private void btn_ExportExcel_Click(object sender, EventArgs e)
        {
            string pathsave = "";

            try
            {
                System.Windows.Forms.SaveFileDialog saveFileDialog = new SaveFileDialog();

                saveFileDialog.Title      = "Browse Excel Files";
                saveFileDialog.DefaultExt = "Excel";
                saveFileDialog.Filter     = "Excel files (*.xls)|*.xls";

                saveFileDialog.CheckPathExists = true;


                if (saveFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    pathsave = saveFileDialog.FileName;

                    saveFileDialog.RestoreDirectory = true;
                    Controller.ExportCustomsDeclaration exportCustoms = new Controller.ExportCustomsDeclaration();
                    if (ListhQERPBOMs.Count > 0)
                    {
                        exportCustoms.ExportCompareasionBOM(pathsave, ListhQERPBOMs);
                    }
                }
            }
            catch (Exception ex)
            {
            }
        }