TextBox 智能感应

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // Create the list to use as the custom source. 
            var source = new AutoCompleteStringCollection();
            source.AddRange(new string[]
                    {
                        "January",
                        "February",
                        "March",
                        "April",
                        "May",
                        "June",
                    });
            textBox1.AutoCompleteCustomSource = source;
            textBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
            textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
        }
    }
}

　　TextBox.AutoCompleteMode 属性

　　　　　　属性成员：None, Suggest， Append, SuggesetAppend

　　TextBox.AutoCompleteSource 属性

　　　　　　属性成员：None, FileSystem, CustomSource, HistoryList, RecentlyUsedList, AllUrl, AllSystemSources, FileSystemDirectories

AutoCompleteMode 和 AutoCompleteSource 属性必须一起使用。

TextBox.AutoCompleteCustomSource 属性

这个用于TextBox.AutoCompleteSource 属性选择CustomSource时的数据源

AutoCompleteStringCollection 类

看看上面那个AutoCompleteCustomSource的类型就知道了，把数据源写在这里面