C＃形式的Oracle插入語句將無法正常工作？

Question

我已經做了這個小方法，可以將C＃表單中的數據插入到Oracle數據庫中。 代碼處理得很好，但是當我去SQL Developer檢查記錄是否已插入時，我什么也沒發現...

        public void conn2db()
        {
            try
            {
                string connstring = "data source=test_db;user id=system;password=password;";
                string statmentcmd = "insert into register_user (userid,username,pass,fullname,phonenum,gender,country) values (" + 1 + "," + textBox1.Text + "," + textBox2.Text + "," + textBox4.Text + "," + textBox5.Text + "," + radioButtonValue+ ","+comboBox1.Text+");";

                OracleConnection conn = new OracleConnection(connstring);
                conn.Open();
                MessageBox.Show("connected to database");

                OracleCommand cmd = new OracleCommand();

                cmd.CommandText=statmentcmd;
                cmd.Connection=conn;
                OracleDataAdapter oda = new OracleDataAdapter(cmd);

                MessageBox.Show(statmentcmd);

                conn.Close();
                MessageBox.Show("Connection closed");

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString()); 
            }
        }

Answer 1

嘗試執行以下命令：

OracleCommand cmd = new OracleCommand();

cmd.CommandText = statmentcmd;
cmd.Connection = conn;
cmd.ExecuteNonQuery();

或更簡單地說：

OracleCommand cmd = new OracleCommand(statmentcmd, conn);
cmd.ExecuteNonQuery();

Answer 2

嘗試更改復制到輸出目錄：請勿復制