C#中TextBox实现输入提示功能的方法

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using WindowsApplication7.DataSet1TableAdapters;namespace WindowsApplication7{ public partial class Form1 : Form {  DataSet1 ds = new DataSet1();  CustomersTableAdapter adpter = new CustomersTableAdapter();  public Form1()  {   InitializeComponent();  }  private void BuildAutoCompleteList()  {   AutoCompleteStringCollection filterVals = new AutoCompleteStringCollection();   foreach (DataRow dr in ds.Customers)   {    filterVals.Add(dr["CompanyName"].ToString());   }   txtCompanyName.AutoCompleteCustomSource = filterVals;  }  private void Form1_Load(object sender, EventArgs e)  {   adpter.Fill(ds.Customers);   BuildAutoCompleteList();   } }}