Exercise - BindEnables result

Your ShowRegions class should look like :

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using Firefly.Box;
using ENV;
using ENV.Data;

namespace Northwind.TestExercies
{
    public class ShowRegions : UIControllerBase
    {

        public readonly Models.Region Region = new Models.Region();

        public ShowRegions()
        {
            From = Region;
            Handlers.Add(System.Windows.Forms.Keys.F9,HandlerScope.CurrentTaskOnly).Invokes += e =>
            {
                System.Windows.Forms.MessageBox.Show("I am handling the F9 keyboard event!");
            };
            Handlers.Add(System.Windows.Forms.Keys.F10).Invokes += e =>
            {
                System.Windows.Forms.MessageBox.Show("I am handling the F10 keyboard event!");
            };
            Handlers.Add(System.Windows.Forms.Keys.F5, HandlerScope.CurrentTaskOnly).Invokes += e =>
            {
                Create<Customers.Exercises.IShowCustomerPerRegion>().Run(Region.RegionID);
                e.Handled = true;
            };
        }
 

        public void Run()
        {
            Execute();
        }

        protected override void OnLoad()
        {
            View = () => new Views.ShowRegionsView(this);
        }
    }
} 

After item 4 Your ShowRegions class should look like :

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using Firefly.Box;
using ENV;
using ENV.Data;

namespace Northwind.TestExercies
{
    public class ShowRegions : UIControllerBase
    {

        public readonly Models.Region Region = new Models.Region();

        public ShowRegions()
        {
            From = Region;
            Handlers.Add(System.Windows.Forms.Keys.F9,HandlerScope.CurrentTaskOnly).Invokes += e =>
            {
                System.Windows.Forms.MessageBox.Show("I am handling the F9 keyboard event!");
            };
            Handlers.Add(System.Windows.Forms.Keys.F10).Invokes += e =>
            {
                System.Windows.Forms.MessageBox.Show("I am handling the F10 keyboard event!");
            };
-           Handlers.Add(System.Windows.Forms.Keys.F5, HandlerScope.CurrentTaskOnly).Invokes += e =>
-           {
-               Create<Customers.Exercises.IShowCustomerPerRegion>().Run(Region.RegionID);
-               e.Handled = true;
-           };
            var hF5 = Handlers.Add(System.Windows.Forms.Keys.F5, HandlerScope.CurrentTaskOnly);
            hF5.Invokes += e =>
            {
                Create<Customers.Exercises.IShowCustomerPerRegion>().Run(Region.RegionID);
                e.Handled = true;
            };
            hF5.BindEnabled(() => Region.RegionID == 1);
        }
 

        public void Run()
        {
            Execute();
        }

        protected override void OnLoad()
        {
            View = () => new Views.ShowRegionsView(this);
        }
    }
} 

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