项目要用到复选框，但是在Silverlight中不存在CheckBoxList，通过查阅资料以及根据自己的理解，写了简单示例：
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>
其中这里要引用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 属性注册
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource",typeof(IEnumerable),typeof(CheckBoxList),new PropertyMetadata(null,ItemsSourceChanged));
public static readonly DependencyProperty SelectedItemsProperty =
DependencyProperty.Register("SelectedItems",new PropertyMetadata(null));
public static readonly DependencyProperty displayMemberPathProperty =
DependencyProperty.Register("displayMemberPath",typeof(string),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; }
}
}
源码： Silverlight CheckBoxList
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