winform中textbox提示框

private void Form1_Load(object sender, EventArgs e) { AutoCompleteStringCollection strings = new AutoCompleteStringCollection(); strings.Add("A1");//不区分大小写 strings.Add("A2"); strings.Add("Aas"); strings.Add("B1"); strings.Add("Beijing"); strings.Add("bb-cims"); textBox1.AutoCompleteCustomSource = strings; textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource; textBox1.AutoCompleteMode = AutoCompleteMode.Suggest; }