树形ComBoBox控件源码

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace TreeComboBox
{
	public class TreeComboBox : UserControl
	{
		#region 自定义成员变量

		private TextBox m_TextBox;
		private TreeView m_TreeView;
		private Button m_DropdownButton;
		private int m_MaxDropDownItems = 8;
		//是否正在显示下拉列表
		private bool b_Dropdown = false;
		//使能
		private bool b_Enabled = true;
		//事件
		public event EventHandler DropDown;
		public event EventHandler DropDownClosed;
		public event EventHandler EnableChanged;
		public event TreeViewCancelEventHandler BeforeExpand;
		public event TreeViewCancelEventHandler BeforeCollapse;
		public event TreeViewEventHandler AfterExpand;
		public event TreeViewEventHandler AfterCollapse

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     目录          0  2008-01-29 12:28  TreeComboBox

     目录          0  2008-01-30 01:39  TreeComboBox\TreeComboBox

     目录          0  2008-01-29 02:16  TreeComboBox\TreeComboBox\bin

     目录          0  2008-01-29 02:18  TreeComboBox\TreeComboBox\bin\Debug

     文件      24576  2008-01-30 01:39  TreeComboBox\TreeComboBox\bin\Debug\TreeComboBox.dll

     文件        134  2008-01-29 13:32  TreeComboBox\TreeComboBox\BM_dropdown.bmp

     目录          0  2008-01-29 02:16  TreeComboBox\TreeComboBox\Properties

     文件       1405  2008-01-29 02:16  TreeComboBox\TreeComboBox\Properties\AssemblyInfo.cs

    ..A.SH.      3072  2008-01-29 23:51  TreeComboBox\TreeComboBox\Thumbs.db

     文件      11267  2008-01-30 01:39  TreeComboBox\TreeComboBox\TreeComboBox.cs

     文件       2298  2008-01-29 13:23  TreeComboBox\TreeComboBox\TreeComboBox.csproj

     文件       1427  2008-01-29 12:28  TreeComboBox\TreeComboBox.sln

    ..A..H.     19456  2008-01-30 01:58  TreeComboBox\TreeComboBox.suo

     目录          0  2008-01-30 01:41  TreeComboBox\TreeComboBoxTest

     目录          0  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\bin

     目录          0  2008-01-29 12:30  TreeComboBox\TreeComboBoxTest\bin\Debug

     文件      24576  2008-01-30 01:39  TreeComboBox\TreeComboBoxTest\bin\Debug\TreeComboBox.dll

     文件      24576  2008-01-30 01:41  TreeComboBox\TreeComboBoxTest\bin\Debug\TreeComboBoxTest.exe

     文件       1106  2008-01-30 01:41  TreeComboBox\TreeComboBoxTest\Form1.cs

     文件       3723  2008-01-30 01:41  TreeComboBox\TreeComboBoxTest\Form1.Designer.cs

     文件       9996  2008-01-30 01:41  TreeComboBox\TreeComboBoxTest\Form1.resx

     文件        405  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Program.cs

     目录          0  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties

     文件       1290  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties\AssemblyInfo.cs

     文件       2511  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties\Resources.Designer.cs

     文件       5612  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties\Resources.resx

     文件       1021  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties\Settings.Designer.cs

     文件        249  2008-01-29 12:28  TreeComboBox\TreeComboBoxTest\Properties\Settings.settings

     文件       3463  2008-01-29 12:30  TreeComboBox\TreeComboBoxTest\TreeComboBoxTest.csproj

     文件        822  2008-01-30 00:21  TreeComboBox\TreeComboBoxTest\user.bmp

............此处省略4个文件信息