Solution - Hero Monster Classes Part 1

Tutorial Series: Free C# Fundamentals via ASP.NET Web Apps

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Introduction

This is the solution document for the challenge called ChallengeHeroMonsterClasses Part 1. The purpose of this challenge is to test your knowledge on creating classes and creating properties and methods for those classes. As always, look through only as much of this solution as you need in order to solve the issue you're having.

Step 1: Creating the Character Class and Properties

To begin, create a new ASP.NET Web Application called 'ChallengeHeroMonsterClassesPart1' and add a Default.aspx page as we've done many times in this series. Once added, navigate to Default.aspx.cs and add a new Character class underneath the Default class' definition:


cs-asp-036-challengeheromonsterclassespart1-001


The challenge specifies that this class should have a series of properties within its definition: Name, Health, DamageMaximum and AttackBonus. While no data types were specifically given, we'll initialize these properties with the following:

  1. String Name
  2. Int Health
  3. Int DamageMaximum
  4. Bool AttackBonus

In order to add these properties to the class, we can make use of IntelliSense to generate property stubs. Inside the opening and closing brackets for the Character class, type the word 'prop' and press the Tab key twice to have the following stub generated for you:


cs-asp-036-challengeheromonsterclassespart1-002


This sets up the format correctly for initializing a class property. Repeat this process three times to have four total stubs generated for you:


cs-asp-036-challengeheromonsterclassespart1-003


Next, replace the data types and names with those previously specified to add the properties to our Character class:


cs-asp-036-challengeheromonsterclassespart1-004


Step 2: Creating the Character's Methods

The next requirement of this challenge is to create two methods: Attack() and Defend(). Attack() will return an integer value representing the damage inflicted. This amount will be randomly determined. This means that we'll be using the Random class to generate a random integer value representing the damage.

Beneath the properties of the Character class, but still within the class definition, create the Attack() method with an integer return value. Inside the code block of that method, create an instance of the Random class:


cs-asp-036-challengeheromonsterclassespart1-005


Next, create an integer called damage, which will represent the amount of damage this attack will deal. Set this damage variable equal to a random value, making use of that random instance. Call the random.Next() method, passing in 0 for the lower bound and DamageMaximum for the upper bound:


cs-asp-036-challengeheromonsterclassespart1-006


Then, simply return that damage value to complete this Attack() method:


cs-asp-036-challengeheromonsterclassespart1-007


Now that the attack has been calculated, we need to create another method for defending. Still within the Character class' code block, create a new Defend() method that takes in an integer damage amount:


cs-asp-036-challengeheromonsterclassespart1-008


This method will simply take the health of the calling Character and subtract the damage dealt from their health. To do this, use the 'this' keyword to access the Health property of the Character (hero or monster) who called the method, and subtract the damage amount from their health:


cs-asp-036-challengeheromonsterclassespart1-009


Step 3: Creating new Characters

According to the requirements of this challenge, we need to create two characters inside the Page_Load: A hero and a monster. We'll begin with the hero:


cs-asp-036-challengeheromonsterclassespart1-010


Next, let's initialize the hero's Name, Health, DamageMaximum and AttackBonus properties to the following values:


cs-asp-036-challengeheromonsterclassespart1-011


In the same format, create a new Character called monster and initialize its properties to the following values:


cs-asp-036-challengeheromonsterclassespart1-012


Step 4: Performing the Battle

The next requirement set out for us is to perform the battle, with both opponents taking turns attacking and defending. The hero will go first. To set this up, create a new integer called damage within the Page_Load. Initialize its value to the hero's Attack() method:


cs-asp-036-challengeheromonsterclassespart1-013


Directly underneath this code, call the monster's Defend() method, passing in that same damage integer:


cs-asp-036-challengeheromonsterclassespart1-014


Follow the same pattern to reassign the damage integer to the returned result of the monster's Attack() method, then call the hero's Defend() beneath it:


cs-asp-036-challengeheromonsterclassespart1-015


Tip:

While this method of reusing the damage variable might not be effective in other cases, such as in the case of multiple rounds of attacking and defending, it works for this example. Ideally, you may want instead to create separate heroDamage and monsterDamage variables, but that is optional in this case.

Step 5: Displaying the Battle's Results

The final requirement of this challenge is to create a Label Server Control on the Default page and display the results of the battle to it using a helper method. Let's begin by adding the Label. Navigate to the Default.aspx page and drag and drop a Label onto the form. Clear out its Text property and name it resultLabel, following the naming convention used in this course:


cs-asp-036-challengeheromonsterclassespart1-016


Return to the Default.aspx.cs page and create a new method within the Default class called printStats() that takes in a Character as an input parameter:


cs-asp-036-challengeheromonsterclassespart1-017


Inside this method, we'll simply add to the resultLabel's text (not replace, because this method will be called twice). Use a formatted string displaying the character's Name, Health, DamageMaximum, and AttackBonus properties:


cs-asp-036-challengeheromonsterclassespart1-018


Next, return to the bottom of the Page_Load event and call printStats() twice; once for the hero and once for the monster:


Finally, save and run your project to see the result:


cs-asp-036-challengeheromonsterclassespart1-019


Conclusion

This concludes the solution to the first part of this Hero/Monster Classes challenge. Most of the details should be familiar; creating methods, calling them, etc. However, the concept of creating classes, giving properties, and class-specific methods can be tricky at first. If you did have trouble with this challenge, try it again later. Change the challenge up to make your own so that you can continue to cement these concepts in your mind. Continue to struggle with it until you can successfully complete it on your own. Struggling forces you to really learn the content, not just emulate it.

Congratulations on completing this challenge. The next part, which builds on this, awaits you. Good luck!


Related Articles in this Tutorial:

Lesson 1 - Series Introduction

Lesson 2 - Installing Visual Studio 2015

Lesson 3 - Building Your First Web App

Lesson 4 - Understanding What You Just Did

Lesson 5 - Working with Projects in Visual Studio

Lesson 6 - Simple Web Page Formatting in Visual Studio

Challenge 1

Solution 1

Lesson 7 - Variables and Data Types

Lesson 8 - Data Type Conversion

Lesson 9 - Arithmetic Operators

Lesson 10 - C# Syntax Basics

Challenge 2 - ChallengeSimpleCalculator

Solution - ChallengeSimpleCalculator

Lesson 11 - Conditional If Statements

Lesson 12 - The Conditional Ternary Operator

Challenge 3 - ChallengeConditionalRadioButton

Solution - Challenge Conditional RadioButton

Lesson 13 - Comparison and Logical Operators

Lesson 13 Challenge - First Papa Bob's Website

Solution - Challenge First Papa Bob's Website

Lesson 14 - Working with Dates and Times

Lesson 15 - Working With Spans of Time

Lesson 16 - Working with the Calendar Server Control

Challenge 4 - Challenge Days Between Dates

Solution - Challenge Days Between Dates

Lesson 17 - Page_Load and Page.IsPostBack

Lesson 18 - Setting a Break Point and Debugging

Lesson 19 - Formatting Strings

Challenge 5 - Challenge Epic Spies Assignment

Solution - Challenge Epic Spies Assignment

Lesson 20 - Maintaining State with ViewState

Lesson 21 - Storing Values in Arrays

Lesson 22 - Understanding Multidimensional Arrays

Lesson 23 - Changing the Length of an Array

Challenge 6 - Challenge Epic Spies Asset Tracker

Solution - Challenge Epic Spies Asset Tracker

Lesson 24 - Understanding Variable Scope

Lesson 25 - Code Blocks and Nested If Statements

Lesson 26 - Looping with the For Iteration Statement

Challenge 7 - Challenge For Xmen Battle Count

Solution - Challenge For Xmen Battle Count

Lesson 27 - Looping with the while() & do...while() Iteration Statements

Lesson 28 - Creating and Calling Simple Helper Methods

Lesson 29 - Creating Methods with Input Parameters

Lesson 30 - Returning Values from Methods

Lesson 31 - Creating Overloaded Methods

Lesson 32 - Creating Optional Parameters

Lesson 33 - Creating Names Parameters

Lesson 34 - Creating Methods with Output Parameters

Challenge 8 - Challenge Postal Calculator Helper Methods

Solution - Challenge Postal Calculator Helper Methods

Mega Challenge Casino

Solution - Mega Challenge Casino

Lesson 35 - Manipulating Strings

Challenge 9 - Phun With Strings

Solution - Challenge Phun With Strings

Lesson 36 - Introduction to Classes and Objects

Challenge - Hero Monster Classes Part 1

Solution - Hero Monster Classes Part 1

Challenge - Hero Monster Classes Part 2

Solution - Challenge Hero Monster Classes Part 2

Lesson 37 - Creating Class Files Creating Cohesive Classes and Code Navigation

Lesson 38 - Understanding Object References and Object Lifetime

Lesson 39 - Understanding the .NET Framework and Compilation

Lesson 40 - Namespaces and Using Directives

Lesson 41 - Creating Class Libraries and Adding References to Assemblies

Lesson 42 - Accessibility Modifiers, Fields and Properties

Lesson 43 - Creating Constructor Methods

Lesson 44 - Naming Conventions for Identifiers

Lesson 45 - Static vs Instance Members

Challenge 10 - Challenge Simple Darts

Solution - Challenge Simple Darts

Lesson 46 - Working with the List Collection

Lesson 47 - Object Initializers

Lesson 48 - Collection Initializers

Lesson 49 - Working with the Dictionary Collection

Lesson 50 - Looping with the foreach Iteration Statement

Lesson 51 - Implicitly-Typed Variables with the var Keyword

Challenge 11 - Challenge Student Courses

Solution - Challenge Student Courses

Mega Challenge War

Solution - Mega Challenge War

Lesson 52 - Creating GUIDs

Lesson 53 - Working with Enumerations

Lesson 54 - Understanding the switch() Statement

Lesson 55 - First Pass at the Separation of Concerns Principle

Lesson 56 - Understanding Exception Handling

Lesson 57 - Understanding Global Exception Handling

Lesson 58 - Understanding Custom Exceptions

Lesson 59 - Creating a Database in Visual Studio

Lesson 60 - Creating an Entity Data Model

Lesson 61 - Displaying the DbSet Result in an ASP.NET GridView

Lesson 62 - Implementing a Button Command in a GridView

Lesson 63 - Using a Tools-Centric Approach to Building a Database Application

Lesson 64 - Using a Maintenance-Driven Approach to Building a Database Application

Lesson 65 - Creating a New Instance of an Entity and Persisting it to the Database

Lesson 66 - Package Management with NuGet

Lesson 67 - NuGet No-Commit Workflow

Lesson 68 - Introduction the Twitter Bootstrap CSS Framework

Lesson 69 - Mapping Enum Types to Entity Properties in the Framework Designer

Lesson 70 - Deploying the App to Microsoft Azure Web Services Web Apps

Papa Bob's Mega Challenge

Papa Bob's Mega Solution Part 1 - Setting up the Solution

Papa Bob's Mega Solution Part 2 - Adding an Order to the Database

Papa Bob's Mega Solution Part 3 - Passing an Order from the Presentation Layer

Papa Bob's Mega Solution Part 4 - Creating the Order Form

Papa Bob's Mega Solution Part 5 - Adding Enums

Papa Bob's Mega Solution Part 6 - Creating an Order with Validation

Papa Bob's Mega Solution Part 7 - Calculating the Order Price

Papa Bob's Mega Solution Part 8 - Displaying the Price to the User

Papa Bob's Mega Solution Part 9 - Creating the Order Management Page


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