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2011-11-06T19:37:14.557
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2011-11-06T19:37:14.557
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A couple of points: 1) Don't get your UI mixed in with your business logic. 2) You can build a better solution with a collection and a DataTemplate, something like this: C# <pre><code>public class ThingType : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged = delegate { }; public string ThingName { get; set; } private bool thingAvailable; public bool ThingAvailable { get { return thingAvailable; } set { thingAvailable = value; PropertyChanged(this, new PropertyChangedEventArgs("ThingAvailable")); } } } public class MainVM { public ObservableCollection<ThingType> MyThings { get; set; } public MainVM() { MyThings = new ObservableCollection<ThingType>(); MyThings.Add(new ThingType() { ThingName = "thing 1" }); MyThings.Add(new ThingType() { ThingName = "thing 2" }); } public ThingType GetRandomThing() { var availableThings = MyThings.Where(x => x.ThingAvailable == true).ToArray(); int randomThingIndex = new Random().Next(availableThings.Length - 1); availableThings[randomThingIndex].ThingAvailable = false; return availableThings[randomThingIndex]; } } </code></pre> XAML <pre><code><Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Window.Resources> <DataTemplate x:Key="thingTemplate"> <CheckBox Content="{Binding ThingName}" IsChecked="{Binding ThingAvailable, Mode=TwoWay}"/> </DataTemplate> </Window.Resources> <Grid> <ListBox Height="100" HorizontalAlignment="Left" Margin="135,56,0,0" Name="listBox1" VerticalAlignment="Top" ItemsSource="{Binding MyThings}" ItemTemplate="{StaticResource thingTemplate}" Width="120" /> <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="88,195,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> </Grid> </Window> </code></pre>
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1. USYaur
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