R. Ching  MIS Department  California State University, Sacramento Week 12 Object-Oriented Programming Base and Derived Classes Lab Exercise

R. Ching  MIS Department  California State University, Sacramento Steps Create the classCreate the class Define the propertiesDefine the properties Create the accessor methodsCreate the accessor methods Create the constructorsCreate the constructors Create the formCreate the form Create the derived classesCreate the derived classes

R. Ching  MIS Department  California State University, Sacramento  Add the class from the Project menu

R. Ching  MIS Department  California State University, Sacramento Assign a name to the class

R. Ching  MIS Department  California State University, Sacramento  Define the class’ properties

R. Ching  MIS Department  California State University, Sacramento Accessor Methdods  Add the accessor methods Tests the length of the character string

R. Ching  MIS Department  California State University, Sacramento

Constructors  Add the constructors

R. Ching  MIS Department  California State University, Sacramento Create the Form Text boxes Combo box Text box Group box Radio buttons Buttons List box Labels

R. Ching  MIS Department  California State University, Sacramento Add the Subclasses

R. Ching  MIS Department  California State University, Sacramento

Constructor (the same for each class)

R. Ching  MIS Department  California State University, Sacramento Super and Subclasses

R. Ching  MIS Department  California State University, Sacramento Define the Objects Objects to classes Object Class

R. Ching  MIS Department  California State University, Sacramento Button Clicked Find the checked radio button Instantiate the object

R. Ching  MIS Department  California State University, Sacramento

Adding Shared Variables

R. Ching  MIS Department  California State University, Sacramento Read-only property procedures

R. Ching  MIS Department  California State University, Sacramento Temporary Fix

R. Ching  MIS Department  California State University, Sacramento When the user selects an item in the list box, the corresponding counts appear in the labels

R. Ching  MIS Department  California State University, Sacramento Test for the Selected Item

R. Ching  MIS Department  California State University, Sacramento