Re: Tao problem - C# Discussion Boards

Simon P Stevens17-Jun-08 1:37

17-Jun-08 1:37

A reference type consists of the actual object stored on the heap, and a pointer to that object. The pointer (also known as a reference) is a value type and is stored on the stack.

Thus, a reference is a value type.

http://cairocafe.blogspot.com/2007/07/net-reference-and-value-types.html[^]

Simon

Re: pass by value

V.17-Jun-08 2:50

17-Jun-08 2:50

DaveyM69 wrote:
I looked at cloning

Most objects that have a "clone" method also have a "copy" method I believe. That might do what you want?

V.

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

Re: pass by value

Simon P Stevens17-Jun-08 3:06

Simon P Stevens

17-Jun-08 3:06

Official advice is that clone should not be used.

From the framework design guidelines:
"Do not implement ICloneable.
Do not use ICloneable in public APIs"

MS are considering obsoleting it:
http://blogs.msdn.com/brada/archive/2004/05/03/125427.aspx[^]

Simon

Re: pass by value

V.17-Jun-08 4:13

17-Jun-08 4:13

Lol, maybe you should reply that to the one who needs it Smile | :)

V.

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

Tao problem

Ranger4916-Jun-08 23:47

Ranger49

16-Jun-08 23:47

static void Main(string[] args)
{
Glut.glutInit();

I get a runtime error here "Cannot find freeglut.dll", while I downloaded this example code from the Code Project website.

I installed SDLdotNet runtime environment, and the Tao.OpenGL and Tao.FreeGlut References are available in the solution.

I haven't got a clue as to what is going wrong here, can someone tell me?

Did I post this message in the right area?

Ranger49

Re: Tao problem

Alan Balkany17-Jun-08 4:12

Alan Balkany

17-Jun-08 4:12

The first thing to try is putting freeglut.dll in the same folder as your .exe.

Re: Tao problem

Ranger4917-Jun-08 5:08

Ranger49

17-Jun-08 5:08

Alan Balkany wrote:
The first thing to try is putting freeglut.dll in the same folder as your .exe.

But 1) freeglut.dll was not in the SDL-sdk-win32-exe that I installed. And 2) I am using VC#2008 which works with .NET and I don't think VC#2008EE generates executables.

Thanks so much for telling me this, but I think I already tried this...

Ranger.

Re: Tao problem

Alan Balkany17-Jun-08 5:11

Alan Balkany

17-Jun-08 5:11

It's possible freeglut.dll was installed at a different location. Try using Windows Explorer to search your hard disk for this file. If you don't have it, your application won't run.

(I have a hard time believing your compiler doesn't generate executables.)

mapped my local folder from remote server

chakran16-Jun-08 23:39

chakran

16-Jun-08 23:39

I mapped my local folder from remote server. now am trying to run applicaiton(EXE FILE) from mapped network drive (which is in remote server) it opens a window with two options run and cancel. when click run the window goes off. it is not displaying any error messages. where am going wrong.

am using framework 2.0 and c# winforms.

Re: mapped my local folder from remote server

buchstaben16-Jun-08 23:41

buchstaben

16-Jun-08 23:41

I guess it's a security issues. you try to start your app over network, which requires extended policies. you'll need to register your assembly in .net policies

Re: mapped my local folder from remote server

chakran17-Jun-08 20:44

chakran

17-Jun-08 20:44

am unable to understand your solution. Can you explain in detail? start appl over network, what this mean?
if I open the application, it is running in local and remote system. after mapping only am getting problem. it is not showing any error message. simply window goes off.

Converting VB-> C#

cst_kvp16-Jun-08 23:23

cst_kvp

16-Jun-08 23:23

How to convert the following code written in VB.Net to C#.Net?

Private P As New Collection

Thanks.

Re: Converting VB-> C#

buchstaben16-Jun-08 23:29

buchstaben

16-Jun-08 23:29

VBA.Collection p = new VBA.Collection()

.. or use a more specified type of collection, like ArrayList

Setup and deployment

ali zaidi16-Jun-08 23:15

ali zaidi

16-Jun-08 23:15

I have created a window project with the name winProject and it's database is in sql server 2005 the name is winDatabase
Now i want to create a setup that installs the project(winProject)
and it's database(winDatabase)
Please reply me

Re: Setup and deployment

Ed.Poore17-Jun-08 6:03

Ed.Poore

17-Jun-08 6:03

Take a look at WiX[^] that has the ability to install SQL databases.

I doubt it. If it isn't intuitive then we need to fix it. - Chris Maunder

Casting from Single to Int32

RugbyLeague16-Jun-08 22:49

RugbyLeague

16-Jun-08 22:49

Is there a way to test if the cast will work before actually doing the cast? My app will spend a lot of time testing for valid casts and many times the cast won't be valid so I want to avoid the overhead of catching the InvalidCastException.

TIA

Re: Casting from Single to Int32

N a v a n e e t h16-Jun-08 23:15

N a v a n e e t h

16-Jun-08 23:15

Use is keyword.

if(yourObject is SomeType)
  // do cast

. Or use as keyword

obj = yourObject as SomeType;
if(obj != null)
  // use obj

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: Casting from Single to Int32

RugbyLeague16-Jun-08 23:19

RugbyLeague

16-Jun-08 23:19

Single and Int32 are non nullable value types so can't be used with 'is' and 'as'

Re: Casting from Single to Int32

N a v a n e e t h16-Jun-08 23:31

N a v a n e e t h

16-Jun-08 23:31

Ohh I haven't noticed the single and int32 in the title. I am sorry.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: Casting from Single to Int32

Anthony Mushrow16-Jun-08 23:46

Anthony Mushrow

16-Jun-08 23:46

Why would casting from a single to an int not be valid, is there something you're not telling us?

My current favourite word is: I'm starting to run out of fav. words!

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Re: Casting from Single to Int32

RugbyLeague16-Jun-08 23:55

RugbyLeague

16-Jun-08 23:55

Errr, yes, I am telling you my example was stupid D'Oh! | :doh:

Basically is there a way when casting between value types to work out if a cast will work without testing it and catching Invalidcast or Overflow?

Re: Casting from Single to Int32

Anthony Mushrow17-Jun-08 0:38

Anthony Mushrow

17-Jun-08 0:38

I don't think there is...

I reckon the best you can do is check the float isn't too big, too small, ot is NaN. You could write up a little method:

public bool ConvertSingleToInt(float Single, out int Integer)
{
  Integer = 0;

  if(Single > int.MaxValue || Single < int.MinValue || float.IsNaN(Single) ) )
    return false;

  Integer = (int)Single;
  return true;
}

My current favourite word is: I'm starting to run out of fav. words!

-SK Genius

Game Programming articles start -here[^]-

Re: Casting from Single to Int32

RugbyLeague17-Jun-08 0:45

RugbyLeague

17-Jun-08 0:45

I am coming to the same conclusion, thanks for your help. I am actually considering just going down the exception catching route - if its slow when a cast is invalid or overflows then it's a great indicator that those casts shouldn't be attempted in the first place.

Re: Casting from Single to Int32

DaveyM6917-Jun-08 0:25

DaveyM69

17-Jun-08 0:25

Have you looked at the Int32Converter class and its CanConvertFrom method? There are xxxConverter classes for all the integral data types I believe.

Dave

Re: Casting from Single to Int32

RugbyLeague17-Jun-08 0:42

RugbyLeague

17-Jun-08 0:42

I have looked at those but they don't seem to take into account the data in the variable being cast, just if a converter exists or not.

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