มีวิธี นับจำนวน file folder ใน ftp ไหมครับ ลองใช้ system.io เเล้วใช้ไมได้ครับ

YourUserName
YourPassword
ls -l
bye

ftp -s:ftpcmd.txt 127.0.0.1 > output.txt
type NUL > ftpcmd.txt
del ftpcmd.txt

System.Diagnostics.Process.Start(@"c:\ftpbatch.bat");

namespace FtpClient
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.label3 = new System.Windows.Forms.Label();
            this.textBox3 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.listView1 = new System.Windows.Forms.ListView();
            this.columnHeader1 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
            this.columnHeader2 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
            this.columnHeader3 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
            this.button2 = new System.Windows.Forms.Button();
            this.button3 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(13, 13);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(32, 13);
            this.label1.TabIndex = 0;
            this.label1.Text = "Host:";
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(81, 6);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(214, 20);
            this.textBox1.TabIndex = 1;
            this.textBox1.Text = "ftp://";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(12, 35);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(63, 13);
            this.label2.TabIndex = 2;
            this.label2.Text = "User Name:";
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(81, 32);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(214, 20);
            this.textBox2.TabIndex = 2;
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(13, 61);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(56, 13);
            this.label3.TabIndex = 3;
            this.label3.Text = "Password:";
            // 
            // textBox3
            // 
            this.textBox3.Location = new System.Drawing.Point(81, 58);
            this.textBox3.Name = "textBox3";
            this.textBox3.PasswordChar = '*';
            this.textBox3.Size = new System.Drawing.Size(214, 20);
            this.textBox3.TabIndex = 3;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(16, 84);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 4;
            this.button1.Text = "Connect";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // listView1
            // 
            this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
            this.columnHeader1,
            this.columnHeader2,
            this.columnHeader3});
            this.listView1.Location = new System.Drawing.Point(16, 113);
            this.listView1.Name = "listView1";
            this.listView1.Size = new System.Drawing.Size(279, 137);
            this.listView1.TabIndex = 5;
            this.listView1.UseCompatibleStateImageBehavior = false;
            this.listView1.View = System.Windows.Forms.View.Details;
            // 
            // columnHeader1
            // 
            this.columnHeader1.Text = "Name";
            this.columnHeader1.Width = 155;
            // 
            // columnHeader2
            // 
            this.columnHeader2.Text = "Type";
            // 
            // columnHeader3
            // 
            this.columnHeader3.Text = "Size";
            // 
            // button2
            // 
            this.button2.Enabled = false;
            this.button2.Location = new System.Drawing.Point(16, 257);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(75, 23);
            this.button2.TabIndex = 6;
            this.button2.Text = "Upload";
            this.button2.UseVisualStyleBackColor = true;
            // 
            // button3
            // 
            this.button3.Enabled = false;
            this.button3.Location = new System.Drawing.Point(220, 257);
            this.button3.Name = "button3";
            this.button3.Size = new System.Drawing.Size(75, 23);
            this.button3.TabIndex = 7;
            this.button3.Text = "Delete";
            this.button3.UseVisualStyleBackColor = true;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(307, 289);
            this.Controls.Add(this.button3);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.listView1);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.textBox3);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.label1);
            this.Name = "Form1";
            this.Text = "Ftp Client";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.TextBox textBox3;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.ListView listView1;
        private System.Windows.Forms.ColumnHeader columnHeader1;
        private System.Windows.Forms.ColumnHeader columnHeader2;
        private System.Windows.Forms.ColumnHeader columnHeader3;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Button button3;

    }
}

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;

namespace FtpClient
{
    public partial class Form1 : Form
    {
        private bool Connected;

        public Form1()
        {
            InitializeComponent();

            Connected = false;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (Connected)
            {
                listView1.Items.Clear();

                button1.Text = "Connect";
                button2.Enabled = false;
                button3.Enabled = false;
                textBox1.ReadOnly = false;
                textBox2.ReadOnly = false;
                textBox3.ReadOnly = false;

                Connected = false;
            }
            else
            {
                try
                {
                    // ถ้าเอาแค่จำนวนก็ใช้ Dt.Rows.Count ก็จะได้จำนวน file + folder แต่ถ้าจะเอาเฉพาะ file ก็ต้องตรวจเงื่อนไขในลูป
                    DataTable Dt = FtpClientManager.DisplayFtpFile(new Uri(textBox1.Text), textBox2.Text, textBox3.Text);

                    foreach (DataRow Dr in Dt.Rows)
                    {
                        ListViewItem ListViewItem1 = new ListViewItem();
                        ListViewItem1.Text = Dr["FileName"].ToString();
                        ListViewItem1.SubItems.Add(Dr["FileType"].ToString());
                        ListViewItem1.SubItems.Add(Dr["FileSize"].ToString());
                        listView1.Items.Add(ListViewItem1);

                        button1.Text = "Disconnect";
                        button2.Enabled = true;
                        button3.Enabled = true;
                        textBox1.ReadOnly = true;
                        textBox2.ReadOnly = true;
                        textBox3.ReadOnly = true;
                    }

                    Connected = true;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Data;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;

namespace FtpClient
{
    class FtpClientManager
    {
        public struct FileStruct
        {
            public string Flags;
            public string Owner;
            public string Group;
            public bool IsDirectory;
            public DateTime CreateTime;
            public string Name;
        }

        public enum FileListStyle
        {
            UnixStyle,
            WindowsStyle,
            Unknown
        }

        public static DataTable DisplayFtpFile(Uri serverUri, string userName, string password)
        {
            DataTable Dt = new DataTable();
            Dt.Columns.Add(new DataColumn("FileName", typeof(string)));
            Dt.Columns.Add(new DataColumn("FileType", typeof(string)));
            Dt.Columns.Add(new DataColumn("FileSize", typeof(int)));

            // The serverUri parameter should start with the ftp:// scheme.
            if (serverUri.Scheme != Uri.UriSchemeFtp)
            {
                DataRow Dr = Dt.NewRow();
                Dr["FileName"] = "Invalid Uri.";
                Dr["FileType"] = string.Empty;
                Dr["FileSize"] = 0;
                Dt.Rows.Add(Dr);
            }

            // Get the object used to communicate with the server.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
            request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

            // This example assumes the FTP site uses anonymous logon.
            request.Credentials = new NetworkCredential(userName, password);
            request.Proxy = null;  
            FtpWebResponse response = request.GetResponse() as FtpWebResponse;

            try
            {
                StreamReader sr = new StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);
                string Datastring = sr.ReadToEnd();
                response.Close();

                FileStruct[] list = (new FtpClientManager()).GetList(Datastring);

                foreach (FileStruct thisstruct in list)
                {
                    DataRow Dr = Dt.NewRow();
                    Dr["FileName"] = thisstruct.Name;
                    Dr["FileType"] = (thisstruct.IsDirectory) ? "Folder" : "File";
                    Dr["FileSize"] = 0;
                    Dt.Rows.Add(Dr);
                }  
            }
            catch (WebException ex)
            {
                DataRow Dr = Dt.NewRow();
                Dr["FileName"] = ex.Message;
                Dr["FileType"] = string.Empty;
                Dr["FileSize"] = 0;
                Dt.Rows.Add(Dr);
            }

            return Dt;
        }

        private FileStruct[] GetList(string datastring)
        {
            List<FileStruct> myListArray = new List<FileStruct>();
            string[] dataRecords = datastring.Split('\n');
            FileListStyle _directoryListStyle = GuessFileListStyle(dataRecords);
            foreach (string s in dataRecords)
            {
                if (_directoryListStyle != FileListStyle.Unknown && s != "")
                {
                    FileStruct f = new FileStruct();
                    f.Name = "..";
                    switch (_directoryListStyle)
                    {
                        case FileListStyle.UnixStyle:
                            f = ParseFileStructFromUnixStyleRecord(s);
                            break;
                        case FileListStyle.WindowsStyle:
                            f = ParseFileStructFromWindowsStyleRecord(s);
                            break;
                    }
                    if (!(f.Name == "." || f.Name == ".."))
                    {
                        myListArray.Add(f);
                    }
                }
            }
            return myListArray.ToArray(); ;
        }

        private FileStruct ParseFileStructFromWindowsStyleRecord(string Record)
        {
            ///Assuming the record style as
            /// 02-03-04  07:46PM       <DIR>          Append
            FileStruct f = new FileStruct();
            string processstr = Record.Trim();
            string dateStr = processstr.Substring(0, 8);
            processstr = (processstr.Substring(8, processstr.Length - 8)).Trim();
            string timeStr = processstr.Substring(0, 7);
            processstr = (processstr.Substring(7, processstr.Length - 7)).Trim();
            f.CreateTime = DateTime.Parse(dateStr + " " + timeStr);
            if (processstr.Substring(0, 5) == "<DIR>")
            {
                f.IsDirectory = true;
                processstr = (processstr.Substring(5, processstr.Length - 5)).Trim();
            }
            else
            {
                string[] strs = processstr.Split(new char[] { ' ' });
                processstr = strs[1].Trim();
                f.IsDirectory = false;
            }
            f.Name = processstr;  //Rest is name   
            return f;
        }


        public FileListStyle GuessFileListStyle(string[] recordList)
        {
            foreach (string s in recordList)
            {
                if (s.Length > 10
                 && Regex.IsMatch(s.Substring(0, 10), "(-|d)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)"))
                {
                    return FileListStyle.UnixStyle;
                }
                else if (s.Length > 8
                 && Regex.IsMatch(s.Substring(0, 8), "[0-9][0-9]-[0-9][0-9]-[0-9][0-9]"))
                {
                    return FileListStyle.WindowsStyle;
                }
            }
            return FileListStyle.Unknown;
        }

        private FileStruct ParseFileStructFromUnixStyleRecord(string Record)
        {
            ///Assuming record style as
            /// dr-xr-xr-x   1 owner    group               0 Nov 25  2002 bussys
            FileStruct f = new FileStruct();
            string processstr = Record.Trim();
            f.Flags = processstr.Substring(0, 9);
            f.IsDirectory = (f.Flags[0] == 'd');
            processstr = (processstr.Substring(11)).Trim();
            _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //skip one part
            f.Owner = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
            f.Group = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
            _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //skip one part
            f.CreateTime = DateTime.Parse(_cutSubstringFromStringWithTrim(ref processstr, ' ', 8));
            f.Name = processstr;   //Rest of the part is name
            return f;
        }

        private string _cutSubstringFromStringWithTrim(ref string s, char c, int startIndex)
        {
            int pos1 = s.IndexOf(c, startIndex);
            string retString = s.Substring(0, pos1);
            s = (s.Substring(pos1)).Trim();
            return retString;
        }
    }
}