项目要用到复选框，可是在Silverlight中不存在CheckBoxList。通过查阅资料以及依据自己的理解，写了简单演示样例：
1.XAML
<UserControl x:Class="SilverlightApplication1.CheckboxList"
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:SilverlightApplication1"
xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White">
<ListBox x:Name="lst">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel Orientation="Vertical" Height="30" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</Grid>
</UserControl>
当中这里要引用Silverlight 3 Toolkit中的WrapPanel面板
xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"
2.CS
namespace SilverlightApplication1
{
public partial class CheckboxList : UserControl
{
#region 属性注冊
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(IEnumerable), typeof(CheckboxList), new PropertyMetadata(null, ItemsSourceChanged)); public static readonly DependencyProperty SelectedItemsProperty =
DependencyProperty.Register("SelectedItems", typeof(IEnumerable), typeof(CheckboxList), new PropertyMetadata(null)); public static readonly DependencyProperty DisplayMemberPathProperty =
DependencyProperty.Register("DisplayMemberPath", typeof(string), typeof(CheckboxList), new PropertyMetadata(string.Empty)); private static ObservableCollection<InternalModel> _internalCollection; /// <summary>
/// 数据源
/// </summary>
public IEnumerable ItemsSource
{
get { return GetValue(ItemsSourceProperty) as ObservableCollection<object>; }
set { SetValue(ItemsSourceProperty, value); }
} /// <summary>
/// 选择项
/// </summary>
public ObservableCollection<object> SelectedItems
{
get { return GetValue(SelectedItemsProperty) as ObservableCollection<object>; }
set { SetValue(SelectedItemsProperty, value); }
} /// <summary>
/// 显示字段
/// </summary>
public string DisplayMemberPath
{
get { return GetValue(DisplayMemberPathProperty) as string; }
set { SetValue(DisplayMemberPathProperty, value);
if (value != null)
lst.ItemTemplate =
(DataTemplate)XamlReader.Load(
@"<DataTemplate
xmlns=""http://schemas.microsoft.com/client/2007"">
<CheckBox Content=""{Binding Value." +
DisplayMemberPath +
@", Mode=TwoWay}"" IsChecked=""{Binding Selected, Mode=TwoWay}""/>
</DataTemplate>");
}
} private static void ItemsSourceChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
((CheckboxList)obj).BuildInternalCollection(e.NewValue as IEnumerable);
} private void BuildInternalCollection(IEnumerable collection)
{
_internalCollection = new ObservableCollection<InternalModel>();
foreach (var obj in collection)
{
var nContainerItem = new InternalModel { Selected = false, Value = obj };
nContainerItem.PropertyChanged += nContainerItem_PropertyChanged;
_internalCollection.Add(nContainerItem);
}
lst.ItemsSource = _internalCollection;
} void nContainerItem_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (SelectedItems == null)
SelectedItems = new ObservableCollection<object>(); SelectedItems.Clear(); foreach (var o in _internalCollection.Where(internalModel => internalModel.Selected))
SelectedItems.Add(o.Value);
}
#endregion
public CheckboxList()
{
InitializeComponent();
SelectedItems = new ObservableCollection<object>(); }
} public class InternalModel : INotifyPropertyChanged
{
public object Value { get; set; }
private bool _selected;
public bool Selected
{
get { return _selected; }
set
{
_selected = value;
NotifyPropertyChanged("Selected");
}
} public event PropertyChangedEventHandler PropertyChanged; public void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
主页面调用的方法
1.XAML
<UserControl x:Class="SilverlightApplication1.MainPage"
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:SilverlightApplication1"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<UserControl.Resources>
<local:People x:Key="folks"/>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="400"></RowDefinition>
<RowDefinition Height="40"></RowDefinition>
</Grid.RowDefinitions>
<local:CheckboxList x:Name="checkboxlist" ItemsSource="{Binding AllPeople,Source={StaticResource folks},Mode=TwoWay}" DisplayMemberPath="Name"/>
<Button Grid.Row="1" Content="显示选中项" Click="Button_Click" Width="60" HorizontalAlignment="Right" Margin="5"></Button>
</Grid>
</UserControl>
2.CS
namespace SilverlightApplication1
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
} private void Button_Click(object sender, RoutedEventArgs e)
{
string msg = string.Empty;
ObservableCollection<object> list = checkboxlist.SelectedItems;
foreach (var obj in list)
{
Person per = obj as Person; msg += per.Name + "\n";
}
MessageBox.Show(msg);
}
} public class Person
{
public int ID { get; set; }
public string Name { get; set; } } public class People
{
public People()
{
AllPeople = (from a in Enumerable.Range(1, 10)
select
new Person { ID = a, Name = "Name: " + a }
).ToList(); }
public List<Person> AllPeople { get; set; }
} }