VS2012 Xaml C＃名称空间中不存在该名称

Question

I'm trying to do this simple tutorial and I'm upto the second part: http://msdn.microsoft.com/en-us/library/cc265158(v=vs.95).aspx

(In my code I've just replaced Customer with Game

but I keep getting the errors: The name "Games" does not exist in the namespace

"clr-namespace:GameLauncher". Unknown type 'Games' in XML namespace 'clr-namespace:GameLauncher;assembly=GameLauncher, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

My code for the XAML is:

<Page
x:Class="GameLauncher.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:GameLauncher"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:src="clr-namespace:GameLauncher"
mc:Ignorable="d">

<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
    <Grid.Resources>
        <src:Games x:Key="games"/>
    </Grid.Resources>
    <ListBox HorizontalAlignment="Left" Height="{Binding ElementName=LayoutRoot, Path=ActualHeight}" Margin="50,50,0,50" VerticalAlignment="Stretch" Width="300"/>
</Grid>

and my C# code is:

namespace GameLauncher
{

public class Game
{
    public String FirstName { get; set; }
    public String LastName { get; set; }
    public String Address { get; set; }

    public Game(String firstName, String lastName, String address)
    {
        this.FirstName = firstName;
        this.LastName = lastName;
        this.Address = address;
    }

}

public class Games : ObservableCollection<Game>
{
    public Games()
    {
        Add(new Game("Michael", "Anderberg",
                "12 North Third Street, Apartment 45"));
        Add(new Game("Chris", "Ashton",
                "34 West Fifth Street, Apartment 67"));
        Add(new Game("Cassie", "Hicks",
                "56 East Seventh Street, Apartment 89"));
        Add(new Game("Guido", "Pica",
                "78 South Ninth Street, Apartment 10"));
    }

}

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
    }
}
}

I'm most likely doing something stupidly wrong, I haven't coded in quite a while.

I had it worked for one second, then I when I was changing it from Customers to Games, it all stopped working and I couldn't get it working again, even if I changed it back to customers, even if I started the project from scratch again.

Answer 1

I don't see where you are creating the Games object within your code. You will need a Games property with a getter/setter in order to use it in the XAML as you are.

Within MainPage() you need to do something like this:

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
        this.Games = new Games();    // this will execute the Games constructor 
                                     // and add the games to Games
    }

    // allows you to use 'Games' in your xaml
    public ObservableCollection<Game> Games  
    {
        get;
        set;
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
    }
}

As a point of clarity I would use something like 'AllGames', 'CurrentGame', etc. instead of just Games.