Data from SQL Server databse not showing in a DataGridView

For the populateDataGridView()-method below I have an instance of DataGridView called dtGridView and an instance of a BindingSource called bndSource.
 
I can see that the data is written to bndSource, but the data does not get from the bndSource to the dtGridView.
 
My question is:
 
Why do the data from bndSource not display in dtGridView ?
 
Best regards,
 
KL

private void populateDataGridView()
        {
            string connectionString = "Data Source=MY-PC;Initial Catalog=TestDataBase;Integrated Security=SSPI";
            string sqlQuery = "SELECT * From dataTable";
            SqlConnection connection = new SqlConnection(connectionString);
            SqlDataAdapter dataAdapter = new SqlDataAdapter(sqlQuery, connection);
            
            DataTable dataTable = new DataTable();
            
            connection.Open();
            dataAdapter.Fill(dataTable);
            connection.Close();
            bndSource.DataSource = dataTable;
              
            dtGridView.DataSource = bndSource;
        }