/// <summary>
/// Gets four random product from the product list, with no duplications.
/// </summary>
/// <param name="products">The Products list from the order system.</param>
/// <returns></returns>
public IList<Product> GetRandomProducts()
{
/* To ensure uniqueness, we first create a list of product IDs.
* Then we generate a random number to pull an ID from the list,
* adter which we delete the ID from the list. That way, even if
* the same random number is generated twice, the product ID
* selected will be unique. */
// Initialize
int productID = -1;
IList<Product> results = new List<Product>();
// Create a list of product IDs
List<int> productIdList = new List<int>();
for (int i = 0; i < 10; i++)
{
productIdList.Add(i);
}
// Grab four products at random
for (int i = 0; i < 4; i++)
{
// Get a random number
int n = m_RandomNumberGenerator.Next(productIdList.Count - 1);
// Get a product ID, then delete it
productID = productIdList[n];
productIdList.RemoveAt(n);
// And add the product to the results list
results.Add(p_Catalog[productID]);
}
// Set return value
return results;
}