public void menu()
{
int choice;
bool b;
do
{
System.Console.WriteLine("1. Add Product");
System.Console.WriteLine("2. Show product");
System.Console.WriteLine("3. Show Product By ID");
System.Console.WriteLine("4. Delete Product");
System.Console.WriteLine("5. Update Prroduct");
System.Console.WriteLine("6. Exit");
b = int.TryParse(System.Console.ReadLine(), out choice);
if (b == true)
{
switch (choice)
{
case 1:
AddProduct(); // calling AddProduct Method declared Locally
break;
case 2:
DisplayProducts(); // calling DisplayProducts Method declared Locally
break;
case 3: GetProductByID(); break; // calling GetProductByID Method declared Locally
case 4: RemoveProduct(); break; // calling RemoveProduct Method declared Locally
case 5:
UpdateProduct(); // calling update Method declared Locally
break;
default:
System.Console.WriteLine("Please Enter the Correct Option");
break;
}
}
else
{
System.Console.WriteLine("Please Enter the only digits");
}
} while (choice != 6);
//local function to add products into List
void AddProduct()
{
Product product = new Product(); // creating the object for Product class
ProductBusiness pb = new ProductBusiness(); // Creating thhe object for ProductBusiness class
bool check1 = false;
do
{
try
{
System.Console.WriteLine("enter the ProductId");
System.Console.WriteLine("Product ID must start with PID and should be less than 6");
product.ProductID = System.Console.ReadLine();
if (pb.CheckProductID(product.ProductID) == false) //checking whether the productId avaliable in the list or not to enter unique productId into list
{
check1 = true;
System.Console.WriteLine("enter the ProductName:");
System.Console.WriteLine("ProductName must Contain only alphabets");
product.ProductName = System.Console.ReadLine();
System.Console.WriteLine("enter the Productprice:");
product.Price = System.Convert.ToDouble(System.Console.ReadLine());
pb.AddProducts(product); //adding the products into the List
System.Console.WriteLine("Product Added Sucessfully!!!");
}
}
catch (ProductException e)
{
System.Console.WriteLine(e.Message);
}
} while (check1 == false);
}
// Local Function to Dispaly Product Details
void DisplayProducts()
{
ProductBusiness pb = new ProductBusiness();// Creating object for ProductBusiness class
List <Product> prodts = pb.DispalyProducts();
System.Console.WriteLine("===============Product Details=============");
System.Console.WriteLine("ProductName" + " " + "ProductID" + " " + "ProductPrice");
System.Console.WriteLine("-----------------------------------------------------------------------");
foreach (Product item in prodts)
{
System.Console.WriteLine(item.ProductName + " " + item.ProductID + " " + item.Price);// Displaying the products
}
}
// Local function to remove a Product form List
void RemoveProduct()
{
Product Product = new Product(); // creating the object fro Product class
ProductBusiness pb = new ProductBusiness(); // Creating object for ProductBusiness class
bool check1 = false;
do
{
try
{
System.Console.Write("Enter the ProductID to be Deleted:");
System.Console.WriteLine("Product ID must start with PID and should be less than 6");
string id = System.Console.ReadLine();
if (pb.CheckProductID(id) == true)//checking whether the productId avaliable in the list or not
{
check1 = true;
pb.RemoveProduct(id);
System.Console.WriteLine("Product Removed");
}
else
{
System.Console.WriteLine("ProductID does not Exixts");
}
}
catch (Exception e)
{
System.Console.WriteLine(e.Message);
}
} while (check1 == false);
}
// local Function to get details of Product by Id
void GetProductByID()
{
ProductBusiness pb = new ProductBusiness(); // Creating object for ProductBusiness class
bool check1 = false;
do
{
try
{
System.Console.Write("Enter the ProductID: ");
System.Console.WriteLine("Product ID must start with PID and should be less than 6");
string productID = System.Console.ReadLine();
if (pb.CheckProductID(productID))
{
check1 = true;
Product pe = pb.GetProductByProductID(productID);
System.Console.WriteLine(pe.ProductID + " " + pe.ProductName + " " + pe.Price);
}
else
{
throw new ProductException("ProductID Does not Exsits");
}
}
catch (Exception e)
{
System.Console.WriteLine(e.Message);
}
} while (check1 == false);
}
// local function to update product details
void UpdateProduct()
{
Product product = new Product(); // creating the object for Product class
ProductBusiness pb = new ProductBusiness(); // Creating object for ProductBusiness class
System.Console.WriteLine("1. Update Product Name");
System.Console.WriteLine("2. Update Product Price");
int option;
System.Console.Write("enter your Choice: ");
option = int.Parse(System.Console.ReadLine());
switch (option)
{
case 1:
UpdateProductName(); break;
case 2:
UpdateProductPrice(); break;
}
// inner function to update a product name by using productID
void UpdateProductName()
{
bool check1 = false;
do
{
try
{
System.Console.WriteLine("Enter Existing Product ID");
System.Console.WriteLine("Product ID must start with PID and should be less than 6");
product.ProductID = System.Console.ReadLine();
if (pb.CheckProductID(product.ProductID))//checking whether the productId avaliable in the list or not
{
check1 = true;
System.Console.WriteLine("Enter new name for Product");
System.Console.WriteLine("ProductName must Contain only alphabets");
product.ProductName = System.Console.ReadLine();
pb.UpdateProductName(product);
System.Console.WriteLine("ProductName updated!!");
}
else
{
throw new ProductException("ProductID does not Exixts");
}
}
catch (Exception e)
{
System.Console.WriteLine(e.Message);
}
} while (check1 == false);
}
// inner function to update a product price by using ProductID
void UpdateProductPrice()
{
bool check1 = false;
do
{
try
{
System.Console.WriteLine("Enter Existing Product ID");
System.Console.WriteLine("Product ID must start with PID and should be less than 6");
product.ProductID = System.Console.ReadLine();
if (pb.CheckProductID(product.ProductID))//checking whether the productId avaliable in the list or not
{
check1 = true;
System.Console.WriteLine("Enter new Price for Product");
product.Price = System.Convert.ToDouble(System.Console.ReadLine());
pb.UpdateProductPrice(product);
System.Console.WriteLine("Product Price Updated Sucessfully!!!");
}
else
{
throw new ProductException("ProductID does not Exixts");
}
}
catch (Exception e)
{
System.Console.WriteLine(e.Message);
}
} while (check1 == false);
}
}
}
