c# - GetDecimal を機能させる

Question

MySqlConnection con = new MySqlConnection("host=*;user=*;password=*;database=*;");
MySqlCommand cmd = new MySqlCommand("SELECT * FROM members WHERE username = '" + textBox2.Text + "' AND password = '" + textBox3.Text + "';");
cmd.Connection = con;
DataTable dt = new DataTable();
con.Open();
MySqlDataReader reader = cmd.ExecuteReader();

if (reader.Read() != false)
{
    if (reader.IsDBNull(0) == true)
    {
        cmd.Connection.Close();
        reader.Dispose();
        cmd.Dispose();
        MessageBox.Show("Oops!There was a problem!");
    }
    else
    {
        cmd.Connection.Close();
        reader.Dispose();
        cmd.Dispose();
        this.Hide();
        Main main = new Main();
        main.Show();
        MySqlCommand cmmd = new MySqlCommand("SELECT Pain FROM members WHERE username='" + textBox2.Text + "';");
        cmmd.Connection = con;
        con.Open();
        MySqlDataReader read = cmmd.ExecuteReader();
        if (read.Read())
        {
            if (read.GetDecimal(0) == 1)
            {
                MessageBox.Show("NO");
                cmmd.Connection.Close();
                read.Dispose();
                cmmd.Dispose();
            }
            else
            {
                MessageBox.Show("YES");
                cmmd.Connection.Close();
                read.Dispose();
                cmmd.Dispose();
            }
    }
}
else
{
    MessageBox.Show("You Login Information is incorrect!");
}

C# で PAIN 列を読み取って、0 に等しい場合はメッセージ NO を表示し、1 に等しい場合はメッセージ YES を表示します。痛みの列は INT 型で、8 番目の列です。