vc.net数据绑定后，新增，删除，跟新

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
            SqlConnection sqlconstr = new SqlConnection(oa.sqlstrcon);           
            string sqlstr;
            DataSet data1 = new DataSet(); SqlDataAdapter datasql;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.BindingContext[data1.Tables[0]].RemoveAt(0);
            //this.BindingContext[data1.Tables[0]].EndCurrentEdit();
            //this.BindingContext[data1.Tables[0]].AddNew();
           datasql.Update(data1.Tables[0]);
           // data1.AcceptChanges();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
             sqlstr = "select * from sysuser";
             sqlconstr.Open();
             SqlCommand cmdsql = new SqlCommand(sqlstr, sqlconstr);
            datasql = new SqlDataAdapter(cmdsql);
            SqlCommandBuilder datasql1 = new SqlCommandBuilder(datasql);
            datasql.SelectCommand = cmdsql;
            datasql.Fill(data1);
            user_no.DataBindings.Add("Text", data1.Tables[0], "user_no");
            name.DataBindings.Add("text", data1.Tables[0], "name");
            sysuser.DataBindings.Add("text", data1.Tables[0], "sysuser");
            dept.DataBindings.Add("text", data1.Tables[0], "dept");
        }
    }
}