private void cboCategories_SelectedIndexChanged(object sender, EventArgs e)
{
BLLProduct productBLL = new BLLProduct();
gvProducts.DataSource = productBLL.GetProductByCategoryId(int.Parse(cboCategories.SelectedValue.ToString()));
}
private void cboCategories_SelectedIndexChanged(object sender, EventArgs e)
{
BLLProduct productBLL = new BLLProduct();
gvProducts.DataSource = productBLL.GetProductByCategoryId(int.Parse(cboCategories.SelectedValue.ToString()));
}