Printing only columns in rows that have values from a datagridview

After filling a DataTable with the data, go through the columns and delete the empty.

DbAdapter.Fill(dt);

for (int i = dt.Columns.Count - 1; i >= 0; i--)
{
    if (dt.AsEnumerable().All(row => row[i].ToString() == ""))
    {
        dt.Columns.RemoveAt(i);
    }
}

qbcDataGridView.DataSource = dt;