C# Discussion Boards - CodeProject

Saridakis Manolis13-Oct-12 22:56

13-Oct-12 22:56

Hello,

The problem is, when I run a method from other form (example: From form1 I call form2.mymethod) , it show me error in MessageBoxManager.cs
in:
hHook = SetWindowsHookEx(WH_CALLWNDPROCRET, hookProc, IntPtr.Zero, AppDomain.GetCurrentThreadId());

How can I solve this ?

Best regards
Manolis Saridakis

Re: Error in Messagebox solution

Eddy Vluggen14-Oct-12 0:40

Eddy Vluggen

14-Oct-12 0:40

Saridakis Manolis wrote:
How can I solve this ?

Disable the hook when debugging. It's not even related to the error you are reporting.

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Re: Error in Messagebox solution

Dave Kreskowiak14-Oct-12 3:58

Dave Kreskowiak

14-Oct-12 3:58

Why are you using AppDomain.GetCurrentThreadId()?? That's been obsolate since .NET 2.0 because it doesn't return the correct ID in all cases.

Any why are you setting this hook at all??

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Problem with OpenCvSharp

Daniel Heinsohn13-Oct-12 11:54

Daniel Heinsohn

13-Oct-12 11:54

Hi, i'm trying to get OpenCvSharp runing and i couldn't manage to make it work. Google tutorials haven't help, or i just can't get it right. Anyone that can help me installing and a basic tutorial?

I'm trying to make my program recognize a PS3 Eye (hopefull could choose in the differents resolutions settings), and show live video.

Re: Problem with OpenCvSharp

Eddy Vluggen14-Oct-12 0:40

Eddy Vluggen

14-Oct-12 0:40

Daniel Heinsohn wrote:
Google tutorials haven't help, or i just can't get it right. Anyone that can help me installing and a basic tutorial?

What makes you think my tutorials are better than those of Google? What does "couldn't manage to make it work" mean? Did you get an exception, some kind of error? Did the library not compile?

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Re: Problem with OpenCvSharp

Daniel Heinsohn14-Oct-12 14:01

Daniel Heinsohn

14-Oct-12 14:01

Those from google are probably the same ones you or anyone here post, i just can make them work i think. Whenever i want to run a code for recognizing camera, an error pops about the P/invoke. Give me 3 possible solutions, but non of them of my understanding.

OpenCV's DLL files exist in the same directory as the executable file....
Visual C++ Redistributable Package has been installed....
The target platform(x86/x64) of OpenCV's DLL files and OpenCvSharp is the same as your project's....

Maybe i got a wrong OpenCvSharp.dll

Re: Problem with OpenCvSharp

Eddy Vluggen15-Oct-12 0:08

Eddy Vluggen

15-Oct-12 0:08

Daniel Heinsohn wrote:
Whenever i want to run a code for recognizing camera, an error pops about the P/invoke. Give me 3 possible solutions, but non of them of my understanding.

The problem with other tutorials is that they'll use a comparable technique, and you'd be running into the same wall.

If the PC is 64 bits, might be a conflict with incompatible versions. What did the P/Invoke exception say?

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

want to see 1page when MDI use.

Subhajit00113-Oct-12 6:15

Subhajit001

13-Oct-12 6:15

i want to use 1 page in C#.. when we use MDI. like as web page... can it possible....?

Re: want to see 1page when MDI use.

Dave Kreskowiak13-Oct-12 7:02

Dave Kreskowiak

13-Oct-12 7:02

Tehn you don't need MDI as it stands for MULTIPLE Document Interface. A single editor that let's you edit mulitple documents of the same type. That was it's intended design and you would be trying to make it do something it's NOT designed to do.

You don't need MDI for this and from the sounds of it, you don't even need a Windows Forms app.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Drawing a 3D polygon from coordinates (KML)

tokano13-Oct-12 5:20

tokano

13-Oct-12 5:20

Hello all!

I have to draw a 3D terain (polygon) using openGL and Tao Framework in C#. The problem is, i have never done such things before and i dont know how to start. I have my KML file and i wonder, how to read data or use coordinates, to draw a 3D terain of the path i've walked (or drove with a car).

Can anyoone give me any advice or help how to start making the 3D object of it?

Thnx.

The point of the program is, to create a 3D polygon which can rotate around, so i could see in 3D where i walked, if u can understand what i mean with that.

modified 13-Oct-12 11:39am.

Re: Drawing a 3D polygon from coordinates (KML)

Dave Kreskowiak13-Oct-12 7:07

Dave Kreskowiak

13-Oct-12 7:07

I highly suggest picking up a book on 3D graphics. You're not going to get all the information you need from a couple of forum posts.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Drawing a 3D polygon from coordinates (KML)

tokano13-Oct-12 12:10

tokano

13-Oct-12 12:10

Yes, i can imagine that. I thought some directons would help me from people who are already familiar with such things.

The thing was told to be 'easy' to make.

Any help given, will be apreciated, like your reply. Thnx.

Greets, Tom

Re: Drawing a 3D polygon from coordinates (KML)

Dave Kreskowiak13-Oct-12 12:39

Dave Kreskowiak

13-Oct-12 12:39

tokano wrote:
The thing was told to be 'easy' to make.

"Easy" is a term relative to the skill level of the person doing it, not the task itself.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

How to Display fingerprint images from fingerprint Device ?

osama_hagrass13-Oct-12 5:18

osama_hagrass

13-Oct-12 5:18

How to Display fingerprint images from fingerprint Device?

Re: How to Display fingerprint images from fingerprint Device ?

Dave Kreskowiak13-Oct-12 6:59

Dave Kreskowiak

13-Oct-12 6:59

By consulting the SDK documentation for the device.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

calling a non static method from a static method in a dll class

Fred 3413-Oct-12 0:35

Fred 34

13-Oct-12 0:35

namespace NecRoutines
{
  public class Invoke
  {
    private System.Windows.Forms.Timer TrzTimer = new System.Windows.Forms.Timer();
    private void TrzInitialize()
    {
      this.TrzTimer.Tick += new System.EventHandler(this.TrzTimer_Tick);
      TrzTimer.Interval = 1000;
      TrzTimer.Enabled = true;
      TrzTimer.Start();
    }
    private void TrzTimer_Tick(object sender, EventArgs e)
    {
      // do something when time elapses
    }

    public static void TrzStart()
    {
       TrzInitialize();
    }
  }
}

//An object reference is required for the non-static field, method, or property

this is the error message that i get for calling TrzInitialize() during building this
DLL program. Consider that TrzInitialize() must be non static because of timer routine definition and TrzStart() must be static to be known for main program. thanks

Re: calling a non static method from a static method in a dll class

n.podbielski13-Oct-12 1:49

n.podbielski

13-Oct-12 1:49

You cannot call TrzInitialize from static method.
Its common sense. Since Invoke.TrzStart is static and you have 10 instances if Invoke class which of them you want to use to call TrzInitialize?
You have to explicilty set that instance like

public static void TrzStart(Invoke instance)
    {
       instace.TrzInitialize();
    }

No more Mister Nice Guy... >: |

Re: calling a non static method from a static method in a dll class

Fred 3413-Oct-12 2:39

Fred 34

13-Oct-12 2:39

thanks, it works properly I appreciate your knowledge. So I am still a novice.

Re: calling a non static method from a static method in a dll class

n.podbielski13-Oct-12 2:48

n.podbielski

13-Oct-12 2:48

Everybody was at some point. Don't worry about that.
Glad that could help.

No more Mister Nice Guy... >: |

Array.Contains

ASPnoob12-Oct-12 20:14

ASPnoob

12-Oct-12 20:14

Hello all, I've read that in dotnet framework 3.5 and above one can use the keyword Contains to check if an array has a particular value in one of it's elements. How do I check if an array contains a particular value in earlier versions of dotnet frameworks using C#? Thanks in advance.

modified 13-Oct-12 2:23am.

Re: 5C# 2008 Array.Contains

n.podbielski12-Oct-12 20:19

n.podbielski

12-Oct-12 20:19

linq method:

list.Contains(value);

http://msdn.microsoft.com/en-us/library/system.linq.enumerable.contains.aspx[^]

No more Mister Nice Guy... >: |

Re: Array.Contains

Shameel12-Oct-12 22:50

Shameel

12-Oct-12 22:50

Iterate through the array and do a match yourself:

for(int i=0; i < myArray.Length; i++) {
    if (myArray[i] == valueToCheck) {
        //Take action
        break;
    }
}

Re: Array.Contains

ASPnoob13-Oct-12 0:13

ASPnoob

13-Oct-12 0:13

Hi, thanks for replying. That is exactly what I'm looking for.

Re: Array.Contains

Shameel13-Oct-12 4:24

Shameel

13-Oct-12 4:24

Glad to be of help. Mark it as answer if that helped.

Re: Array.Contains

KiranKumar Roy14-Oct-12 1:04

KiranKumar Roy

14-Oct-12 1:04

Dear,
You can use below function to check if Value exist in array or not..

Function CheckIfValueExistInArray(ByVal strString As String) As Boolean
    Dim animals() As String = {"lion", "turtle", "ostrich"}
    If Array.IndexOf(animals, strString) <> -1 Then
        'if exist will then retrun True
        Return True
    Else
        'if does't exist then will retrun False
        Return False
    End If
End Function

Thanks

KiranKumar Roy

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