Builder - Replacing the Constructors

• Why? : Don't put constructors in your model yo, it makes the code base a little harder to read.

Create the initial "User" model

• Setting up the User Model

  • Create : Models Directory
  • Create : User Model
    • string Name;
    • int Age;

• Create The printer class

  • Create : "Utility" Directory
  • Create : "Printer" class
    • Static void Print( User )
    • Outputs:
      • User : - Age :

• Back in main:

  • Create a user

    • Name : Jake
    • Age : 26

  • Print it

Create the UserBuilder

• User Builder:

  • Create the "Builders" Directory

  • Create the UserBuilder

    • Each builder method "return this;"

      • SetName
      • SetAge

    • Build - Returns a new user

• Test it:

  • In the program.cs
  • Use the builder to create a user
    • Name - Jake
    • Age - 26
  • Build the user
  • Print the output user
    • User - Jake, Age : 26

Create the embedded Address model:

• Setting up the Address model:

  • Create : Address Model
    • string PostCode
    • int HouseNumber

• Embed it into the User class

  • Add to user, the member : Address

• Extend the Printer class:

  • Print(Address)
    • Address : - PostCode :
  • Have it be called, when Print(User) is called

• Use it in main:

  • Update the created user, by setting
  • User.Address = new Address()
  • Set PostCode = "BS23"
  • Set HouseNumber = 1

Embedded AddressBuilder

• Builder Setup:

  • Create the AddressBuilder

    • Each builder method "return this;"

      • SetZipCode
      • SetHouseNumber

    • Build - Returns a new address

  • Embed the address builder in the user builder

    • AddressBuilder.UserBuilder

  • Extend UserBuilder:

    • Give it the "WithAddress" function
    • User.WithAddress(a => a.Set() );

  • Call address.Build() inside of user.Build()

• Back in the main function:

  • Extend the print function to print the address
    • HouseNumber : 1, ZipCode : BS20
  • Use the "HavingAddress" to set :
    • houseNumber to 1
    • ZipCode to BS20

Using a Builder to it's fullest

• Creating a family

  • Create Dad

    • Name : Joseph
    • Age : 50
    • Address:
      • HouseNumber : 45
      • PostCode : LONDON

  • Update the builder - To create the mom

    • Name : Justine
    • Age : 45

  • Update the builder - To create the son

    • Name : John
    • Age : 13

  • Update the builder - To create the daughter

    • Name : Abby
    • Age : 20

• Print them all

  • Check their addresses are all the same