Universal Windows Platform – Playing Cards

Playing Cards demonstrates how to display some Playing Cards and to see if it’s possible to match a pair based on their face value

Step 1

If not already, follow Setup and Start on how to Install and get Started with Visual Studio 2017 or in Windows 10 choose Start, and then from the Start Menu find and select Visual Studio 2017.

vs2017

Step 2

Once Visual Studio Community 2017 has started, from the Menu choose File, then New then Project…

vs2017-file-new-project

Step 3

From New Project choose Visual C# from Installed, Templates then choose Blank App (Universal Windows) and then type in a Name and select a Location and then select Ok to create the Project
vs2017-new-project-window

Step 4

Then in New Universal Windows Project you need to select the Target Version this should be at least the Windows 10 Fall Creators Update (10.0; Build 16299) and the Minimum Version to be the same.

vs2017-target-platform

The Target Version will control what features your application can use in Windows 10 so by picking the most recent version you’ll be able to take advantage of those features. To make sure you always have the most recent version, in Visual Studio 2017 select Tools Extensions and Updates… then and then see if there are any Updates

Step 5

Once done select from the Menu, Project, then Add New Item…

vs2017-project-add-new-item

Step 6

From the Add New Item window select Visual C#, then Code from Installed then select Code File from the list, then type in the Name as Library.cs before selecting Add to add the file to the Project

vs2017-add-new-item-library

Step 7

Once in the Code View for Library.cs the following should be entered:

using System;
using System.Collections.Generic;
using Windows.Foundation;
using Windows.UI;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;

public class Library
{
    private const string app_title = "Playing Cards";
    private const string clubs = "♣";
    private const string diamonds = "♦";
    private const string hearts = "♥";
    private const string spades = "♠";
    private const string ace = "A";
    private const string jack = "J";
    private const string queen = "Q";
    private const string king = "K";
    private const int rows = 5;
    private const int columns = 3;

    private readonly string[] card_pips = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o" };
    private readonly string[] card_values = { "K", "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q" };
    private readonly List<string> face_value =  new List<string> { "A", "J", "Q", "K" };

    private readonly byte[][] table =
    {
                  // a, b, c, d, e, f, g, h, i, j, k, l, m, n, o
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, // K
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, // A
        new byte[] { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 }, // 2
        new byte[] { 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0 }, // 3
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1 }, // 4
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, // 5
        new byte[] { 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1 }, // 6
        new byte[] { 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1 }, // 7
        new byte[] { 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1 }, // 8
        new byte[] { 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1 }, // 9
        new byte[] { 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1 }, // 10
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, // J
        new byte[] { 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, // Q
        new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 0
    };

    private List<int> _deckOne = new List<int>();
    private List<int> _deckTwo = new List<int>();
    private int _cardOne, _cardTwo;
    private int _first, _second;
    private int _score, _counter;
    private Random _random = new Random((int)DateTime.Now.Ticks);

    public void Show(string content, string title)
    {
        IAsyncOperation<IUICommand> command = new MessageDialog(content, title).ShowAsync();
    }

    private List<int> Select()
    {
        int number;
        List<int> numbers = new List<int>();
        while ((numbers.Count < 53)) // Select 52 Numbers
        {
            number = _random.Next(1, 54); // Seeded Random Number
            if ((!numbers.Contains(number)) || (numbers.Count < 1))
            {
                numbers.Add(number); // Add if number Chosen or None
            }
        }
        return numbers;
    }

    private void Add(ref Grid grid, int row, int column, string content, byte opacity, string name)
    {
        TextBlock text = new TextBlock()
        {
            Name = name,
            FontSize = 25,
            FontFamily = new FontFamily("Arial"),
            Foreground = new SolidColorBrush(Colors.Black),
            Text = content,
            Opacity = opacity,
            HorizontalAlignment = HorizontalAlignment.Center
        };
        text.SetValue(Grid.ColumnProperty, column);
        text.SetValue(Grid.RowProperty, row);
        grid.Children.Add(text);
    }

    private void Card(ref Grid grid, string name, int value, Color back)
    {
        string suit = clubs;
        Grid card = new Grid()
        {
            Name = name,
            CornerRadius = new CornerRadius(5),
            BorderThickness = new Thickness(2),
            BorderBrush = new SolidColorBrush(Colors.Black),
            Background = new SolidColorBrush(back),
        };
        for (int column = 0; column < columns; column++)
        {
            card.ColumnDefinitions.Add(new ColumnDefinition() { });
        }
        for (int row = 0; row < rows; row++)
        {
            card.RowDefinitions.Add(new RowDefinition() { });
        }
        int count = 0;
        for (int row = 0; (row < rows); row++)
        {
            for (int column = 0; (column < columns); column++)
            {
                Add(ref card, row, column, suit, 
                    table[value][count], $"{name}.{card_pips[count]}");
                count++;
            }
        }
        grid.Children.Clear();
        grid.Children.Add(card);
    }

    private void SetPip(ref Grid grid, string suit, Color color, string name, int opacity)
    {
        TextBlock item = (TextBlock)grid.FindName(name);
        item.Text = suit;
        item.Foreground = new SolidColorBrush(color);
        item.Opacity = opacity;
    }

    private int SetCard(ref Grid grid, string name, int number)
    {
        int index = (number % 13);
        string suit = clubs;
        string face = clubs;
        switch (number)
        {
            case int c when (number >= 1 && number <= 13):
                suit = clubs;
                break;
            case int d when (number >= 14 && number <= 26):
                suit = diamonds;
                break;
            case int h when (number >= 27 && number <= 39):
                suit = hearts;
                break;
            case int s when (number >= 40 && number <= 52):
                suit = spades;
                break;
        }
        Color color = (suit == hearts || suit == diamonds) ? Colors.Red : Colors.Black;
        string value = card_values[index];
        face = face_value.Contains(value) ? value : suit;
        Grid card = (Grid)grid.FindName(name);
        card.Background = new SolidColorBrush(Colors.White);
        byte[] values = table[index];
        SetPip(ref card, suit, color, $"{name}.a", values[0]);
        SetPip(ref card, suit, color, $"{name}.b", values[1]);
        SetPip(ref card, suit, color, $"{name}.c", values[2]);
        SetPip(ref card, suit, color, $"{name}.d", values[3]);
        SetPip(ref card, suit, color, $"{name}.e", values[4]);
        SetPip(ref card, suit, color, $"{name}.f", values[5]);
        SetPip(ref card, suit, color, $"{name}.g", values[6]);
        SetPip(ref card, face, color, $"{name}.h", values[7]);
        SetPip(ref card, suit, color, $"{name}.i", values[8]);
        SetPip(ref card, suit, color, $"{name}.j", values[9]);
        SetPip(ref card, suit, color, $"{name}.k", values[10]);
        SetPip(ref card, suit, color, $"{name}.l", values[11]);
        SetPip(ref card, suit, color, $"{name}.m", values[12]);
        SetPip(ref card, suit, color, $"{name}.n", values[13]);
        SetPip(ref card, suit, color, $"{name}.o", values[14]);
        return index;
    }

    public void New(ref Grid deckOne, ref Grid deckTwo)
    {
        _score = 0;
        _counter = 0;
        _cardOne = 1;
        _cardTwo = 1;
        _deckOne = Select();
        _deckTwo = Select();
        Card(ref deckOne, "One", 13, Colors.Red);
        Card(ref deckTwo, "Two", 13, Colors.Blue);
    }

    public void Match(ref Grid deckOne, ref Grid deckTwo)
    {
        if (_deckOne != null && _deckTwo != null)
        {
            if ((_cardOne <= 52) && (_cardTwo <= 52))
            {
                _first = _deckOne[_cardOne];
                SetCard(ref deckOne, "One", _first);
                _cardOne++;
                _second = _deckTwo[_cardTwo];
                SetCard(ref deckTwo, "Two", _second);
                _cardTwo++;
                if ((_first % 13) == (_second % 13)) // Ignore Suite for Match
                {
                    _score++;
                    Show("Match!", app_title);
                }
                _counter++;
            }
            else
            {
                Show($"Game Over! Matched {_score} out of {_counter} cards!", app_title);
            }
        }
    }
}

In the Library.cs there are using statements to include the necessary functionality. There are also many const and readonly values to represent the suits of the playing cards plus a _table with all the positions of the pips that will represent the cards. There is a Select Method to randomise a deck of cards, Add and Card to create the layout of the face of a card. There’s a Match method to indicate that a pair of cards are the same along with a New Method to start a new selection of cards

Step 8

In the Solution Explorer select MainPage.xaml

vs2017-mainpage

Step 9

From the Menu choose View and then Designer

vs2017-view-designer

Step 10

The Design View will be displayed along with the XAML View and in this between the Grid and /Grid elements, enter the following XAML:

<Viewbox>
	<Grid Background="DarkGreen">
		<Grid.RowDefinitions>
			<RowDefinition Height="*"/>
			<RowDefinition Height="Auto"/>
			<RowDefinition Height="*"/>
		</Grid.RowDefinitions>
		<Grid.ColumnDefinitions>
			<ColumnDefinition Width="*"/>
			<ColumnDefinition Width="Auto"/>
			<ColumnDefinition Width="*"/>
			<ColumnDefinition Width="Auto"/>
			<ColumnDefinition Width="*"/>
		</Grid.ColumnDefinitions>
		<Grid Margin="50" Grid.Column="1" Grid.Row="1" Name="DeckOne" Height="140" Width="100" Tapped="DeckOne_Tapped"/>
		<Grid Margin="50" Grid.Column="3" Grid.Row="1" Name="DeckTwo" Height="140" Width="100" Tapped="DeckTwo_Tapped"/>
	</Grid>
</Viewbox>
<CommandBar VerticalAlignment="Bottom">
	<AppBarButton Name="New" Icon="Page2" Label="New" Click="New_Click"/>
</CommandBar>

The first block of XAML the main user interface of the Application, this features a Grid where the pairs of shapes to select will appear. The second block of XAML is is the CommandBar which contains the New – to begin a game

Step 11

From the Menu choose View and then Code

vs2017-view-code

Step 12

Once in the Code View, below the end of public MainPage() { … } the following Code should be entered:

Library library = new Library();

private void New_Click(object sender, RoutedEventArgs e)
{
	library.New(ref DeckOne, ref DeckTwo);
}

private void DeckOne_Tapped(object sender, RoutedEventArgs e)
{
	library.Match(ref DeckOne, ref DeckTwo);
}

private void DeckTwo_Tapped(object sender, RoutedEventArgs e)
{
	library.Match(ref DeckOne, ref DeckTwo);
}

Below the MainPage() Method an instance of the Library Class is created, then in the New_Click Event the New Method to display the Game in the Grid and start matching of cards

Step 13

That completes the Universal Windows Platform Application so Save the Project then in Visual Studio select the Local Machine to run the Application

vs2017-local-machine

Step 14

After the Application has started running you can then tap the New Button, then Tap on either of the decks to show a Card, match value in both decks to score a point, do this until all the cards have been displayed

ran-playing-cards

Step 15

To Exit the Application select the Close button in the top right of the Application

vs2017-close

Creative Commons License

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