private void SalesModule_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'stockManagementSystemDataSet2.Sales' table. You can move, or remove it, as needed.
// this.salesTableAdapter.Fill(this.stockManagementSystemDataSet2.Sales);
//_sales.Category = comboBoxCategory.Text;
comboBoxCategory.DataSource = _salesManager.ComboBoxCategoryList();
comboBoxProduct.DataSource = _salesManager.ComboBoxProductsList();
dataGridViewSales.DataSource = _salesManager.ShowSaleses(_sales);
}