private void LoadProductTypeCB()
{
Product product = new Product();
string display = "ProductName";
string value = "ProductID";
productCB1.DataSource = product.GetAllProductQuery();
productCB1.DisplayMember = display;
productCB1.ValueMember = value;
productCB2.DataSource = product.GetAllProductQuery();
productCB2.DisplayMember = display;
productCB2.ValueMember = value;
productCB3.DataSource = product.GetAllProductQuery();
productCB3.DisplayMember = display;
productCB3.ValueMember = value;
productCB4.DataSource = product.GetAllProductQuery();
productCB4.DisplayMember = display;
productCB4.ValueMember = value;
}
