自定义控件下拉复选框：CheckBoxComboBox

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
using System.Collections.objectModel;
using System.Collections.Specialized;

namespace PresentationControls
{
    /// 

    /// Martin Lottering : 2007-10-27
    /// --------------------------------
    /// This is a usefull control in Filters. Allows you to save space and can replace a Grouped Box of CheckBoxes.
    /// Currently used on the TasksFilter for TaskStatusses which means the user can select which Statusses to include
    /// in the “Search“.
    /// This control does not implement a CheckBoxListBox instead it adds a wrapper for the normal ComboBox and Items. 
 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件        1423  2007-10-28 01:28  CheckBoxComboBox.sln
     目录           0  2008-04-30 02:47  CheckBoxComboBox\bin\
     目录           0  2008-04-30 02:47  CheckBoxComboBox\bin\Debug\
     文件       35840  2008-04-29 07:09  CheckBoxComboBox\bin\Debug\CheckBoxComboBox.dll
     文件       95744  2008-04-29 07:09  CheckBoxComboBox\bin\Debug\CheckBoxComboBox.pdb
     文件       35961  2008-04-29 07:07  CheckBoxComboBox\CheckBoxComboBox.cs
     文件        3445  2007-11-08 23:16  CheckBoxComboBox\CheckBoxComboBox.csproj
     文件         168  2007-10-28 01:28  CheckBoxComboBox\CheckBoxComboBox.csproj.user
     文件        1080  2007-10-28 02:41  CheckBoxComboBox\CheckBoxComboBox.Designer.cs
     文件        3072  2007-10-28 02:41  CheckBoxComboBox\GripBounds.cs
     文件        1877  2007-10-28 02:41  CheckBoxComboBox\NativeMethods.cs
     文件       20546  2007-11-07 07:00  CheckBoxComboBox\Popup.cs
     文件        1349  2007-10-28 02:35  CheckBoxComboBox\Popup.Designer.cs
     文件        5957  2007-11-07 06:59  CheckBoxComboBox\PopupComboBox.cs
     文件        1326  2007-10-28 02:35  CheckBoxComboBox\PopupComboBox.Designer.cs
     文件        5995  2007-06-22 01:07  CheckBoxComboBox\PopupComboBox.resx
     目录           0  2008-04-30 02:47  CheckBoxComboBox\Properties\
     文件        1448  2007-10-28 01:25  CheckBoxComboBox\Properties\AssemblyInfo.cs
     目录           0  2008-04-30 02:47  CheckBoxComboBox\Selection Wrappers\
     文件        9593  2007-11-08 23:58  CheckBoxComboBox\Selection Wrappers\ListSelectionWrapper.cs
     文件        4924  2008-04-23 09:49  CheckBoxComboBox\Selection Wrappers\objectSelectionWrapper.cs
     目录           0  2008-04-30 02:47  CheckBoxComboBox\
     目录           0  2008-04-30 02:47  DemoApp\bin\
     目录           0  2008-04-30 02:47  DemoApp\bin\Debug\
     文件       35840  2008-04-29 07:09  DemoApp\bin\Debug\CheckBoxComboBox.dll
     文件       95744  2008-04-29 07:09  DemoApp\bin\Debug\CheckBoxComboBox.pdb
     文件       14848  2008-04-29 07:09  DemoApp\bin\Debug\DemoApp.exe
     文件       28160  2008-04-29 07:09  DemoApp\bin\Debug\DemoApp.pdb
     文件       14328  2008-04-29 07:10  DemoApp\bin\Debug\DemoApp.vshost.exe
     文件         490  2007-07-21 13:33  DemoApp\bin\Debug\DemoApp.vshost.exe.manifest
     文件         454  2007-11-08 23:12  DemoApp\DataTableWrappers.cs
............此处省略14个文件信息