20160113006 ASP. NET implementation FTP upload code (solve large file upload problem)

Using System;
Using System.Configuration;
Using System.Data;
Using System.Linq;
Using System.Web;
Using System.Web.Security;
Using System.Web.UI;
Using System.Web.UI.HtmlControls;
Using System.Web.UI.WebControls;
Using System.Web.UI.WebControls.WebParts;
Using System.Xml.Linq;
Using System.IO;
Using System.Net;
Using System.Text;

public partial class _default:system.web.ui.page
{
The following fields are configured in the Web. config
private string Ftpserverip = "127.0.0.1";//server IP
private string Ftpuserid = "ftptest";//user name Ftptest
private string FTPPassword = "ftptest";//Password
protected void Page_Load (object sender, EventArgs e)
{

if (Myfile.value! = "")
{
String a = MyFile.;
}

}

FTP upload function
private void Upload (string filename)
{
FileInfo Fileinf = new FileInfo (filename);

String uri = "ftp://" + Ftpserverip + "/" + fileinf.name;
FtpWebRequest reqftp;

To create a FtpWebRequest object from a URI
Reqftp = (ftpwebrequest) ftpwebrequest.create (New Uri ("ftp://" + Ftpserverip + "/" + Fileinf.name));

FTP User name and password
Reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);

The default is true and the connection is not closed
is executed after a command
Reqftp.keepalive = false;

Specify what commands to execute
Reqftp.method = WebRequestMethods.Ftp.UploadFile;

Specifying data Transfer Types
Reqftp.usebinary = true;

Notifies server file size when uploading a file
Reqftp.contentlength = Fileinf.length;

Buffer size set to 2KB
int bufflength = 2048;

byte[] buff = new Byte[bufflength];
int Contentlen;

Open a file stream (System.IO.FileStream) to read the uploaded file
FileStream fs = Fileinf.openread ();
Try
{
Write the uploaded file to the stream
Stream strm = Reqftp.getrequeststream ();

2KB per read file stream
Contentlen = fs. Read (Buff, 0, bufflength);

Stream content does not end
while (Contentlen! = 0)
{
Write content from file stream to upload stream
Strm. Write (Buff, 0, Contentlen);

Contentlen = fs. Read (Buff, 0, bufflength);
}

           //Turn off two streams
             STRM. Close ();
            FS. Close ();
            this. Page.registerstartupscript ("", "<script>alert (' success ') </script>");
       }
        catch (Exception ex)
        {
           //MessageBox.Show (ex. Message, "Upload Error");
            Response.Write ("Upload Error:" + ex.) Message);
       }
   }

The ability to download files from an FTP server
private void Download (String filePath, String fileName)
{
FtpWebRequest reqftp;

Try
{
FileStream outputstream = new FileStream (filePath + "\ \" + FileName, FileMode.Create);

Reqftp = (ftpwebrequest) ftpwebrequest.create (New Uri ("ftp://" + Ftpserverip + "/" + fileName);

Reqftp.method = WebRequestMethods.Ftp.DownloadFile;

Reqftp.usebinary = true;

Reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);

FtpWebResponse response = (ftpwebresponse) reqftp.getresponse ();

Stream FtpStream = Response. GetResponseStream ();

Long cl = Response. ContentLength;

int buffersize = 2048;

int readcount;

byte[] buffer = new Byte[buffersize];

Readcount = ftpstream.read (buffer, 0, buffersize);

while (Readcount > 0)
{
Outputstream.write (buffer, 0, readcount);

Readcount = ftpstream.read (buffer, 0, buffersize);
}

Ftpstream.close ();

Outputstream.close ();

Response. Close ();
}
catch (Exception ex)
{
Response.Write ("Download Error:" + ex.) Message);
}
}

Get a list of files from the FTP server
Public string[] Getfilelist ()
{
String[] Downloadfiles;
StringBuilder result = new StringBuilder ();
FtpWebRequest reqftp;
HttpWebRequest reqftp;
Try
{
Reqftp = (ftpwebrequest) ftpwebrequest.create (New Uri ("ftp://" + Ftpserverip + "/"));
Reqftp.usebinary = true;
Reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);
Reqftp.method = WebRequestMethods.Ftp.ListDirectory;
WebResponse response = Reqftp.getresponse ();
StreamReader reader = new StreamReader (response. GetResponseStream ());
String line = reader. ReadLine ();
while (line! = null)
{
Result. Append (line);
Result. Append ("\ n");
line = reader. ReadLine ();
}
To remove the trailing ' \ n '
Result. Remove (result. ToString (). LastIndexOf (' \ n '), 1);
Reader. Close ();
Response. Close ();
return result. ToString (). Split (' \ n ');
}
catch (Exception ex)
{
Downloadfiles = null;
return downloadfiles;
}
}

protected void Button1_Click (object sender, EventArgs e)
{
Upload ("F:\\ Captain America DVD in Word. rmvb");
}
protected void button2_click (object sender, EventArgs e)
{

}
}

20160113006 ASP. NET implementation FTP upload code (solve large file upload problem)