Adding CustomComboBox project to the Sample Applications (microsoft#52)

Sample Applications/CustomComboBox/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>

Sample Applications/CustomComboBox/App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace CustomComboBox
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

Sample Applications/CustomComboBox/Converters/StringToStringAndColorConverter.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace CustomComboBox.Converters
+{
+    class StringToStringAndColorConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            switch (parameter)
+            {
+                case "text":
+                    return (value == null) ? "No movie selected!" : "Streaming.. ";
+                case "color":
+                    return (value == null) ? "Red" : "Green";
+                default:
+                    return null;
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

Sample Applications/CustomComboBox/CustomComboBox.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{9E3EECAF-86CF-45CB-8ABB-01A850A308F0}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>CustomComboBox</RootNamespace>
+    <AssemblyName>CustomComboBox</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <WarningLevel>4</WarningLevel>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xaml">
+      <RequiredTargetFramework>4.0</RequiredTargetFramework>
+    </Reference>
+    <Reference Include="WindowsBase" />
+    <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
+  </ItemGroup>
+  <ItemGroup>
+    <ApplicationDefinition Include="App.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </ApplicationDefinition>
+    <Page Include="MainWindow.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+    <Compile Include="App.xaml.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="Converters\StringToStringAndColorConverter.cs" />
+    <Compile Include="DropList.cs" />
+    <Compile Include="MainWindow.xaml.cs">
+      <DependentUpon>MainWindow.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainWindowViewModel.cs" />
+    <Compile Include="Movie.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

Sample Applications/CustomComboBox/DropList.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace CustomComboBox
+{
+    class DropList : ContentControl
+    {
+        public ICommand Command
+        {
+            get { return (ICommand)GetValue(CommandProperty); }
+            set { SetValue(CommandProperty, value); }
+        }
+
+        public static readonly DependencyProperty CommandProperty =
+            DependencyProperty.Register("Command", typeof(ICommand), typeof(DropList), new PropertyMetadata(null));
+
+        public object CommandParameter
+        {
+            get { return GetValue(CommandParameterProperty); }
+            set { SetValue(CommandParameterProperty, value); }
+        }
+
+        public static readonly DependencyProperty CommandParameterProperty =
+            DependencyProperty.Register("CommandParameter", typeof(object), typeof(DropList), new PropertyMetadata(null));
+
+        public string SubTitle
+        {
+            get { return (string)GetValue(SubTitleProperty); }
+            set { SetValue(SubTitleProperty, value); }
+        }
+
+        public static readonly DependencyProperty SubTitleProperty =
+            DependencyProperty.Register("SubTitle", typeof(string), typeof(DropList));
+
+        public string DynamicText
+        {
+            get { return (string)GetValue(DynamicTextProperty); }
+            set { SetValue(DynamicTextProperty, value); }
+        }
+
+        public static readonly DependencyProperty DynamicTextProperty =
+            DependencyProperty.Register("DynamicText", typeof(string), typeof(DropList));
+
+
+        public IEnumerable<object> ItemsSource
+        {
+            get { return (IEnumerable<object>)GetValue(ItemsSourceProperty); }
+            set { SetValue(ItemsSourceProperty, value); }
+        }
+
+        public static readonly DependencyProperty ItemsSourceProperty =
+            DependencyProperty.Register("ItemsSource", typeof(IEnumerable<object>), typeof(DropList));
+
+
+        public string DisplayMemberPath
+        {
+            get { return (string)GetValue(DisplayMemberPathProperty); }
+            set { SetValue(DisplayMemberPathProperty, value); }
+        }
+
+        public static readonly DependencyProperty DisplayMemberPathProperty =
+            DependencyProperty.Register("DisplayMemberPath", typeof(string), typeof(DropList), new PropertyMetadata(null));
+
+    }
+}

Sample Applications/CustomComboBox/MainWindow.xaml

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+<Window x:Class="CustomComboBox.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:CustomComboBox"
+        xmlns:converters="clr-namespace:CustomComboBox.Converters"
+        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
+        Title="MainWindow" Height="350" Width="525">
+    <Window.DataContext>
+        <local:MainWindowViewModel/>
+    </Window.DataContext>
+    <Window.Resources>
+        <converters:StringToStringAndColorConverter x:Key="stringConverter"/>
+    </Window.Resources>
+    <Grid>
+        <local:DropList Content="Watch Now" SubTitle="Movie: "
+                             FontWeight="Bold"
+                             HorizontalAlignment="Center" VerticalAlignment="Top"
+                             Style="{StaticResource DropListStyle}" 
+                             ItemsSource="{Binding Movies}" Command="{Binding OnWatchNow}" 
+                             DisplayMemberPath="Title"/>
+
+        <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
+            <TextBlock FontWeight="Bold" HorizontalAlignment="Left"
+                       Text="{Binding SelectedMovie, Converter={StaticResource stringConverter}, ConverterParameter=text}" 
+                       Foreground="{Binding SelectedMovie, Converter={StaticResource stringConverter}, ConverterParameter=color}"/>
+            <TextBlock Text="{Binding SelectedMovie}" HorizontalAlignment="Center" />
+
+        </StackPanel>
+    </Grid>
+</Window>

Sample Applications/CustomComboBox/MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace CustomComboBox
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+        }
+    }
+}

Sample Applications/CustomComboBox/MainWindowViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Windows.Input;
+
+namespace CustomComboBox
+{
+    class MainWindowViewModel : INotifyPropertyChanged
+    {
+        public MainWindowViewModel()
+        {
+            Movies2 = new List<string>
+            {
+                "Movie1",
+                "Movie2",
+                "Movie3",
+                "Movie4",
+                "Movie5",
+                "Movie6"
+            };
+            Movies = new List<Movie>
+            {
+                new Movie{Id=1, Title="The Dark Knight" },
+                new Movie{Id=2, Title="The Big Lebowski" },
+                new Movie{Id=3, Title="The Shawshank Redemption" },
+                new Movie{Id=4, Title="Schindler's List" },
+                new Movie{Id=5, Title="Pulp Fiction" },
+                new Movie{Id=6, Title="Fight Club" }
+            };
+
+            OnWatchNow = new WatchNowCommand(ShowMovie);
+        }
+
+        private void ShowMovie(object parameter)
+        {
+            if (parameter != null)
+            {
+
+                if (parameter is string s)
+                    SelectedMovie = s;
+                else if (parameter is Movie m)
+                    SelectedMovie = m.Title;
+            }
+        }
+
+        public List<Movie> Movies { get; set; }
+        public List<string> Movies2 { get; set; }
+        public event PropertyChangedEventHandler PropertyChanged = delegate { };
+        public ICommand OnWatchNow { get; set; }
+        string selectedMovie;
+        public string SelectedMovie
+        {
+            get { return selectedMovie; }
+            set
+            {
+                selectedMovie = value;
+                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(SelectedMovie)));
+            }
+        }
+    }
+
+    public class WatchNowCommand : ICommand
+    {
+        Action<object> _execute;
+        public WatchNowCommand(Action<object> execute)
+        {
+            _execute = execute;
+        }
+        public event EventHandler CanExecuteChanged;
+
+        public bool CanExecute(object parameter) => true;
+
+        public void Execute(object parameter) =>
+            _execute(parameter);
+
+    }
+}

Sample Applications/CustomComboBox/Movie.cs

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+namespace CustomComboBox
+{
+    class Movie
+    {
+        public string Title { get; set; }
+        public int Id { get; set; }
+    }
+}