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Hasenj

Using Keyboard in C#

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Hi,
 
I'm new on this forum and after reading a while I decided to start. I choose as environment Visual Studio Express 2010 with C# and XNA 4.0, because I thought it's well documented to get better tutorials and so on.
 
I have no programming skills. I have some ressources like microsoft forum and some ebooks like O'Reillys "Learning XNA 4.0".
 
my question is.. to learn the first steps I would try to work with 2d sprites.
 
I have a KeyboardState and my sprite is showing and it works but if I want to use my keyboards, nothing happens.
 
I write this code in the Update method:
 

// this 2 lines are in my class game
Vector2 ringsPosition = Vector2.Zero;
const float ringsSpeed = 6;

// this move threerings based on keyboard input are in my update method 
KeyboardState keyboardState = Keyboard.GetState(); 
if (keyboardState.IsKeyDown(Keys.Left)) 
    ringsPosition.X -= ringsSpeed; 
if (keyboardState.IsKeyDown(Keys.Right)) 
    ringsPosition.X += ringsSpeed; 
if (keyboardState.IsKeyDown(Keys.Up)) 
    ringsPosition.Y -= ringsSpeed; 
if (keyboardState.IsKeyDown(Keys.Down)) 
    ringsPosition.Y += ringsSpeed;

 
The Microsoft.XNA.Framework.Input is in using and works. If I start to debug and test, my sprites are animated but nothing happend if I use my keyboard.
 
any ideas? Or did you need the complete code to check what I'm doing wrong?
thanks.

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That code should work. Show the whole Game1 class, please.

 

PS: Are you familiar with breakpoints and inspecting variables (i.e. the interactive debugger of Visual Studio)?

Edited by unbird

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KeyboardState usage looks fine, but i am not sure if you can increment only X component of a vector. maybe you should try:

 

ringsPosition += new Vector(0,6); 

 

of course this is of top of my head, if you upload your code online, I will be able to determine for sure the problem. 

 

have a nice day!

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...but i am not sure if you can increment only X component of a vector...


That's fine if it is an accessible field (or even as an array element). Won't work for properties, though, since then you work on a copy (but the compiler will complain then)

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Hi,

 

I tried and now it works.. but I didn't know why is now working.. I can't reproduce it :-( 

I need definitly work with different versions if something is not working..

 

 

PS: Are you familiar with breakpoints and inspecting variables (i.e. the interactive debugger of Visual Studio)?

 

No I didn't know.. as I said.. I'm absolute novice.. I don't have any programming skills.. It's my first try.. (in my past I did work with HTML & CSS, but this is anything else but not a programming language..)

 

Thank you very much for all the responses.. 

best-

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Well, glad it's working.biggrin.png

 

For starting out so-called version control is probably overkill, but having a manual history of your progress helps.

 

Search for (video) tutorials about debugging C#. This is something you wanna learn right now.

Edited by unbird

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