csharp C＃数据库更新

Posted 2021-05-12

MySqlConnection con = new MySqlConnection("server=localhost;userid=root;password=kodasdell;database=dev_db");

private void button3_Click(object sender, EventArgs e)
        {

            if (textBox4.Text != "" && textBox5.Text != "" && comboBox1.Text != "")
            {
                MySqlCommand cmd = new MySqlCommand("UPDATE dev_table SET "
                    + comboBox1.Text
                    +"= '"
                    + textBox5.Text
                    + "' where id= "
                    + textBox4.Text, con);

                con.Open();
                cmd.ExecuteNonQuery();
                MessageBox.Show("Success!");
                con.Close();
            }
            else { MessageBox.Show("There is empty field(s)!"); }
        }