Method for TextBox to implement input prompt function in C#

This article describes the method of TextBox implementing the input prompt function in C#. Share it for your reference. The details are as follows:

Set the AutoCompleteSource property of TextBox to CustomSource, and set the AutoCompleteMode property of TextBox to SuggestAppend.

using System;
using ;
using ;
using ;
using ;
using ;
using ;
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 )
   {
    (dr["CompanyName"].ToString());
   }
    = filterVals;
  }
  private void Form1_Load(object sender, EventArgs e)
  {
   ();
   BuildAutoCompleteList();
   }
 }
}

I hope this article will be helpful to everyone's C# programming.