Silverlight CheckBoxList, silverlight

Silverlight CheckBoxList, silverlight

Check boxes are used for the project, but there is no CheckBoxList in Silverlight. A simple example is provided based on your understanding and materials:

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>

Here we will reference the WrapPanel panel in the Silverlight 3 Toolkit.

xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"

2. CS

Namespace SilverlightApplication1 {public partial class CheckboxList: UserControl {# region property registration public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty. register ("ItemsSource", typeof (IEnumerable), typeof (CheckboxList), new PropertyMetadata (null, ItemsSourceChanged); public static readonly DependencyProperty SelectedItemsProperty = DependencyProperty. register ("SelectedI Tems ", 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> // data source // </summary> public IEnumerable ItemsSource {get {return GetValue (ItemsSourceProperty) as ObservableCollection <object >;} set {SetValue (ItemsSourceProperty, value );}} /// <summary> /// select items /// </summary> public ObservableCollection <object> SelectedItems {get {return GetValue (SelectedItemsProperty) as ObservableCollection <object> ;} set {SetValue (SelectedItemsProperty, value) ;}/// <summary> // display field /// </summary> pu Blic 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 ). build InternalCollection (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. it EmsSource = _ 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 (); Selected Items = new ObservableCollection <object> () ;}} public class InternalModel: INotifyPropertyChanged {public object Value {get; set;} private bool _ selected; public bool Selected {get {return _ selected;} set {_ selected = value; yypropertychanged ("Selected") ;}} public event PropertyChangedEventHandler PropertyChanged; public void policypropertychanged (string propertyName) {if (Property Changed! = Null) {PropertyChanged (this, new PropertyChangedEventArgs (propertyName ));}}}}

Homepage call Method

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 = "show selected items" 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; }    }     }

Source code: Silverlight CheckBoxList