ต้องการ Source code Update datebase มีรูปให้ดูครับ

StringBuilder sb = new StringBuilder();
string strSql = "";
//ติดต่อฐานข้อมูลเหมือนกันกับ การเพิ่มหรือลบ
...
...
sb.remove(0,sb.lenght);
sb.append("update Member set ");
sb.append("id = '"+ txtID.text +"',");
sb.append("firstname = '"+txtFirstname.text +"',");
sb.append("Lastname ='"+ txtLastname.text +"',");
sb.append("Username ='"+ txtUsername.text +"',");
sb.append("Password ='"+ txtPassword.text +"',");
sb.append("Answer ='"+ txtAsnwer.text +"',");
sb.append("Address ='"+ txtAddress.text +"'");

strSql = sb.tostring();

//คำสั่ง commandtext เหมือนกับการ เพิ่มและลบ

private OleDbConnection database;
StringBuilder sb = new StringBuilder();
            string strSql = "";

            string Connect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application.StartupPath + "\\db1.mdb";

                database = new OleDbConnection(Connect);
                database.Open();

            sb.Remove(0, sb.Length);
            sb.Append("Update Member Set ");
            sb.Append("Firstname = '" + txtfirst.Text + "',");
            sb.Append("Lastname ='" + txtlast.Text + "',");
            sb.Append("Password ='" + txtpassword.Text + "',");
            sb.Append("Answer ='" + txtanswer.Text + "',");
            sb.Append("Address ='" + txtaddress.Text + "'");

                strSql = sb.ToString();
               OleDbCommand SQLCommand = new OleDbCommand();
               SQLCommand.CommandText = strSql;
               SQLCommand.Connection = database;
               SQLCommand.ExecuteNonQuery();
               MessageBox.Show("Update successful!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);