1 <Application x:Class="RealMef.App"
2              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4              StartupUri="MainWindow.xaml">
5     <Application.Resources>
6 
7     </Application.Resources>
8 </Application>

1   /// <summary>
2   /// Interaction logic for App.xaml
3   /// </summary>
4   public partial class App : Application
5   {
6   }

 1 <Window x:Class="RealMef.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         Title="MainWindow" Height="531" Width="979">
 5   <Grid>
 6     <Grid.RowDefinitions>
 7       <RowDefinition Height="20"/>
 8       <RowDefinition Height="*"/>
 9     </Grid.RowDefinitions>
10     <Grid.ColumnDefinitions>
11       <ColumnDefinition Width=".40*"/>
12       <ColumnDefinition Width="200"/>
13       <ColumnDefinition Width=".40*"/>
14     </Grid.ColumnDefinitions>
15 
16     <StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal">
17       <TextBlock Name="txtGeneratorType" HorizontalAlignment="Left"/>
18       <Button Name="btnGenerate" Click="btnGenerate_Click" HorizontalAlignment="Right">Generate Source Data</Button>
19     </StackPanel>
20     <TextBox Grid.Row="1" Grid.Column="0" Name="txtSourceData" TextWrapping="Wrap"/>
21     <StackPanel Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" Margin="5,0">
22       <ComboBox Name="cbTransformationOptions"/>
23       <Button Name="btnTransform" Click="btnTransform_Click">Transform</Button>
24       <Button Name="btnClear" Click="btnClear_Click">Clear Boxes</Button>
25     </StackPanel>
26     <TextBlock Grid.Row="1" Grid.Column="2" Name="txtDestinationData" TextWrapping="Wrap" Background="LightGray" Foreground="Blue"/>
27   </Grid>
28 </Window>

 1   /// <summary>
 2   /// Interaction logic for MainWindow.xaml
 3   /// </summary>
 4   public partial class MainWindow : Window
 5   {
 6     private readonly TranformationEngine _tranformationEngine;
 7     public MainWindow()
 8     {
 9       //  bootstrap MEF
10       //  search the named assembly
11       //using (var catalog = new AssemblyCatalog(Assembly.LoadFile(System.IO.Path.GetFullPath("TransformationImplementation.dll"))))
12       //  search the directory
13       using (var catalog = new DirectoryCatalog("."))
14       {
15         var container = new CompositionContainer(catalog);
16         _tranformationEngine = new TranformationEngine();
17         container.SatisfyImportsOnce(_tranformationEngine);
18       }
19 
20       InitializeComponent();
21 
22       txtGeneratorType.Text = _tranformationEngine.Generator.Name;
23       cbTransformationOptions.ItemsSource = _tranformationEngine.Transformers;
24       cbTransformationOptions.DisplayMemberPath = "Name";
25       cbTransformationOptions.SelectedIndex = 0;
26     }
27 
28     private void btnGenerate_Click(object sender, RoutedEventArgs e)
29     {
30       txtSourceData.Text = _tranformationEngine.Generator.Generate();
31     }
32 
33     private void btnClear_Click(object sender, RoutedEventArgs e)
34     {
35       txtSourceData.Text = txtDestinationData.Text = string.Empty;
36     }
37 
38     private void btnTransform_Click(object sender, RoutedEventArgs e)
39     {
40       var transformer = cbTransformationOptions.SelectedItem as ITransformer;
41       if (transformer != null)
42       {
43         txtDestinationData.Text = transformer.Transform(txtSourceData.Text);
44       }
45     }
46   }

1   [InheritedExport(typeof(IGenerator))]
2   public interface IGenerator
3   {
4     string Name { get; }
5     string Generate();
6   }

1   [InheritedExport(typeof(ITransformer))]
2   public interface ITransformer
3   {
4     string Name { get; }
5     string Transform(string text);
6   }

1 public class TranformationEngine
2 {
3   [Import(typeof(IGenerator))]
4   public IGenerator Generator { get; set; }
5   [ImportMany(typeof(ITransformer))]
6   public IEnumerable<ITransformer> Transformers { get; set; }
7 }

 1 public class LoremIpsumGenerator : IGenerator
 2 {
 3   #region Implementation of IGenerator
 4   public string Name
 5   {
 6     get { return "Lorem Ipsum"; }
 7   }
 8   public string Generate()
 9   {
10     return "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin a metus commodo quam tincidunt imperdiet. Praesent quis consectetur nulla. Cras interdum imperdiet posuere. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Donec hendrerit, erat et sollicitudin elementum, mi nulla aliquet nulla, ac fringilla nibh velit eget ipsum. Vivamus eget mi sed lacus ultrices convallis. Suspendisse fringilla pellentesque eros, at ultricies metus ultricies sed. Proin dolor dui, ultricies et blandit sit amet, gravida et purus. Proin magna dui, egestas ac imperdiet non, convallis sed nisi. Proin adipiscing hendrerit tortor commodo porta. Integer ullamcorper leo non odio condimentum ut sodales quam pellentesque. Phasellus quis quam quis enim pretium varius ac sit amet tellus. Donec dolor justo, tempor non pulvinar a, feugiat sed risus. Sed eget metus mauris." +
11            "Curabitur id pulvinar massa. Nam vel risus lectus, ut adipiscing quam. Mauris tincidunt massa in purus sagittis ullamcorper. Suspendisse posuere aliquam dolor ac posuere. Nulla interdum, erat a rutrum laoreet, purus neque rhoncus tellus, aliquam faucibus lacus justo eu ipsum. Vivamus bibendum est quis felis tempor ut convallis augue ultrices. Proin interdum fringilla sapien, nec tincidunt orci tempus sed. Integer eros dolor, fringilla id dictum at, adipiscing id purus. Vestibulum ullamcorper turpis quis massa feugiat non pharetra leo tempus. Cras et felis viverra nibh aliquet dapibus ac id ipsum." +
12            "Maecenas suscipit, leo ac cursus imperdiet, massa augue tincidunt purus, vel lacinia justo est id diam. Sed venenatis nisl non nibh vehicula id gravida metus imperdiet. Fusce euismod, eros et euismod ultricies, ipsum sem dapibus lacus, id ultricies nibh lacus porta est. Sed molestie fringilla metus vitae egestas. Vivamus at augue nibh, id volutpat nibh. Mauris tempus dapibus elementum. Sed volutpat aliquet augue id pretium. Donec consectetur eros id odio interdum lacinia. Suspendisse vitae lectus a sapien rhoncus varius vel consectetur tortor. Aenean id luctus libero. Praesent velit justo, tristique ac ultrices in, sollicitudin eu orci. Sed ornare ante sed libero volutpat tempus. Etiam vitae eros eu leo egestas sollicitudin. Integer pharetra interdum massa non condimentum. Sed augue sapien, eleifend sed ullamcorper id, elementum eget justo. Sed dignissim dictum tortor, quis feugiat lorem aliquet ac. Quisque vel elit ut libero sollicitudin accumsan. Aliquam bibendum sapien vitae tortor dapibus cursus non vitae nulla." +
13            "Cras semper fringilla odio id posuere. Duis nulla enim, gravida quis malesuada id, sollicitudin quis nisl. Curabitur tortor risus, iaculis a rhoncus sed, condimentum in ligula. Maecenas et magna in orci pulvinar euismod eu et odio. Cras sed tortor orci. Suspendisse porta neque vel purus eleifend rutrum. Pellentesque vel magna ac metus pulvinar tincidunt eu quis nunc. Vestibulum ligula purus, iaculis quis blandit ac, sodales et urna. Duis sodales ipsum quis magna vehicula non ornare lacus fringilla. Nulla neque erat, adipiscing at convallis sed, sodales eu ante. Curabitur quis aliquet mauris. Aliquam gravida augue et elit convallis a lobortis dui laoreet. Sed porta turpis vitae neque consequat at lacinia nibh pretium. Morbi pellentesque nulla id mauris consectetur ut malesuada mi viverra. Suspendisse vulputate lacinia imperdiet. Sed ultrices condimentum justo viverra condimentum. Morbi odio massa, convallis et sollicitudin vitae, fermentum eu magna. Nulla malesuada turpis a nisi semper sollicitudin. Morbi sed est lectus. Morbi auctor mollis pharetra." +
14            "Proin eleifend aliquam leo, quis vulputate tortor faucibus ac. Cras lobortis lacus felis. Curabitur eu erat nec odio euismod faucibus. Ut ut tortor turpis. Donec mattis posuere ipsum, a eleifend purus cursus ut. Suspendisse faucibus facilisis porta. Nulla id nulla sed quam placerat tincidunt. Phasellus elementum nulla ac ante feugiat varius. Aliquam eleifend, tellus in congue interdum, ipsum est porta lectus, ac ullamcorper magna nibh et tellus. Suspendisse eget tortor et ipsum vestibulum lacinia. Quisque sed leo nisl. Cras hendrerit, neque dictum suscipit fringilla, orci velit sollicitudin leo, in tincidunt tellus dolor eu purus. Nulla quis lacus ac diam tempus dapibus.";
15   }
16   #endregion
17 }

 1   public class LowerCaseTransformer : ITransformer
 2   {
 3     #region Implementation of ITransformer
 4     public string Name
 5     {
 6       get { return "Lower Case Transformer"; }
 7     }
 8     public string Transform(string text)
 9     {
10       return text.ToLower();
11     }
12     #endregion
13   }

 1   public class UpperCaseTransformer : ITransformer
 2   {
 3     #region Implementation of ITransformer
 4     public string Name
 5     {
 6       get { return "Upper Case Transformer"; }
 7     }
 8     public string Transform(string text)
 9     {
10       return text.ToUpper();
11     }
12     #endregion
13   }

 1   public class ReverseTransformer : ITransformer
 2   {
 3     #region Implementation of ITransformer
 4     public string Name
 5     {
 6       get { return "Reverse Transformer"; }
 7     }
 8     public string Transform(string text)
 9     {
10       return new string(text.Reverse().ToArray());
11     }
12     #endregion
13   }

 1 [Export("StarWars", typeof(IGenerator))]
 2 public class StarWarsTextGenerator : IGenerator
 3 {
 4   #region Implementation of IGenerator
 5   public string Name
 6   {
 7     get { return "Star Wars Text Generator"; }
 8   }
 9   public string Generate()
10   {
11     return
12       "Don't underestimate the Force. I suggest you try it again, Luke. This time, let go your conscious self and act on instinct. Look, I can take you as far as Anchorhead. You can get a transport there to Mos Eisley or wherever you're going. Partially, but it also obeys your commands. No! Alderaan is peaceful. We have no weapons. You can't possibly" +
13       "You're all clear, kid. Let's blow this thing and go home! I find your lack of faith disturbing. The more you tighten your grip, Tarkin, the more star systems will slip through your fingers. What?! As you wish. I care. So, what do you think of her, Han?" +
14       "Hey, Luke! May the Force be with you. Obi-Wan is here. The Force is with him. I can't get involved! I've got work to do! It's not that I like the Empire, I hate it, but there's nothing I can do about it right now. It's such a long way from here. I have traced the Rebel spies to her. Now she is my only link to finding their secret base." +
15       "I'm surprised you had the courage to take the responsibility yourself. The Force is strong with this one. I have you now. But with the blast shield down, I can't even see! How am I supposed to fight? Ye-ha! Still, she's got a lot of spirit. I don't know, what do you think? Dantooine. They're on Dantooine." +
16       "I don't know what you're talking about. I am a member of the Imperial Senate on a diplomatic mission to Alderaan-- I need your help, Luke. She needs your help. I'm getting too old for this sort of thing. Oh God, my uncle. How am I ever gonna explain this? I call it luck. Remember, a Jedi can feel the Force flowing through him.";
17   }
18   #endregion
19 }