Upload File to an FTP Server By using FtpWebRequest Class in C#.NET

In System.Net namespace the FtpWebRequest class is used for implementing a File Transfer Protocol(FTP) client . By using Credentials property first the .NET framework connect to FTP Server then The Create method is creates the file with same name as we selected by browse button, After that the file is reading by using OpenRead() method of FileStream class to a buffer, And then the buffer data is sequentially copied to FTP server File.

The Sample Application For Uploading File to FTP Server:

This below sample Code shows how to upload a file to an FTP server. 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Net;

using System.IO;

namespace FileUploadToFTP

{

    public partial class Form1 : Form

    {

        string filePath;

        public Form1()

        {

            InitializeComponent();

        }

                   

        private void btnBrowse_Click(object sender, EventArgs e)

        {

            openFileDialog1.CheckFileExists = true;

            openFileDialog1.Filter = "*|*";

            openFileDialog1.FileName = "";

           

            openFileDialog1.InitialDirectory = Environment.CurrentDirectory.ToString();

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                filePath = openFileDialog1.FileName.ToString();

            }

            txtFileUpPath.Text = filePath;

           

        }

        private void btnUpload_Click(object sender, EventArgs e)

        {

            if (filePath == "")

            {

                MessageBox.Show("Please Select The File To Upload..");

            }

            else

            {

                btnUpload.Enabled = false;

                try

                {

                    FileInfo fileInfo = new FileInfo(filePath);

                    string fileName = fileInfo.Name.ToString();

                    WebRequest requestFTP = WebRequest.Create("ftp://" + txtHost.Text + "/" + fileName);

                    requestFTP.Credentials = new NetworkCredential(txtUname.Text, txtPsw.Text);

                    requestFTP.Method = WebRequestMethods.Ftp.UploadFile;

                    FileStream fStream = fileInfo.OpenRead();

                    int bufferLength = 2048;

                    byte[] buffer = new byte[bufferLength];

                    Stream uploadStream = requestFTP.GetRequestStream();

                    int contentLength = fStream.Read(buffer, 0, bufferLength);

                    while (contentLength != 0)

                    {

                        uploadStream.Write(buffer, 0, contentLength);

                        contentLength = fStream.Read(buffer, 0, bufferLength);

                    }

                    uploadStream.Close();

                    fStream.Close();

                    requestFTP = null;

                    MessageBox.Show("File Uploading Is SuccessFull...");

                }

                catch (Exception ep)

                {

                    MessageBox.Show("ERROR: " + ep.Message.ToString());

                   

                }

                btnUpload.Enabled = true;

                filePath = "";

                txtHost.Text = txtUname.Text = txtPsw.Text = txtFileUpPath.Text = "";

            }

           

        }

       

    }

}

For Entire Solution code File CLICK HERE.