Connect to Multiple Virtual Machines - C# Desktop App

using System;using System.Windows.Forms;using MSTSCLib;using AxMSTSCLib;using System.Collections.Generic;namespace RemoteDesktop{public partial class RemoteConnectionForm : Form{// Used to dinamically add tabsprivate DynamicTabGenerator tabGenerator;// Used to validate credentialsprivate Validation validation;//Restore and store credentials that achieved a successful connectionprivate List<ConnectionCredentials> credentialsList;private StoreManager storeManager;// Timer Object User to Invalidate Connection button for 5 seconds
        Timer connectionTimer;// Constructorpublic RemoteConnectionForm(){
            InitializeComponent();

            tabGenerator =new DynamicTabGenerator();
            validation =new Validation();
            credentialsList =new List<ConnectionCredentials>();
            storeManager =new StoreManager();

            connectionTimer =new Timer();
            connectionTimer.Interval =10000;
            connectionTimer.Tick += Timer_Tick;

            txtPassword.PasswordChar ='*';
            WindowState = FormWindowState.Maximized;

            LoadExistingCredentials();}privatevoid LoadExistingCredentials(){
            credentialsList = storeManager.LoadCredentials();if(credentialsList.Count !=0){
                txtServer.Text = credentialsList[0].ServerIP;
                txtUserName.Text = credentialsList[0].UserName;
                txtPassword.Text = credentialsList[0].UserPassword;}}// Try to connect to specified remoteprivatevoid ConnectRemote(){
            connectionTimer.Start();
            btnConnect.Enabled =false;try{var remote = GetTabPageSpecificRemoteControl(null);if(remote ==null){
                    MessageBox.Show("Form not properly configured.");return;}

                remote.Server = txtServer.Text;
                remote.UserName = txtUserName.Text;var secured =(IMsTscNonScriptable)remote.GetOcx();
                secured.ClearTextPassword = txtPassword.Text;
                remote.Connect();}catch(Exception err){// Notify for specific errors
                MessageBox.Show(err.Message,"Error", MessageBoxButtons.OK);}}// Verify if connection is still openedprivatevoid DisconnectRemote(AxMsTscAxNotSafeForScripting remote){try{if(remote.Connected.ToString()=="1"){
                    remote.Disconnect();}}catch{}}// Validate connection credentialsprivatebool ValidateInput(){if(!validation.Validate(GetCurrentPageCredentials())){
                MessageBox.Show("Server, Username or Password cannot be empty.");returnfalse;}returntrue;}// Will create an instance of ConnectionCredentials with values from the formprivate ConnectionCredentials GetCurrentPageCredentials(){
            ConnectionCredentials credentials =new ConnectionCredentials();
            credentials.ServerIP = txtServer.Text;
            credentials.UserName = txtUserName.Text;
            credentials.UserPassword = txtPassword.Text;return credentials;}// Extract specific connection control from a specific tab page// Page param must be null if you want method to detect user selected tabprivate AxMsTscAxNotSafeForScripting GetTabPageSpecificRemoteControl(TabPage page){if(page ==null){
                page = tabCtrl.SelectedTab;}foreach(var ctrl in page.Controls){if(ctrl is AxMsTscAxNotSafeForScripting){return(AxMsTscAxNotSafeForScripting)ctrl;}}returnnull;}// Connect Button event handlerprivatevoid btnConnect_Click(object sender, EventArgs e){if(ValidateInput()){
                ConnectRemote();}}// Disconnect Button event handlerprivatevoid btnDisconnect_Click(object sender, EventArgs e){
            DisconnectRemote(GetTabPageSpecificRemoteControl(null));}// The ">" - add tab button that dynamically creates a new tab with remote control insideprivatevoid btnCreateTab_Click(object sender, EventArgs e){
            tabGenerator.CreateNewTab(tabCtrl);}// Event Raised when tab is changedprivatevoid tabCtrl_SelectedIndexChanged(object sender, EventArgs e){if(credentialsList.Count >= tabCtrl.SelectedIndex +1){int index = tabCtrl.SelectedIndex;
                txtServer.Text = credentialsList[index].ServerIP;
                txtUserName.Text = credentialsList[index].UserName;
                txtPassword.Text = credentialsList[index].UserPassword;}else{
                txtServer.Text =string.Empty;
                txtUserName.Text =string.Empty;
                txtPassword.Text =string.Empty;}

            btnConnect.Enabled =true;}// Will check if remote control is connected after the 10 sec interval// the reason for this is because connection cannot be checked instantlyprivatevoid Timer_Tick(object sender, EventArgs e){if(!validation.ValidateConnection(GetTabPageSpecificRemoteControl(null))){
                MessageBox.Show("Connection failed. Please check your credentials.");}else{var credentials = GetCurrentPageCredentials();if(!validation.AreCredentialsDuplicate(credentials, credentialsList)){
                    credentialsList.Add(credentials);}}
            btnConnect.Enabled =true;
            connectionTimer.Stop();}// Form Closing Event Handler// Make sure all connections are closedprivatevoid RemoteConnectionForm_FormClosing(object sender, FormClosingEventArgs e){foreach(TabPage tabPage in tabCtrl.TabPages){var remote = GetTabPageSpecificRemoteControl(tabPage);
                DisconnectRemote(remote);}if(credentialsList.Count >0){
                storeManager.SaveCredentials(credentialsList);}}}}

publicclass ConnectionCredentials{publicstring ServerIP {get;set;}publicstring UserName {get;set;}publicstring UserPassword {get;set;}}

using AxMSTSCLib;using System.ComponentModel;using System.Windows.Forms;namespace RemoteDesktop{publicclass DynamicTabGenerator{private AxMsTscAxNotSafeForScripting remoteConControl;// Dinamically create Tab Page Control and remote connection control inside itpublicvoid CreateNewTab(TabControl tabControl){
            TabPage page =new TabPage("VM"+(tabControl.TabPages.Count +1).ToString());

            tabControl.TabPages.Add(page);

            remoteConControl = CreateRemoteControl();

            page.Controls.Add(remoteConControl);}// Create the remote connection object / controlprivate AxMsTscAxNotSafeForScripting CreateRemoteControl(){
            ComponentResourceManager resources =new ComponentResourceManager(typeof(RemoteConnectionForm));
            remoteConControl =new AxMsTscAxNotSafeForScripting();//Code above is related to UI stuff - same as designer file code for the controls on tab1/2 ((ISupportInitialize)(remoteConControl)).BeginInit();
            remoteConControl.Anchor =((AnchorStyles)((((AnchorStyles.Top 
                                                       | AnchorStyles.Bottom)
                                                       | AnchorStyles.Left)
                                                       | AnchorStyles.Right)));
            remoteConControl.Enabled =true;
            remoteConControl.Location =new System.Drawing.Point(0,0);
            remoteConControl.Name ="remoteConControl";
            remoteConControl.OcxState =((AxHost.State)(resources.GetObject("remoteConControl.OcxState")));
            remoteConControl.Size =new System.Drawing.Size(1001,670);
            remoteConControl.TabIndex =0;
            remoteConControl.Dock = DockStyle.Fill;return remoteConControl;}}}

using System.Collections.Generic;using System.IO;using System.Xml;using System.Xml.Serialization;namespace RemoteDesktop{publicclass StoreManager{// Save credentials except password to XMLpublicvoid SaveCredentials(List<ConnectionCredentials> credentials){
            CreateFileIfNeeded();
            DeletePW(credentials);
            XmlSerializer serializer =new XmlSerializer(typeof(List<ConnectionCredentials>));// Serialize List of Connnection Credentials to XMLusing(FileStream stream = File.OpenWrite(Directory.GetCurrentDirectory()+@"\"+ fileName)){
                serializer.Serialize(stream, credentials);}}// Return the list of saved credentials from XML filepublic List<ConnectionCredentials> LoadCredentials(){
            List<ConnectionCredentials> credentials =new List<ConnectionCredentials>();if(VerifyIfFileExists(fileName)){
                XmlSerializer serializer =new XmlSerializer(typeof(List<ConnectionCredentials>));// Desirialize list of credentials from XML and cast to method return typeusing(FileStream stream = File.OpenRead(Directory.GetCurrentDirectory()+@"\"+ fileName)){
                    credentials =(List<ConnectionCredentials>)serializer.Deserialize(stream);}}return credentials;}// Create XML file if it doesn't already existprivatevoid CreateFileIfNeeded(){if(!VerifyIfFileExists(fileName)){
                XmlWriterSettings settings =new XmlWriterSettings();
                settings.Indent =true;using(XmlWriter writer = XmlWriter.Create(fileName, settings)){
                    writer.Dispose();}}}// Return true if file exists otherwise falseprivatebool VerifyIfFileExists(string fileName){string fullFilePath =string.Concat(Directory.GetCurrentDirectory(),@"\", fileName);return File.Exists(fullFilePath);}// We do not want to store PW so they will be deleted from credentials listprivatevoid DeletePW(List<ConnectionCredentials> credentials){
            credentials.ForEach(x => x.UserPassword =string.Empty);}// Name of the file that will store our dataprivateconststring fileName ="ucs.xml";}}

using AxMSTSCLib;using System.Collections.Generic;namespace RemoteDesktop{publicclass Validation{// Very simple Validation // it will look if all connection credentials are not empty// returns true if validation succeded otherwise falsepublicbool Validate(ConnectionCredentials credentials){if(string.IsNullOrWhiteSpace(credentials.ServerIP) ||string.IsNullOrWhiteSpace(credentials.UserName) ||string.IsNullOrWhiteSpace(credentials.UserPassword)){returnfalse;}returntrue;}// Validate if remote object is in connected statepublicbool ValidateConnection(AxMsTscAxNotSafeForScripting remote){return remote.Connected.ToString()=="1";}// Verify if credentials already exist in listpublicbool AreCredentialsDuplicate(ConnectionCredentials credentials,
                                            List<ConnectionCredentials> credentialsList){foreach(var item in credentialsList){if(credentials.ServerIP == item.ServerIP && credentials.UserName == item.UserName){returntrue;}}returnfalse;}}}