public partial class Form1 : Form
    {
Form1数据成员#region Form1数据成员
        private DataTable DT = new DataTable();
        private SqlDataAdapter SDA = new SqlDataAdapter();
#endregion

Form1构造函数#region  Form1构造函数 
        public Form1()
        {
            InitializeComponent();
        }
#endregion

连接数据库显示数据#region  连接数据库显示数据
        private void Form1_Load(object sender, EventArgs e)
        {

            SqlConnection conn = new SqlConnection("server=127.0.0.1;database=pubs;uid=sa");
            SqlCommand SCD = new SqlCommand("select * from tables", conn);
            SDA.SelectCommand = SCD;
            SDA.Fill(DT);
            dataGridView1.DataSource = DT;
        }
#endregion

使用Update更新数据库#region  使用Update更新数据库
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            try
            {
                SqlCommandBuilder SCB = new SqlCommandBuilder(SDA);                
                SDA.Update(DT);
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return;
            }
            MessageBox.Show("更新成功!");
        }
#endregion