C# 仿百度自动匹配

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


namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void comboBox1_TextChanged(object sender, EventArgs e)
        {
           
        }


        private void Form1_Load(object sender, EventArgs e)
        {
            // Create the list to use as the custom source. 
            AutoCompleteStringCollection source = new AutoCompleteStringCollection();
            source.AddRange(new string[]
                    {
                        "January",
                        "February",
                        "March",
                        "April",
                        "May",
                        "June",
                        "July",
                        "August",
                        "September",
                        "October",
                        "November",
                        "December"
                    });


            // Create and initialize the text box.
            TextBox textBox = new TextBox();




            textBox.AutoCompleteCustomSource = source;
            textBox.AutoCompleteMode =
                AutoCompleteMode.SuggestAppend;
            textBox.AutoCompleteSource =
                AutoCompleteSource.CustomSource;
            textBox.Location = new Point(20, 20);
            textBox.Width = ClientRectangle.Width - 40;
            textBox.Visible = true;




            // Add the text box to the form.
            Controls.Add(textBox);
            //comboBox1.DropDownHeight = 300;
        }
    }