Download file from FTP and how prompt user to save/open file in ASP.NET C#
从FTP下载文件以及如何提示用户在ASP.NET C中保存/打开文件#
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();
1 个解决方案
#1
1
So, assuming you're writing the FTP request's response stream down to the ASP.NET response stream, and want to trigger the download dialog in the browser, you'll want to set the Content-Disposition header in the response.
因此,假设您将FTP请求的响应流写入ASP.NET响应流,并希望在浏览器中触发下载对话框,则需要在响应中设置Content-Disposition标头。
// note: since you are writing directly to client, I removed the `file` stream
// in your original code since we don't need to store the file locally...
// or so I am assuming
Response.AddHeader("content-disposition", "attachment;filename=" + strFile);
byte[] buffer = new byte[2 * 1024];
int read;
while ((read = responseStream.Read(buffer, 0, buffer.Length)) > 0)
{
Response.OutputStream.Write(buffer, 0, read);
}
responseStream.Close();
response.Close();
#1
1
So, assuming you're writing the FTP request's response stream down to the ASP.NET response stream, and want to trigger the download dialog in the browser, you'll want to set the Content-Disposition header in the response.
因此,假设您将FTP请求的响应流写入ASP.NET响应流,并希望在浏览器中触发下载对话框,则需要在响应中设置Content-Disposition标头。
// note: since you are writing directly to client, I removed the `file` stream
// in your original code since we don't need to store the file locally...
// or so I am assuming
Response.AddHeader("content-disposition", "attachment;filename=" + strFile);
byte[] buffer = new byte[2 * 1024];
int read;
while ((read = responseStream.Read(buffer, 0, buffer.Length)) > 0)
{
Response.OutputStream.Write(buffer, 0, read);
}
responseStream.Close();
response.Close();