我在类中所建的函数：
 public DataSet updateset(DataSet changds,string mysqll)////更新数据库(数据集)
        {
            oladp = new OleDbDataAdapter(mysqll, con);
            oldb = new OleDbCommandBuilder(oladp);
            oladp.Fill(changds);
            oladp.Update(changds);
            return changds;
        }
窗体应用：
 private void button1_Click(object sender, EventArgs e)
        {
            databaseManager dm = new databaseManager();
            string myScr = "select user_psw from usermanagertable where user_psw='" + textBox1.Text.Trim() + "'";
            OleDbDataReader dr = dm.myreader(myScr);
            if (textBox1.Text == "")
            {
                MessageBox.Show("请输入用户密码", "提示");
                textBox1.Focus();
            }
            else if (textBox2.Text == ""&&textBox3.Text=="")
            {
                MessageBox.Show("请输入问题或答案", "提示");
                textBox2.Text = textBox3.Text = "";
                textBox2.Focus();
            }
            else
            {
                if (dr.HasRows)
                {
                    while (dr.Read())
                    {
                        string mysrc = dr[0].ToString();
                        
                        string updatestr ="update usermanagertable set user_question=" + textBox2.Text + ",user_answer=" + textBox3.Text + "";
                        DataSet ds = new DataSet();
                        dm.updateset(ds,updatestr);
                        dm.conclose();
                    }
                }
                else
                {
                    MessageBox.Show("用户密码错误", "提示");
                    textBox1.Text = textBox2.Text = textBox3.Text="";
                    textBox1.Focus();
                }
            }

错误提示：
Update 无法找到 TableMapping['Table'] 或 DataTable“Table”。

请指正！！！
谢谢！

要写注释啊，

刚想学这门语言，不大懂，有什么书可以介绍下入门不？

写了注释就能对？搞错没啊？这有关系吗？我上面不是说明了吗？

呵呵，麻烦再看看

oladp.Fill(changds);
            oladp.Update(changds);
是这里出错的吗