how to save the gridview recordsto database

using(SqlConnection connection = new SqlConnection(@"data source=ABC; persist security info=True;initial catalog=ini"))
{
    using(SqlCommand command = new SqlCommand(sql, connection))
    {
        try
        {
            connection.Open();
            for (int i =0; i< gridView1.RowCount; i++)
            {
                SqlParameter parameter = new SqlParameter();
                                parameter.ParameterName = "@Num";

                parameter.SqlDbType = SqlDbType.NVarChar;
                parameter.Direction = ParameterDirection.Input;
                parameter.Value = Convert.ToString(gridView1.GetRowCellValue(i, "Number"));


                command.Parameters.Add(parameter);
            }
            command.ExecuteNonQuery();
        }
        catch(Exception)
        {

        }

    }


}