C# 自定义ComboBox实现下拉任意组件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Test
{
    public partial class Form1 : Form
    {
        

        public Form1（）
        {
            InitializeComponent（）;
        }

        private void button1_Click（object sender EventArgs e）
        {
            ToolStripControlHost treeViewHost;
            ToolStripDropDown dropDown = new ToolStripDropDown（）;
            CheckedListBox checkList = new CheckedListBox（）;
            checkList.Borderstyle = Borderstyle.None;
            treeViewHost = new ToolStripControlHost（checkList）;
            treeViewHost.Size = new System.Drawing.Size（1000 1000）;
   

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

     文件      25088  2016-10-24 17:36  Test\Test\bin\Debug\Test.exe

     文件      48640  2016-10-24 17:36  Test\Test\bin\Debug\Test.pdb

     文件      11600  2016-10-24 17:42  Test\Test\bin\Debug\Test.vshost.exe

     文件        490  2010-03-17 22:39  Test\Test\bin\Debug\Test.vshost.exe.manifest

     文件       7776  2016-10-24 17:42  Test\Test\Form1.cs

     文件      22762  2016-10-24 17:36  Test\Test\Form1.Designer.cs

     文件       6024  2016-10-24 17:36  Test\Test\Form1.resx

     文件      11322  2016-10-24 17:36  Test\Test\HsComboBox.cs

     文件       1036  2016-10-17 15:51  Test\Test\HsComboBox.Designer.cs

     文件      10521  2016-10-24 17:36  Test\Test\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       6392  2016-10-24 17:36  Test\Test\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        531  2016-10-24 17:42  Test\Test\obj\x86\Debug\Test.csproj.FileListAbsolute.txt

     文件        975  2016-10-24 17:36  Test\Test\obj\x86\Debug\Test.csproj.GenerateResource.Cache

     文件      10009  2016-10-24 17:29  Test\Test\obj\x86\Debug\Test.csprojResolveAssemblyReference.cache

     文件      25088  2016-10-24 17:36  Test\Test\obj\x86\Debug\Test.exe

     文件        429  2016-10-24 17:36  Test\Test\obj\x86\Debug\test.exe.licenses

     文件        180  2016-10-24 17:36  Test\Test\obj\x86\Debug\Test.Form1.resources

     文件      48640  2016-10-24 17:36  Test\Test\obj\x86\Debug\Test.pdb

     文件        180  2016-10-24 17:12  Test\Test\obj\x86\Debug\Test.Properties.Resources.resources

     文件        485  2016-10-17 09:55  Test\Test\Program.cs

     文件       1340  2016-10-17 09:55  Test\Test\Properties\AssemblyInfo.cs

     文件        273  2016-10-24 17:36  Test\Test\Properties\licenses.licx

     文件       2860  2016-10-17 09:55  Test\Test\Properties\Resources.Designer.cs

     文件       5612  2016-10-17 09:55  Test\Test\Properties\Resources.resx

     文件       1091  2016-10-17 09:55  Test\Test\Properties\Settings.Designer.cs

     文件        249  2016-10-17 09:55  Test\Test\Properties\Settings.settings

     文件       3989  2016-10-24 16:45  Test\Test\Test.csproj

     文件        854  2016-10-17 09:55  Test\Test.sln

    ..A..H.     65024  2016-10-24 17:42  Test\Test.suo

     目录          0  2016-10-17 09:55  Test\Test\obj\x86\Debug\TempPE

............此处省略12个文件信息