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C# Workshop - Week 1 (Ch. 1 - 4) - Beginners

Jeromy Walsh · 2011-09-04T04:02:44

Welcome to the GDNet C# Workshop – .NET Book Zero Ch. 1 - 4For a complete introduction to this workshop, please look here. Workshop Overview This workshop is designed to aid people in their journey to learn beginning C# (C-Sharp). This workshop is targeted at highly motivated individuals who are interested in learning C# or who have attempted to learn C# in the past, but found that without sufficient support and mentoring they were unable to connect all the pieces of this highly complex but powerful programming language. This is a 'guided' self-teaching C# workshop. Each student is responsible for taking the time to read the material and learn the information. Additionally, this workshop does not attempt to defend C# as a language, nor does it attempt to demonstrate that C# is either more or less useful then other programming languages for any particular purpose. People who intend to start a discussion about the differences between C# and ANY other languages (except as are relevant to a particular discussion), are encouraged to do so elsewhere. This workshop is for educational, not philosophical discussions. Finally, the community and tutors that arise out of this workshop are here for making the learning process run more smoothly, but are not obligated to baby-sit a person's progress. Because everyone will be working from the same references (.NET Book Zero and optionally the C# Language Specification 1.2 & 2.0), students may find it easier to get answers to the specific questions they might have. There is no minimum age requirement, and there is no previous programming experience required. However, we will be moving quickly so it's essential that students stay on task and dont fall behind. Experienced C# Programmers Feel free to post your own additional knowledge about the topics, however please try and keep the information you provide objective. If you MUST provide subjective/opinion-based information, please do so by marking the paragraph with [opinion] tags. This will make it clear to the readers what is fact, and what is opinion. Also, it may be relevant to mark some information with [observation] tags for information which you’ve “observed” but may not be fact. Finally, if you’re providing information which is related to common programming errors, you might tag it with a [warning] tag. Also, feel free to post links to additional resources about the topics for this week. I will do my best to add those to the “Additional Resources” section at the bottom of this post. Quizzes & Exercises Each week I will post review questions and exercises in the weekly thread. Please try and answer them by yourself. Once you've done so, feel free to look over the answers provided by others and submit your own answers if you've not yet seen them posted yet. Discussion about the quiz questions and answers is encouraged for clarification. Finally, experienced C# programmers may feel free to post quiz-like questions and exercises of their own. Additional Resources A good general overview of C# is located at the following URL, with decent descriptions and plenty of code samples. I highly encourage all complete programming beginners to check it out. http://www.publicjoe.f9.co.uk/csharp1/csharp03.html Good Luck! [Edited by - JWalsh on July 23, 2007 9:42:27 PM]

Old Archive Archive

Started by JWalsh July 05, 2007 05:56 PM

91 comments, last by CalebGorde 12 years, 10 months ago

Encio

122

July 09, 2007 10:49 AM

Thanks,

this post added great value for me :)

I hope you'll keep up with next chapters !!

great job

glassflakes

253

July 09, 2007 12:34 PM

nice explanation Dinner, Thank you :D

Haydena

122

July 09, 2007 03:17 PM

Wow! Thanks for this, I was stumped when I had a look at the specification, as I've never programmed before :).

I haven't had a chance to think of any questions yet because I've just got home from work, but I'll read through it tomorrow and think of somethings to ask that I don't understand still.

Again, thanks for simplifying things, I didn't know where to start with the specification and all that complicated talk!

paulecoyote

1,065

July 10, 2007 04:30 AM

Quote: Original post by Washu
Quote: Original post by SamLowry
Quote: Original post by zKarp
Ok I experimented with the code, because that's how I learn.

I tried intergrading this into a GUI interface.

I keep the same code but change the output.

Instead of writeline I have it Textbox1.text.

My question is, how do I convert an int to a string?

because in order to have z.HP be in that textbox, it has to be a string not int.

I tried

z.HP1 = cstr(z.HP)

but than i get errors

Thanks for the help.

-Zac Karpinski

*Sorry if this isn't suppose to be in here but it's related.
int x = 1;string xs = x.ToString();
Or xs = "" + x;

Or xs = string.Empty + x; [wink]

If you want to be really fancy, see Formatting Numeric Results Table (C# Reference) - although the examples use Console.Write, you could use string.Format.

Anything posted is personal opinion which does not in anyway reflect or represent my employer. Any code and opinion is expressed “as is” and used at your own risk – it does not constitute a legal relationship of any kind.

InfernoZeus

140

July 10, 2007 05:03 AM

Hey

Is JWalsh going to continue that overview of the chapter? I found it very useful, and it cleared up a lot of things for me...

Ben

Mike.Popoloski

3,259

July 10, 2007 05:54 AM

Quote: Original post by paulecoyote
Quote: Original post by Washu
Quote: Original post by SamLowry
Quote: Original post by zKarp
Ok I experimented with the code, because that's how I learn.

I tried intergrading this into a GUI interface.

I keep the same code but change the output.

Instead of writeline I have it Textbox1.text.

My question is, how do I convert an int to a string?

because in order to have z.HP be in that textbox, it has to be a string not int.

I tried

z.HP1 = cstr(z.HP)

but than i get errors

Thanks for the help.

-Zac Karpinski

*Sorry if this isn't suppose to be in here but it's related.
int x = 1;string xs = x.ToString();
Or xs = "" + x;
Or xs = string.Empty + x; [wink]

If you want to be really fancy, see Formatting Numeric Results Table (C# Reference) - although the examples use Console.Write, you could use string.Format.

Or xs = (int)TypeDescriptor.GetConverter(typeof(int)).ConvertToInvariantString(x);

:)

Mike Popoloski | Journal | SlimDX

paulecoyote

1,065

July 10, 2007 10:09 AM

Quote: Original post by Mike.Popoloski
Or xs = (int)TypeDescriptor.GetConverter(typeof(int)).ConvertToInvariantString(x);

:)

You sure about that? xs is a string, and you're casting to an int right before assignment.

The type convertor stuff may be a little too advanced right now - but for anyone daring enough to look it up, it basically is a mechanism to allow you to cast between types when you know the types at runtime rather then compile-time.

JWalsh

498

Author

July 10, 2007 11:52 AM

Quote: Original post by InfernoZeus
Hey

Is JWalsh going to continue that overview of the chapter? I found it very useful, and it cleared up a lot of things for me...

Ben

Yes, I will be continuing it. [smile] I'm working on exercises, etc...for next week currently. The rest of the overview will be going up in pieces.

Cheers!

Jeromy Walsh
Sr. Tools & Engine Programmer | Software Engineer
Microsoft Windows Phone Team
Chronicles of Elyria (An In-development MMORPG)
GameDevelopedia.com - Blog & Tutorials
GDNet Mentoring: XNA Workshop | C# Workshop | C++ Workshop
"The question is not how far, the question is do you possess the constitution, the depth of faith, to go as far as is needed?" - Il Duche, Boondock Saints

Mike.Popoloski

3,259

July 10, 2007 02:36 PM

Quote: Original post by paulecoyote
Quote: Original post by Mike.Popoloski
Or xs = (int)TypeDescriptor.GetConverter(typeof(int)).ConvertToInvariantString(x);

:)

You sure about that? xs is a string, and you're casting to an int right before assignment.

The type convertor stuff may be a little too advanced right now - but for anyone daring enough to look it up, it basically is a mechanism to allow you to cast between types when you know the types at runtime rather then compile-time.

Oops! Somehow I just knew that posting something cheeky like that would come back to bite me in the ass. :) The cast should most certainly be (string). Everything else should still work though.

Yes, type converters are gifts from heaven when trying to parse data from a stream or file. For example, if you have a configuration file that defines several colors and their values, instead of trying to parse that data by hand, just use a string->Color type converter. But your right, it is probably way too complicated right now, especially for the beginner thread.

Mike Popoloski | Journal | SlimDX

nykc1977

122

July 10, 2007 03:22 PM

Quote: Original post by Dinner
Im not a teacher, just learning too, but maybe i can help a lil (or confuse you even more T_T)

I think you mostly have it correct with what your saying

rand.Attack(Semirhage);
is calling rand attack method and naming Semirhage as the target

Semirhage would be a object that is being passed into rand attack method

This line is directly connected to that
public void Attack(Character enemy)
This is defining the method and saying what objects/variable it accepts

So attack takes a object of type Character and calls it enemy for the duration of the method

Your next line confused me, but basically ill use it all in an example

public void Attack(Character enemy) {

int resistance = enemy.Level + enemy.Armor;
int damageBySword = 10;

enemy.takeDamage(damageBySword - resistance);

}

So
rand has a sword that can deal 10 damage
Semirhage level is 3 and he has a armour of 5, so resistance would be 8
if Semirhage has 10 life, then after rand uses

rand.Attack(Semirhage);

Semirhage life would now be 8
10 damage minus the 8 resistance means 2 damage is then taken from Semirhage life

Hope that helps at all