private void AddCategory()
 {
     try
     {
         FrmInforTabCategory.isAdd = true;
         FrmInforTabCategory frm = new FrmInforTabCategory();
         frm.StartPosition = FormStartPosition.CenterScreen;
         frm.ShowDialog();
         LoadTabCategory();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }
 private void EditCategory()
 {
     try
     {
         if (row < 0)
         {
             throw new Exception("Chọn loại bánh cần sửa");
         }
         FrmInforTabCategory.id    = Int32.Parse(dgvCategory.Rows[row].Cells[0].Value.ToString());
         FrmInforTabCategory.isAdd = false;
         FrmInforTabCategory frm = new FrmInforTabCategory();
         frm.StartPosition = FormStartPosition.CenterScreen;
         frm.ShowDialog();
         LoadTabCategory();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }