C# Discussion Boards - CodeProject

10-Nov-06 0:33

I am trying to get the the btnEat button to be able to access the methods for the dog object I have created but it does not exist outside of the btnCreate event. Please advise, I think its something fundamental but I can not find anywhere which answers my question, or I do not know the correct terminology for it, thanks. Wink | ;)

************************ EVENTS on button ************************

private void btnCreate_Click(object sender, EventArgs e)

{
Animal dog = new Animal();
dog.Name = txtName.Text;
lstAnimals.Items.Add(dog.Name);
lblAnimalCount.Text = "Animal Count " + Animal.Animals.ToString();
MessageBox.Show("There is currently " + Animal.foodstock.ToString() + " units of food left");
dog.eat(); //Dog Can eat here
MessageBox.Show(dog.Name + " has eaten 1 unit of food, there are now " + Animal.foodstock.ToString() + " units left");
}

private void btnEat_Click(object sender, EventArgs e)
{
// I want to make dog eat here but not sure how.
}

************************ ANIMAL CLASS ************************

class Animal

{
public Animal()
{
Animals += 1;
}

public static int foodstock = 15;
public static int Animals;

string AnimalsName;

public string Name
{
set
{
AnimalsName = value;
}

get
{
return AnimalsName;
}
}

public void eat()
{
foodstock -= 1;
}

}

******************************************************************

Thanks a million, this is a real stumbling block for me at the moment in learning Big Grin | :-D

rah_sin10-Nov-06 0:43

rah_sin

10-Nov-06 0:43

i think u should define Animal dog; otside the event and in event section

private void btnCreate_Click(object sender, EventArgs e)

{
dog = new Animal();
dog.Name = txtName.Text;
lstAnimals.Items.Add(dog.Name);
lblAnimalCount.Text = "Animal Count " + Animal.Animals.ToString();
MessageBox.Show("There is currently " + Animal.foodstock.ToString() + " units of food left");

MessageBox.Show(dog.Name + " has eaten 1 unit of food, there are now " + Animal.foodstock.ToString() + " units left");
}

private void btnEat_Click(object sender, EventArgs e)
{
if(dog!=null)
{
dog.eat();
}
}

rahul

Whatevernameyouwant10-Nov-06 0:57

10-Nov-06 0:57

I have declared the object here and it works as I hoped:

namespace WindowsApplication1
{
public partial class frmAnimal : Form
{
public frmAnimal()
{
InitializeComponent();
}

Animal dog = new Animal();
....
}

Is this an acceptable place to put it or is there a standard? Do you have any advice on where I can learn about this syntax? Thanks

*-Edit-*
I also would like to add another animal, i.e a cat would I need to declare where I have put "Animal dog = new Animal();" another one for cat or could I use a variable instead of 'dog' and dynamically name the object (I really hope this makes sense!!)

Phill

rah_sin10-Nov-06 1:08

rah_sin

10-Nov-06 1:08

that all depends upon ur need that what scope of accessibilty u want to provide to particular object or member,u can find it in any basic book on c#.

rahul

ed^nrgc10-Nov-06 3:25

10-Nov-06 3:25

Your problem is scope. You created the object in create_click, thus it goes out of scope when the method terminates. You can create a member of the application of type Animal. Then instantiate the object in the create click. The object will have a global scope within the current form.

Whatevernameyouwant10-Nov-06 4:59

10-Nov-06 4:59

Thank you for this, I will give it a go tonight

All the best

Phill

Whatevernameyouwant11-Nov-06 0:26

11-Nov-06 0:26

Hi, I have tried to understand by what you meant by "You can create a member of the application of type Animal", please excuse me if it is a really simple thing you have suggested.

Is it possible to explain in a little more detail?

Very Much Appreciated

Phill

ed^nrgc13-Nov-06 2:59

13-Nov-06 2:59

namespace WindowsApplication1
{
  public partial class frmAnimal : Form
  {
    public frmAnimal()
    {
    InitializeComponent();
    }
    ...
    //private members here
    private Animal myAnimal;

    public Animal MyAnimal
    {
      get{ return myAnimal; }
      set{ myAnimal = value }
    }
  }
}

Then in your form's create method, just create the instance.

MyAnimal = new Animal;

Then it will be accessible to the entire form.

Whatevernameyouwant14-Nov-06 0:27

Custom control border problem - WS_EX_CLIENTEDGE behavies differently depending on the WindowClass

14-Nov-06 0:27

Thankyou for your example it has helped me a lot,

I have been practicing different examples of how to create the methods just using the console instead of jumping straight into forms and I am finding it easier to grasp the concepts

Thanks

Phill Smile | :)

Simon P Stevens9-Nov-06 23:51

Simon P Stevens

9-Nov-06 23:51

Hi,

I've created a custom text control, and when i set the BorderStyle to Fixed3d, as you'd expect I get a 3d border. Trouble is, with the XP theme on, other text boxes have a flat blue border when set to fixed3d, which is what I want mine to mimic.

I've looked at the extended styles on a normal text box, and it's got WS_EX_CLIENTEDGE set, which is the same as my custom text box.

does anyone know how to get this border behaviour.

Cheers

Simon

Which C# book to use

azure0529-Nov-06 23:00

azure052

9-Nov-06 23:00

Hi,

I just picked up a special interest in C# and the .NET, but having problems selecting a text for study. Can anyone with much experience advise as to the best and most comprehensive book to use for C# and the .NET for individuals with little or no programming experience?

I'm also into PHP and MySQL. I heard that the Visual Studio.Net/Visual Studio support the development of PHP codes. Is this true?

V.9-Nov-06 23:07

9-Nov-06 23:07

Wrox is very good and complete, but very boring as well...
The microsoft books weren't bad for beginners and are less boring, but they don't go in dept at all...

hope this helps...

V.

Stop smoking so you can: Enjoy longer the money you save.
Moviereview Archive

Pete O'Hanlon9-Nov-06 23:28

Pete O'Hanlon

9-Nov-06 23:28

The APress books are pretty good as well.

Arthur Dent - "That would explain it. All my life I've had this strange feeling that there's something big and sinister going on in the world."
Slartibartfast - "No. That's perfectly normal paranoia. Everybody in the universe gets that."

Deja View - the feeling that you've seen this post before.

Kevin McFarlane10-Nov-06 0:48

Kevin McFarlane

10-Nov-06 0:48

You won't find a book that's both good for programmers with little or no programming experience and comprehensive.

However, the Micrsoft Press books for the Visual Studio Express editions might be worth a look.

Kevin

Ashish Derhgawen10-Nov-06 2:12

Ashish Derhgawen

10-Nov-06 2:12

Check out this MSDN thread: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=849534&SiteID=1[^]

- Ashish

Time flies like an arrow;
Fruit flies like a banana.

Ashish Derhgawen - http://ashishrd.blogspot.com[^]

ed^nrgc10-Nov-06 3:33

Detect Sound Device in C#

10-Nov-06 3:33

Wrox has a series of books that start at the beginner level, and show a "road map" of books to help you progress in your task.

bahman2000b9-Nov-06 22:34

bahman2000b

9-Nov-06 22:34

How can I detect the sound device?
Which namespace is required?
and what type is its input and output? is it binary?
Thanks for answer.

Bahman

Log4Net

Vinoth4CS9-Nov-06 22:20

Vinoth4CS

9-Nov-06 22:20

Hi dudes,
could you Please help me with a code, to log errors into a text file using log4net in c#.. would appreciate your help if u help me asap.
many thanks
Smile | :)

Thanks & Regards,
Vinothkumar V

Re: Log4Net

Kevin McFarlane10-Nov-06 0:57

Kevin McFarlane

10-Nov-06 0:57

Nothing in the documentation?

Kevin

Re: Log4Net

ed^nrgc10-Nov-06 3:35