C# 树形结构自动搜索填充

【实例截图】

【核心代码】

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;
using System.Collections;

namespace WindowsFormsApplication1
{

    public partial class Form1 : Form
    {
        private ToolStripControlHost dtTScomponent;
        public Form1()
        {
            InitializeComponent();
            DropDownTree MyDropDownTree = new DropDownTree();
            dtTScomponent = new ToolStripControlHost(MyDropDownTree);
            this.toolStrip1.Items.Insert(0, dtTScomponent);
            this.toolStrip1.AutoSize = true;
            //string[] words = { "cherry", "apple", "blueberry" };
            //int shortestWordLength = words.Min(w => w.Length);
            //int shortestWordLength = words.Min(w => w.Length);
            //for (int i = 0; i < (words.Select(item => item.Substring(0, 1)).Count); i  )
            //{
            //    Console.WriteLine(words.Select(item => item.Substring(0, 1))[i]);
            //}


        }

        private void Form1_Load(object sender, EventArgs e)
        {
            cmb.AutoCompleteSource = AutoCompleteSource.ListItems;
            cmb.AutoCompleteMode = AutoCompleteMode.Suggest;
            this.dropDownTree1.TVOriginal = this.treeView1;
            string temp = GetID("1");
            int i = 0;
        }
        private string GetID(string strName)
        {
            string strRet = string.Empty;
            int Start = strName.IndexOf('(');

            int end = strName.IndexOf(')');
            if (Start == -1 || end == -1)
            { return string.Empty; }
            strName.Substring(Start   1, end - Start - 1);
            return strRet;
        }
        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            this.cmb.DroppedDown = true;

            System.Collections.ArrayList myLst = new System.Collections.ArrayList();
            //  myLst = CBaseFunc.GetName(textBox1.Text.Trim());
            foreach (string m in myLst)
            {
                cmb.AutoCompleteCustomSource.Add(m);
            }
            //设置autocopletesource 和 autocompletemode属性即可
        }
    }
    public class CBaseFunc
    {
        public static System.Collections.ArrayList GetName(string strname)
        {
            //树形结构
            ArrayList list = new ArrayList();
            list.Add("1");
            list.Add("2");
            return list;
        }
    }
}