How to enable the textbox via c# code back end logic?

Hi team

I want to enable textbox when its an admin and super user, here is my logic and its not working.

public MainWindow()
{
    try
    {
        InitializeComponent();

        if (System.Deployment.Application.ApplicationDeployment.IsNetworkDeployed)
        {
            lblPath.Content = System.Deployment.Application.ApplicationDeployment.CurrentDeployment.UpdateLocation.AbsolutePath;
        }

        dispatcherTimer = new DispatcherTimer();
        dispatcherTimer.Tick += dispatcherTimer_Tick;
        dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 1);
        dispatcherTimer.Start();
        panelWidth = sidepanel1.Width;
        panelWidth = sidePanel.Width;
        
        User user = new User();
        LabAssistant user1 = new LabAssistant();

        if (Properties.Settings.Default.Quality == "Q")
        {
            user1 = Managers.ManageLabAssistant.GetUserByPK(Properties.Settings.Default.LoggedInUserID);
            txtLoggedInUser.Text = user1.UserName;
        }
        else
        {
            user = Managers.UserManager.GetUserByPK(Properties.Settings.Default.LoggedInUserID);
            txtLoggedInUser.Text = user.Username;
        }

        txtStation.Text = Properties.Settings.Default.Station;

        if (System.Deployment.Application.ApplicationDeployment.IsNetworkDeployed)
        {
            this.txtVersion.Text = System.Deployment.Application.ApplicationDeployment.CurrentDeployment.CurrentVersion.ToString();
        }

        var menuWB = new List();
        menuWB.Add(new SubItem("Raw Material", new UCRaw_Material()));
        menuWB.Add(new SubItem("Finished Product", new UCFinishedProduct()));
        var item0 = new ItemMenu("Weighbridge", menuWB, PackIconKind.Truck);
        
       
        //var menuSchedule = new List();
        //var item1 = new ItemMenu("Finished Product", menuSchedule, PackIconKind.TruckDelivery);

        var menuReports = new List();
        menuReports.Add(new SubItem("Customer", new UCManageCustomer()));
        menuReports.Add(new SubItem("Client", new UCManageClients()));
        menuReports.Add(new SubItem("Bin", new UCManageBin()));
        menuReports.Add(new SubItem("Drivers", new UCManageDriver()));
        menuReports.Add(new SubItem("Farm", new UCManageFarm()));
        menuReports.Add(new SubItem("Material", new UCManageMaterial()));
        menuReports.Add(new SubItem("Product", new UCManageProduct()));
        menuReports.Add(new SubItem("Supplier", new UCManageSupplier()));
        menuReports.Add(new SubItem("Vehicle", new UCManageVehicle()));
        menuReports.Add(new SubItem("Batch Material", new UCManageBatchMaterial()));
        menuReports.Add(new SubItem("Feed Production Schedule", new UCFeedproductionSchedule()));
        menuReports.Add(new SubItem("Feed Production Requirements", new UCOrderRequirements()));

        menuReports.Add(new SubItem("Batch Feed Format", new UCManageBatchFeedFormat()));
      //  menuReports.Add(new SubItem("Users", new UCManageUsers()));

        //menuReports.Add(new SubItem("RM Code to Stock Code", new UCManageRM_Stock()));
        menuReports.Add(new SubItem("Status", new UCStatusScreen()));
        menuReports.Add(new SubItem("Recipes", new UCManageRecipe()));
        menuReports.Add(new SubItem("Batch Recipes", new UCManageBatchRecipe()));
        menuReports.Add(new SubItem("Configuration", new UCConfigScreen()));
        // menuReports.Add(new SubItem("Scale Settings", new UCScaleSettings()));
        menuReports.Add(new SubItem("Reports", new UCManageReports()));
        var item2 = new ItemMenu("Administration", menuReports, PackIconKind.AccountCog);


        var menuQC = new List();
        menuQC.Add(new SubItem("Crumble", new UCManageQcCrumbleData()));
        menuQC.Add(new SubItem("Pellet", new UCManagePelletData()));
        menuQC.Add(new SubItem("Grist", new UCManageGrist()));
        //       menuQC.Add(new SubItem("Users", new UCLabAssistant())); 
        menuQC.Add(new SubItem("Reports", new UCQualityReports()));
      

        var item3 = new ItemMenu("Quality Control", menuQC, PackIconKind.Controller);




        if (user.UserTypeID == Convert.ToInt32(Enum.UserType.Admin))
        {
            Menu.Children.Add(new UserControlMenuItem(item0, this));
            Menu.Children.Add(new UserControlMenuItem(item2, this));
            Menu.Children.Add(new UserControlMenuItem(item3, this));
            menuQC.Add(new SubItem("Users", new UCLabAssistant()));
            menuQC.Add(new SubItem("Supervisor", new UCQCManageSupervisor()));
            menuWB.Add(new SubItem("Reports", new UCManageSupervisorReports()));
            txtWeighbridgeWeight.IsEnabled = true; // this not working

        }
        if(user.UserTypeID == Convert.ToInt32(Enum.UserType.Admin))
        {
            txtWeighbridgeWeight.IsEnabled = true;// this is not working, cant edit any value when page is loaded as an admin and Super-User
            txtWeighbridgeWeight.IsReadOnly = false;
        }
        
        if (user.UserTypeID == Convert.ToInt32(Enum.UserType.SuperUser))
        {
            Menu.Children.Add(new UserControlMenuItem(item0, this));
            Menu.Children.Add(new UserControlMenuItem(item2, this));
            Menu.Children.Add(new UserControlMenuItem(item3, this));
            menuReports.Add(new SubItem("Users", new UCManageUsers()));
            menuQC.Add(new SubItem("Users", new UCLabAssistant()));
            menuQC.Add(new SubItem("Supervisor", new UCQCManageSupervisor()));
            menuWB.Add(new SubItem("Reports", new UCManageSupervisorReports()));
            txtWeighbridgeWeight.IsEnabled = true;
            
            

        } if(user.UserTypeID == Convert.ToInt32(Enum.UserType.SuperUser))
        {
            txtWeighbridgeWeight.IsEnabled = true;
        }

        if (user.UserTypeID == Convert.ToInt32(Enum.UserType.User))
        {
            Menu.Children.Add(new UserControlMenuItem(item0, this));
        }
        

        if (user.UserTypeID == Convert.ToInt32(Enum.UserType.Supervisor))
        {
            Menu.Children.Add(new UserControlMenuItem(item0, this));
            menuWB.Add(new SubItem("Reports", new UCManageSupervisorReports()));
        }

        // inventory controller logic implemented
        if(user.UserTypeID == Convert.ToInt32(Enum.UserType.InventController))
        {
            Menu.Children.Add(new UserControlMenuItem(item0, this));
            menuWB.Add(new SubItem("Reports", new UCManageReports())); 
        }
        else
        {
            txtWeighbridgeWeight.IsReadOnly = true;
        }

        if (user1.UserLevelID == Convert.ToInt32(Enum.UserType.Admin))
        {
           // Menu.Children.Add(new UserControlMenuItem(item0, this));
           // Menu.Children.Add(new UserControlMenuItem(item2, this));
            Menu.Children.Add(new UserControlMenuItem(item3, this));
            menuQC.Add(new SubItem("Users", new UCLabAssistant()));
           
        }
        else
        {
         
            // txtWeighbridgeWeight.IsReadOnly = true;
        }
        if (user1.UserLevelID == Convert.ToInt32(Enum.UserType.User))
        {
            Menu.Children.Add(new UserControlMenuItem(item3, this));

        }
        else
        {
            txtWeighbridgeWeight.IsReadOnly = true;
        }

        if (user.UserTypeID == Convert.ToInt32(Enum.UserType.Admin) || user.UserTypeID == Convert.ToInt32(Enum.UserType.User)|| user.UserTypeID == Convert.ToInt32(Enum.UserType.Supervisor) || user.UserTypeID == Convert.ToInt32(Enum.UserType.SuperUser) || user.UserTypeID == Convert.ToInt32(Enum.UserType.InventController))
        {
            if (Properties.Settings.Default.Station.ToUpper() != "BOTTOM")
            {
                UCRaw_Material uc = new UCRaw_Material();

                SwitchScreen(uc);
            }
            else
            {
                UCFinishedProduct uc = new UCFinishedProduct();
                SwitchScreen(uc);
            }
        }
        if (user1.UserLevelID == Convert.ToInt32(Enum.UserType.Admin) || user1.UserLevelID == Convert.ToInt32(Enum.UserType.User))
        {
            if (Properties.Settings.Default.Station.ToUpper() != "BOTTOM")
            {
                UCManageQcCrumbleData uc = new UCManageQcCrumbleData();
                SwitchScreen(uc);
            }
            else
            {
                UCManagePelletData uc = new UCManagePelletData();
                SwitchScreen(uc);
            }
        }

        //UCManageRecipe uc = new UCManageRecipe();
        //SwitchScreen(uc);
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message + "/n" + ex.InnerException);
    }
}