c#中TextBox输入提示功能

 设置TextBox的AutoCompleteSource的属性为CustomSource，设置TextBox的AutoCompleteMode属性为SuggestAppend。

 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();
          }

     }
 }