public ActionResult Index()
        {
            if (DataSettingsHelper.DatabaseIsInstalled())
                return RedirectToRoute("HomePage");

            //set page timeout to 5 minutes
            this.Server.ScriptTimeout = 300;

            var model = new InstallModel
            {
                AdminEmail = "*****@*****.**",
                InstallSampleData = false,
                DatabaseConnectionString = "",
                DataProvider = "sqlserver",
                //fast installation service does not support SQL compact
                DisableSqlCompact = !String.IsNullOrEmpty(ConfigurationManager.AppSettings["UseFastInstallationService"]) &&
                    Convert.ToBoolean(ConfigurationManager.AppSettings["UseFastInstallationService"]),
                DisableSampleDataOption = !String.IsNullOrEmpty(ConfigurationManager.AppSettings["DisableSampleDataDuringInstallation"]) &&
                    Convert.ToBoolean(ConfigurationManager.AppSettings["DisableSampleDataDuringInstallation"]),
                SqlAuthenticationType = "sqlauthentication",
                SqlConnectionInfo = "sqlconnectioninfo_values",
                SqlServerCreateDatabase = false,
                UseCustomCollation = false,
                Collation = "SQL_Latin1_General_CP1_CI_AS",
            };
            foreach (var lang in _locService.GetAvailableLanguages())
            {
                model.AvailableLanguages.Add(new SelectListItem
                {
                    Value = Url.Action("ChangeLanguage", "Install", new { language = lang.Code }),
                    Text = lang.Name,
                    Selected = _locService.GetCurrentLanguage().Code == lang.Code,
                });
            }

            return View(model);
        }
        public ActionResult Index(InstallModel model)
        {
            if (DataSettingsHelper.DatabaseIsInstalled())
                return RedirectToRoute("HomePage");

            //set page timeout to 5 minutes
            this.Server.ScriptTimeout = 300;

            if (model.DatabaseConnectionString != null)
                model.DatabaseConnectionString = model.DatabaseConnectionString.Trim();

            //prepare language list
            foreach (var lang in _locService.GetAvailableLanguages())
            {
                model.AvailableLanguages.Add(new SelectListItem
                {
                    Value = Url.Action("ChangeLanguage", "Install", new { language = lang.Code }),
                    Text = lang.Name,
                    Selected = _locService.GetCurrentLanguage().Code == lang.Code,
                });
            }
            model.DisableSqlCompact = !String.IsNullOrEmpty(ConfigurationManager.AppSettings["UseFastInstallationService"]) &&
                Convert.ToBoolean(ConfigurationManager.AppSettings["UseFastInstallationService"]);
            model.DisableSampleDataOption = !String.IsNullOrEmpty(ConfigurationManager.AppSettings["DisableSampleDataDuringInstallation"]) &&
                Convert.ToBoolean(ConfigurationManager.AppSettings["DisableSampleDataDuringInstallation"]);

            //SQL Server
            if (model.DataProvider.Equals("sqlserver", StringComparison.InvariantCultureIgnoreCase))
            {
                if (model.SqlConnectionInfo.Equals("sqlconnectioninfo_raw", StringComparison.InvariantCultureIgnoreCase))
                {
                    //raw connection string
                    if (string.IsNullOrEmpty(model.DatabaseConnectionString))
                        ModelState.AddModelError("", _locService.GetResource("ConnectionStringRequired"));

                    try
                    {
                        //try to create connection string
                        new SqlConnectionStringBuilder(model.DatabaseConnectionString);
                    }
                    catch
                    {
                        ModelState.AddModelError("", _locService.GetResource("ConnectionStringWrongFormat"));
                    }
                }
                else
                {
                    //values
                    if (string.IsNullOrEmpty(model.SqlServerName))
                        ModelState.AddModelError("", _locService.GetResource("SqlServerNameRequired"));
                    if (string.IsNullOrEmpty(model.SqlDatabaseName))
                        ModelState.AddModelError("", _locService.GetResource("DatabaseNameRequired"));

                    //authentication type
                    if (model.SqlAuthenticationType.Equals("sqlauthentication", StringComparison.InvariantCultureIgnoreCase))
                    {
                        //SQL authentication
                        if (string.IsNullOrEmpty(model.SqlServerUsername))
                            ModelState.AddModelError("", _locService.GetResource("SqlServerUsernameRequired"));
                        if (string.IsNullOrEmpty(model.SqlServerPassword))
                            ModelState.AddModelError("", _locService.GetResource("SqlServerPasswordRequired"));
                    }
                }
            }

            //Consider granting access rights to the resource to the ASP.NET request identity.
            //ASP.NET has a base process identity
            //(typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6 and IIS 7,
            //and the configured application pool identity on IIS 7.5) that is used if the application is not impersonating.
            //If the application is impersonating via <identity impersonate="true"/>,
            //the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.
            var webHelper = EngineContext.Current.Resolve<IWebHelper>();
            //validate permissions
            var dirsToCheck = FilePermissionHelper.GetDirectoriesWrite(webHelper);
            foreach (string dir in dirsToCheck)
                if (!FilePermissionHelper.CheckPermissions(dir, false, true, true, false))
                    ModelState.AddModelError("", string.Format(_locService.GetResource("ConfigureDirectoryPermissions"), WindowsIdentity.GetCurrent().Name, dir));

            var filesToCheck = FilePermissionHelper.GetFilesWrite(webHelper);
            foreach (string file in filesToCheck)
                if (!FilePermissionHelper.CheckPermissions(file, false, true, true, true))
                    ModelState.AddModelError("", string.Format(_locService.GetResource("ConfigureFilePermissions"), WindowsIdentity.GetCurrent().Name, file));

            if (ModelState.IsValid)
            {
                var settingsManager = new DataSettingsManager();
                try
                {
                    string connectionString;
                    if (model.DataProvider.Equals("sqlserver", StringComparison.InvariantCultureIgnoreCase))
                    {
                        //SQL Server

                        if (model.SqlConnectionInfo.Equals("sqlconnectioninfo_raw", StringComparison.InvariantCultureIgnoreCase))
                        {
                            //raw connection string

                            //we know that MARS option is required when using Entity Framework
                            //let's ensure that it's specified
                            var sqlCsb = new SqlConnectionStringBuilder(model.DatabaseConnectionString);
                            if (this.UseMars)
                            {
                                sqlCsb.MultipleActiveResultSets = true;
                            }
                            connectionString = sqlCsb.ToString();
                        }
                        else
                        {
                            //values
                            connectionString = CreateConnectionString(model.SqlAuthenticationType == "windowsauthentication",
                                model.SqlServerName, model.SqlDatabaseName,
                                model.SqlServerUsername, model.SqlServerPassword);
                        }

                        if (model.SqlServerCreateDatabase)
                        {
                            if (!SqlServerDatabaseExists(connectionString))
                            {
                                //create database
                                var collation = model.UseCustomCollation ? model.Collation : "";
                                var errorCreatingDatabase = CreateDatabase(connectionString, collation);
                                if (!String.IsNullOrEmpty(errorCreatingDatabase))
                                    throw new Exception(errorCreatingDatabase);

                                //Database cannot be created sometimes. Weird! Seems to be Entity Framework issue
                                //that's just wait 3 seconds
                                Thread.Sleep(3000);
                            }
                        }
                        else
                        {
                            //check whether database exists
                            if (!SqlServerDatabaseExists(connectionString))
                                throw new Exception(_locService.GetResource("DatabaseNotExists"));
                        }
                    }
                    else
                    {
                        //SQL CE
                        string databaseFileName = "Muh.Db.sdf";
                        string databasePath = @"|DataDirectory|\" + databaseFileName;
                        connectionString = "Data Source=" + databasePath + ";Persist Security Info=False";

                        //drop database if exists
                        string databaseFullPath = HostingEnvironment.MapPath("~/App_Data/") + databaseFileName;
                        if (System.IO.File.Exists(databaseFullPath))
                        {
                            System.IO.File.Delete(databaseFullPath);
                        }
                    }

                    //save settings
                    var dataProvider = model.DataProvider;
                    var settings = new DataSettings
                    {
                        DataProvider = dataProvider,
                        DataConnectionString = connectionString
                    };
                    settingsManager.SaveSettings(settings);

                    //init data provider
                    var dataProviderInstance = EngineContext.Current.Resolve<BaseDataProviderManager>().LoadDataProvider();
                    dataProviderInstance.InitDatabase();

                    //now resolve installation service
                    var installationService = EngineContext.Current.Resolve<IInstallationService>();
                    installationService.InstallData(model.AdminEmail, model.AdminPassword, model.InstallSampleData);

                    //reset cache
                    DataSettingsHelper.ResetCache();

                    //TODO:Muh_plugin yok şimdilik
                    //install plugins
                    //PluginManager.MarkAllPluginsAsUninstalled();
                    //var pluginFinder = EngineContext.Current.Resolve<IPluginFinder>();
                    //var plugins = pluginFinder.GetPlugins<IPlugin>(LoadPluginsMode.All)
                    //    .ToList()
                    //    .OrderBy(x => x.PluginDescriptor.Group)
                    //    .ThenBy(x => x.PluginDescriptor.DisplayOrder)
                    //    .ToList();
                    //var pluginsIgnoredDuringInstallation = String.IsNullOrEmpty(ConfigurationManager.AppSettings["PluginsIgnoredDuringInstallation"]) ?
                    //    new List<string>() :
                    //    ConfigurationManager.AppSettings["PluginsIgnoredDuringInstallation"]
                    //        .Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
                    //        .Select(x => x.Trim())
                    //        .ToList();
                    //foreach (var plugin in plugins)
                    //{
                    //    if (pluginsIgnoredDuringInstallation.Contains(plugin.PluginDescriptor.SystemName))
                    //        continue;
                    //    plugin.Install();
                    //}

                    //register default permissions
                    //var permissionProviders = EngineContext.Current.Resolve<ITypeFinder>().FindClassesOfType<IPermissionProvider>();
                    var permissionProviders = new List<Type>();
                    permissionProviders.Add(typeof(StandardPermissionProvider));
                    foreach (var providerType in permissionProviders)
                    {
                        dynamic provider = Activator.CreateInstance(providerType);
                        EngineContext.Current.Resolve<IPermissionService>().InstallPermissions(provider);
                    }

                    //restart application
                    webHelper.RestartAppDomain();

                    //Redirect to home page
                    return RedirectToRoute("HomePage");
                }
                catch (Exception exception)
                {
                    //reset cache
                    DataSettingsHelper.ResetCache();

                    //clear provider settings if something got wrong
                    settingsManager.SaveSettings(new DataSettings
                    {
                        DataProvider = null,
                        DataConnectionString = null
                    });

                    ModelState.AddModelError("", string.Format(_locService.GetResource("SetupFailed"), exception.Message));
                }
            }
            return View(model);
        }