pythonqt scriptint & orting to lower version - Managed C++/CLI Discussion Boards

Luc Pattyn12-Jan-11 17:21

12-Jan-11 17:21

I haven't checked the diagram against the datasheets or application notes from the manufacturer, you should if you haven't already. There aren't many ways to connect things up anyway.

kent5244 wrote:
Abusing the forum?

I suggest you read again the very first sentence I've replied in this thread.

Hmmm | :|

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

How to convert SAFEARRAY to System::Object

ptr_Electron12-Dec-10 23:19

ptr_Electron

12-Dec-10 23:19

May I know how to convert SAFEARRAY to System::Object,

error C2664: void .....(System::String ^,System::Object ^)' : cannot convert parameter 2 from 'SAFEARRAY *' to 'System::Object ^'

thanks

Re: How to convert SAFEARRAY to System::Object

Radhakrishnan G.14-Dec-10 20:06

Radhakrishnan G.

14-Dec-10 20:06

Marshal.GetObjectForNativeVariant Method[^]

How to use C DLL in C++/CLI

cancerion1-Dec-10 23:32

cancerion

1-Dec-10 23:32

Hi,

I m new to CLI ,
Can anyone tell me How to use C DLL in C++/CLI???

Thanks,
Sachin

Re: How to use C DLL in C++/CLI

Luc Pattyn2-Dec-10 1:00

Luc Pattyn

2-Dec-10 1:00

Google[^] will lead you.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

conversion

rajniyadav1a1-Dec-10 19:09

rajniyadav1a

1-Dec-10 19:09

how to convert tchar to lpcwstr

Re: conversion

Ajay Vijayvargiya1-Dec-10 21:12

Ajay Vijayvargiya

1-Dec-10 21:12

TCHAR is single unit, LPCWSTR would be set of units.
See this[^]

pythonqt scriptint & orting to lower version

appollosputnik25-Nov-10 16:41

appollosputnik

25-Nov-10 16:41

Dear Friends

I am facing some problems in deploying my application for lower version of qt.

Basically i want to generate scripts for my application and I have chosen pythonqt for this purpose. Pythonqt has the problem with lower version of Qt (Qt 4.5.2) and also with Higher version of Qt (Qt 4.7). So I needed to get another machine where I have installed Qt-4.6.3 with in-built python version 2.6. I am successfully able to generate my application exe and it is running.

But the requirement is that this exe should run on my original machine so I built the application with the static link of Qt4.6.3-static.

My original machine has python2.3 installed.

But I am not able run on original machine. Its giving 3 library linking problem. as below

libpng14.so.14 => not found

libEGL.so.1 => not found

libpython2.6.so.1.0 => not found

I have libpng12 installed in original system......I am keeping the libong14 from my new machine in a local lib folder and exporting LD_LIBRARY_PATH to/the/local/lib but still its not able to find the libpng14

similarly for libpython2.6 I am keeping the libpython2.6 from new machine into the local lib folder. but its not recognizing.

libEGL i dont even know.

Please give me some suggesstions what can be done.

Thanks sujan

Re: pythonqt scriptint & orting to lower version

Richard MacCutchan25-Nov-10 22:09

Richard MacCutchan

25-Nov-10 22:09

And what does this have to do with "Managed C++/CLI"?

Just say 'NO' to evaluated arguments for diadic functions! Ash

Delegates in Managed C++

ptr_Electron24-Nov-10 3:06

ptr_Electron

24-Nov-10 3:06

using namespace System::Runtime::InteropServices;

public ref class CTest
   {
       public:
           static delegate bool Callback(int i);

   }

While compliting I get error.

error C2144: syntax error : 'bool' should be preceded by ';'
I would like to use delegate as a callback function and select one of the serval avaliable function.
Please advice. thanks.

Re: Delegates in Managed C++

Dave Doknjas24-Nov-10 11:34

Dave Doknjas

24-Nov-10 11:34

Remove the 'static' keyword - it's the cause of the error (and add a semi-colon after the class closing brace).

David Anton
Convert between VB, C#, C++, & Java
www.tangiblesoftwaresolutions.com

Re: Delegates in Managed C++ [modified]

ptr_Electron24-Nov-10 17:00

ptr_Electron

24-Nov-10 17:00

Thanks a lot it worked. Smile | :)

Basically I need an advice. I am woking in dot net managed C++ . I had a very large switch statement with about 50 cases
now I am refactoring the switch case. putting each case in a function and using a delagate as callback and

main ()
{
	switch (ivar)
	{
		case 1:
		{
		 //somecode 1;
		break;
		}
		case 1:
		{
		 //somecode 2;
		break;
		}

		so on

		case 50:
		{
		 //somecode 50;
		break
		}
	}
}

And now I am writing function

void somecode1(int a, int b)
{
	somecode 1;
}
void somecode2(int a, int b)
{
	somecode 2;
}
void somecode3(int a, int b)
{
	somecode 50;
}

      static void Parse(int iType)
        {
            FunList entry  = m_FunList[iType];
            entry.m_Callback.Invoke();
        }

        static void Main(string[] args)
        {
            Init();
            //i=dynamic from 1 to 50  
            i=7 
            Parse(i);
        }
        static void Init()
        {
           //Inilize the FunList
           //set paramenters and function as properties
        }

Can you please correct me if I am doing some thing not correct?
Is there any pattern that suits better?

Thanks

modified on Wednesday, November 24, 2010 11:21 PM

I nead to pass an Interface from the C++ wrapper into a C# class

Ole Morten Heien22-Nov-10 12:03

Ole Morten Heien

22-Nov-10 12:03

Folks..
I have created a wrapper project that exports two procedures that I pick up in my Win32 program created in something called Clarion for Windows. The wrapper class calls my C# objects and this works just fine. Problem is that my C# program neads different calls back to my Clarion Win32 program. For instance, my Win32 program has a function to generate new Customer ID's and the complexity of this routine is to much. Becides, I would really like to know if there is a way to do this. The connection between Clarion Win32 and C++ is by using a standard interface decleared in Clarion and passed into the exported function in C++. Problem is that I dont know how to call back to C++

Hers what I have:

Clarion(Win32) <=> C++ => C#

So Clarion can call C++ methods directly through the Interface, and therfor implicit Clarion can call .NET methods through this wrapper. But I nead the other way too.

I was hoping I could pass an Interface from C++ into my C# objects, maybe something like this:

MyNetClass::TakeCppInterface(ThisCppInterface);

I have posted on the MSDN, but only answer I got there was using MSIL or reflection, which i think is way over my head at the moment.

-----------------------------
Speaking nordic language?
Why not visiting irc.c-c.no and join #C# or #VisualBasic
-----------------------------

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Radhakrishnan G.14-Dec-10 19:52

Radhakrishnan G.

14-Dec-10 19:52

You can use a C++/CLI wrapper instead of C++ wrapper so that C++/CLI wrapper can use directly in C#

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Ole Morten Heien14-Dec-10 23:34

Ole Morten Heien

14-Dec-10 23:34

Well, isnt that what I allready do Wink | ;-)

I nead to call back to C++ from the C#

Her's the flow:
Clarion(Win32) Calls C++ method.
C++ then calls C# method.
C# Method calls C++ Method.
C++ Method Calls Clarion(Win32) Method

now, Clarion and C++ can comunisafe over an Interface
C++ and C# communicates through a class
But what can I use to communicate C# to C++ ?

-----------------------------
Speaking nordic language?
Why not visiting irc.c-c.no and join #C# or #VisualBasic
-----------------------------

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Radhakrishnan G.17-Dec-10 2:31

Radhakrishnan G.

17-Dec-10 2:31

can you provide a code snippet

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Philippe Mori10-Mar-11 15:40

Philippe Mori

10-Mar-11 15:40

Well the solution depends on the dependencies between DLL.

Assuming that Clarion is using a DLL with C++/CLI code and that DLL is using a C# DLL, then you would also define an interface in C# DLL that will be implementend by C++ code when calling back into C++.

Delegates or events could also be used in some cases. This is particulary interesting if for each C# method, you already know which (single) method would be called during processing.

Philippe Mori

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Ole Morten Heien10-Mar-11 21:21

Ole Morten Heien

10-Mar-11 21:21

Yes. This is what I had in mind..

But I'm not sure how to implement a C# interface in C++. As far as I know, the C# Interface is not C++ compatible becasue C++ actually dont have interfaces (i'm a noob in C++ so this statement is based on things I have read etc.)

-----------------------------
Speaking nordic language?
Why not visiting irc.c-c.no and join #C# or #VisualBasic
-----------------------------

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Philippe Mori11-Mar-11 2:47

Philippe Mori

11-Mar-11 2:47

To implement the interface just derive from it as you would do in C#.

Philippe Mori

Re: I nead to pass an Interface from the C++ wrapper into a C# class

Ole Morten Heien11-Mar-11 2:48

Ole Morten Heien

11-Mar-11 2:48

I wil take this under consideration If I reopen the project. As by now, the whole thing is done using a .NET EXE and parameters

-----------------------------
Ole Morten Heien
HD Software / Advisor AS
-----------------------------

How to Get Function argument names in mangle data?

mathivanaan21-Nov-10 21:18

mathivanaan

21-Nov-10 21:18

Hi

I am using UnDecorateSymbolName() method get function name and argument data type. but i want actual argument variable name? i try this code like

void ExtractCppSymbol(char *szDecoratedName)
{
char szFunc[512];

if ( UnDecorateSymbolName(szDecoratedName, szFunc, 512, UNDNAME_COMPLETE > 0 ))
{
cout<

Re: How to Get Function argument names in mangle data? Crosspost

Richard MacCutchan21-Nov-10 22:21

Richard MacCutchan

21-Nov-10 22:21

Please do not post the same question in multiple forums. This has already been answered under C++.

Just say 'NO' to evaluated arguments for diadic functions! Ash

How to determine an inherited managed class in C++ [modified]

Juri Loosme20-Nov-10 4:12

Juri Loosme

20-Nov-10 4:12

Hi,
In my C++ app I'm recieving callbacks from managed code when some events are raised in a .NET control.

void CGraphControlView::ObjectDoubleClicked(System::Object^ sender, Northwoods::Go::GoObjectEventArgs^ e)
{
	TRACE(_T(" Graph object double clicked\n"));
}

- How do I determine if the e->Object is of some class inherited from System::Object e.g. a GraphNode declared as:

public class GraphNode : GoBasicNode    // GoBasicNode is inherited from System::Object

?

/Juri

modified on Saturday, November 20, 2010 11:58 AM

Re: How to determine an inherited managed class in C++

Nish Nishant20-Nov-10 5:55

Nish Nishant

20-Nov-10 5:55

Call GetType and then check the IsClass property.

Regards,
Nish

My technology blog: voidnish.wordpress.com

Re: How to determine an inherited managed class in C++

Juri Loosme20-Nov-10 6:25

Juri Loosme

20-Nov-10 6:25

Hi Nish,
I'm more or less a newbe in .NET and C#, could you show an example of how to do that.

Like

if (e->GetType() ..... then what ?

Regards
/Juri

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