Upload multiple Files to FTP using FileUpload control in ASP.Net using C# and VB.Net

Use the following code to upload multiple files to FTP.

HTML

<asp:FileUpload ID="FileUpload1" runat="server" AllowMultiple="true" />
<asp:Button Text="Upload to FTP" runat="server" OnClick="FTPUpload" />
<hr />
<asp:Label ID="lblMessage" runat="server" />

C#

Namespaces

using System.IO;
using System.Net;
using System.Text;

Code

protected void FTPUpload(object sender, EventArgs e)
{
    //FTP Server URL.
    string ftp = "ftp://yourserver.com/";

    //FTP Folder name. Leave blank if you want to upload to root folder.
    string ftpFolder = "Uploads/";

    foreach (HttpPostedFile file in FileUpload1.PostedFiles)
    {
        byte[] fileBytes = null;

        //Read the FileName and convert it to Byte array.
        string fileName = Path.GetFileName(file.FileName);
        using (StreamReader fileStream = new StreamReader(file.InputStream))
        {
            fileBytes = Encoding.UTF8.GetBytes(fileStream.ReadToEnd());
            fileStream.Close();
        }

        try
        {
            //Create FTP Request.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftp + ftpFolder + fileName);
            request.Method = WebRequestMethods.Ftp.UploadFile;

            //Enter FTP Server credentials.
            request.Credentials = new NetworkCredential("username", "password");
            request.ContentLength = fileBytes.Length;
            request.UsePassive = true;
            request.UseBinary = true;
            request.ServicePoint.ConnectionLimit = fileBytes.Length;
            request.EnableSsl = false;

            using (Stream requestStream = request.GetRequestStream())
            {
                requestStream.Write(fileBytes, 0, fileBytes.Length);
                requestStream.Close();
            }

            FtpWebResponse response = (FtpWebResponse)request.GetResponse();

            lblMessage.Text += fileName + " uploaded.<br />";
            response.Close();
        }
        catch (WebException ex)
        {
            throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
        }
    }
}

VB.Net

Namespaces

Imports System.IO
Imports System.Net
Imports System.Text

Code

Protected Sub FTPUpload(sender As Object, e As EventArgs)
    'FTP Server URL.
    Dim ftp As String = "ftp://yourserver.com/"

    'FTP Folder name. Leave blank if you want to upload to root folder.
    Dim ftpFolder As String = "Uploads/"

    For Each file As HttpPostedFile In FileUpload1.PostedFiles
        Dim fileBytes As Byte() = Nothing

        'Read the FileName and convert it to Byte array.
        Dim fileName As String = Path.GetFileName(file.FileName)
        Using fileStream As New StreamReader(file.InputStream)
            fileBytes = Encoding.UTF8.GetBytes(fileStream.ReadToEnd())
            fileStream.Close()
        End Using

        Try
            'Create FTP Request.
            Dim request As FtpWebRequest = DirectCast(WebRequest.Create(ftp & ftpFolder & fileName), FtpWebRequest)
            request.Method = WebRequestMethods.Ftp.UploadFile

            'Enter FTP Server credentials.
            request.Credentials = New NetworkCredential("username", "password")
            request.ContentLength = fileBytes.Length
            request.UsePassive = True
            request.UseBinary = True
            request.ServicePoint.ConnectionLimit = fileBytes.Length
            request.EnableSsl = False

            Using requestStream As Stream = request.GetRequestStream()
                requestStream.Write(fileBytes, 0, fileBytes.Length)
                requestStream.Close()
            End Using

            Dim response As FtpWebResponse = DirectCast(request.GetResponse(), FtpWebResponse)

            lblMessage.Text += fileName & " uploaded.<br />"
            response.Close()
        Catch ex As WebException
            Throw New Exception(TryCast(ex.Response, FtpWebResponse).StatusDescription)
        End Try
    Next
End Sub