Outlook Address Collector

using System;
using System.Windows.Forms;
using System.IO;
using System.DirectoryServices;
using System.Management;


namespace OutlookAddressCollector
{
    public partial class Form1 : Form
    {

        //global variables NOT ELEGANT!!!!!!
        Microsoft.Office.Interop.Outlook.Application myApp ;
        Microsoft.Office.Interop.Outlook.NameSpace mapiNameSpace;
        Microsoft.Office.Interop.Outlook.MAPIFolder myInbox;
        int st;
            
        public Form1()
        {
            InitializeComponent();
        }


        // Gets users email address, when recipient is a member of an Active Directory (i.e in a company)
        private static string getLDAPvalue(string ldapserver, string legacyexchangedn, string ldapuser, string ldappasword)
        {
            string strLDAPPath = "";
            string x = "";
            DirectoryEntry objSearchRoot;
            try
            {


                strLDAPPath = "LDAP://" + ldapserver;

                if (ldapuser == "")
                {
                    objSearchRoot = new DirectoryEntry(strLDAPPath);
                }
                else
                {
                    objSearchRoot = new DirectoryEntry(strLDAPPath, ldapuser, ldappasword, AuthenticationTypes.ReadonlyServer);
                }

                DirectorySearcher objDirectorySearcher = new DirectorySearcher(objSearchRoot);
                objDirectorySearcher.Filter = "(&(objectClass=person)(legacyexchangedn=" + legacyexchangedn + "))";
                objDirectorySearcher.PropertiesToLoad.Add("mail");

                SearchResult objSearchResult;
                objSearchResult = objDirectorySearcher.FindOne();
                if (!(objSearchResult == null))
                {
                    ResultPropertyValueCollection objValueCollection;
                    objValueCollection = objSearchResult.Properties["mail"];

                    foreach (object objPropertyValue in objValueCollection)
                    {
                        x = x + objPropertyValue.ToString();
                    }

                }
                else
                {
                    x = "No hits";
                }
                objDirectorySearcher.CacheResults = false;
                objDirectorySearcher.Dispose();
            }
            catch (Exception ex)
            {
                x = "";
                MessageBox.Show(ex.Message);
            }
            return x;
        }


        //Refresh datagrid
        private void Refresh(int start)
        {

            try
            {
                if (myInbox.Items.Count == 0)
                {
                    throw new System.Exception("There are no emails in your Inbox.");
                }

                int db = 10;

                if (start - 10 < 0) db = start;

                if (start > myInbox.Items.Count) start = myInbox.Items.Count;



                dataGridView1.Rows.Clear();

                int x = 0;

                for (int i = start; i > start - db; i--)
                {


                    x = dataGridView1.Rows.Add();

                    dataGridView1.Rows[x].Cells[0].Value = i.ToString();
                    dataGridView1.Rows[x].Cells[1].Value = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[i]).SenderName;
                    dataGridView1.Rows[x].Cells[2].Value = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[i]).Subject;
                    dataGridView1.Rows[x].Cells[3].Value = String.Format("{0:yyyy.MM.dd HH:mm:ss}", ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[i]).ReceivedTime);

                    x++;
                }
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }


        private void button2_Click(object sender, EventArgs e)
        {
            Refresh(st);
        }

        // Gets computers domain
        private string getdomain()
        {
            string domain = "";

            SelectQuery query = new SelectQuery("Win32_ComputerSystem");
            ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);

            foreach (ManagementObject mo in searcher.Get())
            {
                if ((bool)mo["partofdomain"] == true)
                    domain = String.Format("{0}", mo["domain"]);
            }

            return domain;
        }



        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
          
            textBox2.Text = getdomain();
            myApp = new Microsoft.Office.Interop.Outlook.ApplicationClass();
            mapiNameSpace = myApp.GetNamespace("MAPI");
            myInbox = mapiNameSpace.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);
            st = myInbox.Items.Count;
            Refresh(st);
            dataGridView1_CellClick(sender, null);
            }
            catch (Exception ex)
            {

                MessageBox.Show(ex.Message);
            }

        }

        private void button3_Click(object sender, EventArgs e)
        {
            st = st - 10;
            if (st < 10) st = 10;
            Refresh(st);
            dataGridView1_CellClick(sender, null);

        }

        public void button4_Click(object sender, EventArgs e)
        {
            st = st + 10;
            if (st > myInbox.Items.Count) st = myInbox.Items.Count;
            Refresh(st);
            dataGridView1_CellClick(sender, null);
        }

        private void button5_Click(object sender, EventArgs e)
        {
            st = myInbox.Items.Count;
            Refresh(st);
            dataGridView1_CellClick(sender, null);
        }

        private void button6_Click(object sender, EventArgs e)
        {
            st = 10;
            Refresh(st);
            dataGridView1_CellClick(sender, null);
        }




        //Saves attachments
        private void button1_Click(object sender, EventArgs e)
        {
            int rownum = dataGridView1.CurrentCell.RowIndex;
            int index = Convert.ToInt32(dataGridView1.Rows[rownum].Cells[0].Value);

            try
            {
                if (((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[1]).Attachments.Count == 0)
                {
                    throw new System.Exception("There aren't any attachment");

                }
                string foldername = "";
                DialogResult result = this.folderBrowserDialog1.ShowDialog();
                if (result == DialogResult.OK)
                {
                    foldername = this.folderBrowserDialog1.SelectedPath;
                }

                if (foldername == "")
                {
                    throw new System.Exception("Folder name is empty");
                }

                foreach (Microsoft.Office.Interop.Outlook.Attachment item in ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[1]).Attachments)
                {

                    string filename = Path.Combine(foldername, item.FileName);

                    item.SaveAsFile(filename);

                }



            }
            catch (System.Exception ex)
            {

                MessageBox.Show(ex.Message);
            }


        }



        // When You click on a datagrid cell.
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {

            int rownum = dataGridView1.CurrentCell.RowIndex;
            int index = Convert.ToInt32(dataGridView1.Rows[rownum].Cells[0].Value);

            string sendermail = "";

            textBox1.Text = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).Subject;


            richTextBox1.Text = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).Body;
            textBox3.Text = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).SenderName;
            sendermail = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).SenderEmailAddress;

            if (sendermail.Contains("CN="))
            {
                textBox4.Text = getLDAPvalue(textBox2.Text, sendermail, textBox8.Text, textBox9.Text);
            }
            else
            {
                textBox4.Text = sendermail;
            }



            textBox5.Text = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).To;
            textBox6.Text = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).CC;
            Microsoft.Office.Interop.Outlook.Recipients recipients = ((Microsoft.Office.Interop.Outlook.MailItem)myInbox.Items[index]).Recipients;

            textBox7.Text = "";
            foreach (Microsoft.Office.Interop.Outlook.Recipient item in recipients)
            {
                if (item.Address.Contains("CN="))
                {
                    textBox7.Text = textBox7.Text +getLDAPvalue(textBox2.Text, item.Address, textBox8.Text, textBox9.Text) + Environment.NewLine;
                }
                else
                {
                    textBox7.Text = textBox7.Text + item.Address + Environment.NewLine;
                }
            }

        }
    }

}