C# 下拉框实现多选功能自定义控件源码

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      35961  2008-04-28 19:07  CheckBoxComboBox\Backup\CheckBoxComboBox\CheckBoxComboBox.cs

     文件       3445  2007-11-08 11:16  CheckBoxComboBox\Backup\CheckBoxComboBox\CheckBoxComboBox.csproj

     文件        168  2007-10-27 13:28  CheckBoxComboBox\Backup\CheckBoxComboBox\CheckBoxComboBox.csproj.user

     文件       1080  2007-10-27 14:41  CheckBoxComboBox\Backup\CheckBoxComboBox\CheckBoxComboBox.Designer.cs

     文件       3072  2007-10-27 14:41  CheckBoxComboBox\Backup\CheckBoxComboBox\GripBounds.cs

     文件       1877  2007-10-27 14:41  CheckBoxComboBox\Backup\CheckBoxComboBox\NativeMethods.cs

     文件      20546  2007-11-06 19:00  CheckBoxComboBox\Backup\CheckBoxComboBox\Popup.cs

     文件       1349  2007-10-27 14:35  CheckBoxComboBox\Backup\CheckBoxComboBox\Popup.Designer.cs

     文件       5957  2007-11-06 18:59  CheckBoxComboBox\Backup\CheckBoxComboBox\PopupComboBox.cs

     文件       1326  2007-10-27 14:35  CheckBoxComboBox\Backup\CheckBoxComboBox\PopupComboBox.Designer.cs

     文件       5995  2007-06-21 13:07  CheckBoxComboBox\Backup\CheckBoxComboBox\PopupComboBox.resx

     文件       1448  2007-10-27 13:25  CheckBoxComboBox\Backup\CheckBoxComboBox\Properties\AssemblyInfo.cs

     文件       9593  2007-11-08 11:58  CheckBoxComboBox\Backup\CheckBoxComboBox\Selection Wrappers\ListSelectionWrapper.cs

     文件       4924  2008-04-22 21:49  CheckBoxComboBox\Backup\CheckBoxComboBox\Selection Wrappers\objectSelectionWrapper.cs

     文件       1423  2007-10-27 13:28  CheckBoxComboBox\Backup\CheckBoxComboBox.sln

    ..A..H.     20480  2013-04-12 16:36  CheckBoxComboBox\Backup\CheckBoxComboBox.suo

     文件        454  2007-11-08 11:12  CheckBoxComboBox\Backup\DemoApp\DataTableWrappers.cs

     文件       3905  2007-11-07 22:13  CheckBoxComboBox\Backup\DemoApp\DemoApp.csproj

     文件        328  2008-04-22 20:27  CheckBoxComboBox\Backup\DemoApp\DemoApp.csproj.user

     文件       4481  2008-04-28 19:09  CheckBoxComboBox\Backup\DemoApp\Form1.cs

     文件      11730  2008-04-28 19:09  CheckBoxComboBox\Backup\DemoApp\Form1.Designer.cs

     文件       5814  2008-04-28 19:09  CheckBoxComboBox\Backup\DemoApp\Form1.resx

     文件        499  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Program.cs

     文件       1430  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Properties\AssemblyInfo.cs

     文件       2843  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Properties\Resources.Designer.cs

     文件       5612  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Properties\Resources.resx

     文件       1092  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Properties\Settings.Designer.cs

     文件        249  2007-10-27 13:27  CheckBoxComboBox\Backup\DemoApp\Properties\Settings.settings

     文件       1064  2007-11-08 11:56  CheckBoxComboBox\Backup\DemoApp\Statusses.cs

     文件      36352  2017-09-12 21:47  CheckBoxComboBox\CheckBoxComboBox\bin\Debug\CheckBoxComboBox.dll

............此处省略87个文件信息