带CheckBox功能的ComboBox

带CheckBox功能的ComboBox,可以在下拉框中选择多个CheckBox选项。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections.objectModel;
using System.ComponentModel;

namespace MultiSelectComboBox
{
    /// 

    /// Interaction logic for MultiSelectComboBox.xaml
    /// 

    public partial class MultiSelectComboBox : UserControl
    {
        private ObservableCollection _nodeList;
        public MultiSelectComboBox（）
        {
            InitializeComponent（）;
            _nodeList = new ObservableCollection（）;
        }

        #region Dependency Properties

        public static readonly DependencyProperty ItemsSourceProperty =
             DependencyProperty.Register（“ItemsSource“ typeof（Dictionaryject>） typeof（MultiSelectComboBox） new frameworkPropertymetadata（null
        new PropertyChangedCallback（MultiSelectComboBox.OnItemsSourceChanged）））;

        public static readonly DependencyProperty SelectedItemsProperty =
         DependencyProperty.Register（“SelectedItems“ typeof（Dictionaryject>） typeof（MultiSelectComboBox） new frameworkPropertymetadata（null
     new PropertyChangedCallback（MultiSelectComboBox.onselectedItemsChanged）））;

        public static readonly DependencyProperty TextProperty =
           DependencyProperty.Register（“Text“ typeof（string） typeof（MultiSelectComboBox） new UIPropertymetadata（string.Empty））;

        public static readonly DependencyProperty DefaultTextProperty =
            DependencyProperty.Register（“DefaultText“ typeof（string） typeof（MultiSelectComboBox） new UIPropertymetadata（string.Empty））;



        public Dictionaryject> ItemsSource
        {
            get { return （Dictionaryject>）GetValue（ItemsSourceProperty）; }
            set
            {
                SetValue（ItemsSourceProperty value）;
            }
        }

        public Dictionaryject> SelectedItems
        {
            get { return （Dictionaryject>）GetValue（SelectedItemsProperty）; }
            set
            {
                SetValue（SelectedItemsProperty value）;
            }
        }

        public string Text
        {
            get { return （string）GetValue（TextProperty）; }
            set { SetValue（TextProperty value）; }
        }

        public string DefaultText
        {
            get { return （string）GetValue（DefaultTextProperty）; }
            set { SetValue（DefaultTextProperty value）; }
        }
        #endregion

        #region Events
        private static void OnItemsSourceChanged（Dependencyobject d DependencyPropertyChangedEventArgs e）
        {
            M

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件        2602  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox.sln
     文件       40960  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox.v11.suo
     目录           0  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\
     目录           0  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\bin\
     目录           0  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\bin\Debug\
     文件       16896  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\bin\Debug\MultiSelectComboBox.dll
     文件       34304  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\bin\Debug\MultiSelectComboBox.pdb
     文件        3978  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\MultiSelectComboBox.csproj
     文件        5168  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\MultiSelectComboBox.xaml
     文件        8239  2013-07-23 17:32  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\MultiSelectComboBox.xaml.cs
     目录           0  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\
     目录           0  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\
     文件        7406  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件        3317  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.baml
     文件        1709  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.csproj.FileListAbsolute.txt
     文件         917  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.csproj.GenerateResource.Cache
     文件       16896  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.dll
     文件        4775  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.g.cs
     文件        4775  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.g.i.cs
     文件        3563  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.g.resources
     文件       34304  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.pdb
     文件         180  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox.Properties.Resources.resources
     文件         317  2013-07-23 17:33  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox_MarkupCompile.cache
     文件         317  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\MultiSelectComboBox_MarkupCompile.i.cache
     目录           0  2013-03-17 18:19  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\obj\Debug\TempPE\
     目录           0  2013-07-23 17:31  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\
     文件        2320  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\AssemblyInfo.cs
     文件        2864  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\Resources.Designer.cs
     文件        5612  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\Resources.resx
     文件        1102  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\Settings.Designer.cs
     文件         201  2013-03-19 09:47  MultiSelectComboBox Demo（Codebehind）\MultiSelectComboBox\Properties\Settings.settings
............此处省略39个文件信息