C＃ - DataGridView未显示完整查询结果

Question

我正在研究一个项目，我在navicat上添加了一个查询，显示了我想要的结果，但是当我在项目中使用相同的查询时，它只显示了5行结果。

用于填充datagridview并获取数据的代码如下。

    string cs = "*info*";
    MySqlConnection liga = new MySqlConnection(cs);
    string query = "*I have the full query futher down, its big and it looks stange in here*";
    MySqlCommand comando = new MySqlCommand(query, liga);
    int nInt = Convert.ToInt32(textBox1.Text);

    comando.Parameters.AddWithValue("@ni", nInt);
    try
    {
        liga.Open();
        MySqlDataReader leitor = comando.ExecuteReader();

        DataTable tabela = new DataTable();
        tabela.Load(leitor);
        dataGridView1.DataSource = tabela;
        leitor.Close();
    }
    catch (MySqlException ex)
    {
        MessageBox.Show(ex.Message);
    }
    finally
    {
        liga.Close();
    }

QUERY

SELECT
disciplinas.nome AS Disciplina,
mods_alunos.numero,
mods_alunos.nota

FROM
mods_alunos

INNER JOIN disciplinas ON mods_alunos.codDisc = disciplinas.codDisc

WHERE
nInterno = @ni

我得出的结论是它与INNER JOIN有关，因为我只是做SELECT * FROM mods_alunos它显示超过5个结果

编辑1：