassive = true;
request.UseBinary = true;
request.KeepAlive = false;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
string fileName = @"c:\temp\" + strFile + "";
Directory.CreateDirectory(Path.GetDirectoryName(fileName));
FileStream file = File.Create(fileName);
byte[] buffer = new byte[2 * 1024];
int read;
while ((read = responseStream.Read(buffer, 0, buffer.Length)) > 0) { file.Write(buffer, 0, read); }
file.Close();
responseStream.Close();
response.Close();