trying to pass information from datagrid into sql table

private void storeDataBTN_Click(object sender, EventArgs e)
{
    //DataTable BookDetails = new DataTable("BookDetails");
    using (conn)
    {
        SqlCommand command = new SqlCommand("INSERT INTO BookDetails VALUES(@Title, @AuthorFirstName, @AuthorSurname, @AquisitionDate, @PublisherName ,@PublisherCity, @PublishingDate, @ISBN, @DDClassification)", conn);
        foreach (DataGridViewRow dr in DGTables.Rows)
        {
            
                command.Parameters.AddWithValue("@Title", titleDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@AuthorFirstName", authorFirstNameDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@AuthorSurname", authorSurnameDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@AquisitionDate", aquisitionDateDataGridViewTextBoxColumn.ToString());
                command.Parameters.AddWithValue("@PublisherName", publisherNameDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@PublisherCity", publisherCityDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@PublishingDate", publishingDateDataGridViewTextBoxColumn.ToString());
                command.Parameters.AddWithValue("@ISBN", iSBNDataGridViewTextBoxColumn);
                command.Parameters.AddWithValue("@DDClassification", dDClassificationDataGridViewTextBoxColumn);

                try
                {
                    conn.Open();
                    int rows = command.ExecuteNonQuery();


                    if (rows > 0)
                    {
                        MessageBox.Show("Insert succesful");
                    }

                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }            
        }
    }