C / C++ / MFC

16-Dec-03 21:48

i've created a visual studio add in using the wizard.

i copied a method from other project (that i found here in code project) that retrieves the *.dsw file path.

here is the code:

CString CCommands::GetWorkspacePath()
{
	CWinApp* pApp = AfxGetApp();
	CString szWorkspace;

	POSITION posdt = pApp->GetFirstDocTemplatePosition();
	while (NULL != posdt)
	{
		CDocTemplate* pdt = pApp->GetNextDocTemplate(posdt);
		if (0 == strcmp("CProjectWorkspaceDocTemplate", 
			pdt->GetRuntimeClass()->m_lpszClassName))
		{
			POSITION posdoc = pdt->GetFirstDocPosition();
			if (NULL == posdoc) 
				break;

			CDocument* pdoc = pdt->GetNextDoc(posdoc);
			if (NULL == pdoc) 
				break;

			szWorkspace = pdoc->GetPathName();
			if (0 == szWorkspace.GetLength()) 
				break;
		}
	}

	return szWorkspace;
}

problem is that this line :

POSITION posdt = pApp->GetFirstDocTemplatePosition();

returns NULL for the postd. when i try this code in the other project it works ok

please, i already post this question before, and didn't get any reply

can any1 help me?

thanks in advanced

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

sam India16-Dec-03 22:06

sam India

16-Dec-03 22:06

you are getting Null value returned by
pApp->GetFirstDocTemplatePosition()
bcoz you are using the base class pointer, and the base class pointer in not aware your projects Doc Template positions. If you type cast it into your project's application class, it won't return null value;

CWinApp* pApp = AfxGetApp();
CString szWorkspace;
((MyPrjApp*)pApp)->GetFirstDocTemplatePosition();

never say die

YaronNir16-Dec-03 22:13

16-Dec-03 22:13

thanks for the response, that didn't work!

here is what i wrote and i got still a null:

CWinApp* pApp = AfxGetApp();
CString szWorkspace;
//POSITION posdt = pApp->GetFirstDocTemplatePosition();
POSITION posdt = ((CBackITUp_AddinApp*)pApp)->GetFirstDocTemplatePosition();

i even try the extern thing:

extern CBackITUp_AddinApp theApp;
.
.
POSITION posdt = theApp.GetFirstDocTemplatePosition();

that didn't work as well!!!

please please i need help

(try to create a new visual studio add in project in VC6, then try the lines above, you will get the same result.....i am doing something wrong, but i can't figure out what is wrong....

thanks again
Yaron

Ask not what your application can do for you,
Ask what you can do for your application

sam India16-Dec-03 22:48

sam India

16-Dec-03 22:48

CWinApp* pApp = AfxGetApp();CString szWorkspace;//POSITION posdt = pApp->GetFirstDocTemplatePosition();POSITION posdt = ((CBackITUp_AddinApp*)pApp)->GetFirstDocTemplatePosition();

this code runs well when i executed it in newly created project. i executed this code in CMainFrame class message handler function.

i suggest you to try this code in CMainFrame Class for testing purpose only

the problem could be in base class of CCommons class, you haven't mentioned anything about its base class.

never say die

YaronNir16-Dec-03 22:54

16-Dec-03 22:54

thanks for reply.

As I mentioned before, I am using a visual studio add in project the objects:

1. CBackITUp_AddinApp - the application
2. CCommands - the commands object
3. CDSAddIn - the developer studio add in object
4. ICommands - the commands interface

as you can see i am not using CMainFrame.....

I think I know what my problem is. the method GetFirstDocTemplatePosition will work only on the dev studio exe (the application which runs the add in) and not on the add in itself....
therefor when i am using

CWinApp* pApp = AfxGetApp()

I am getting a pointer to the add in (dll) main application object and not the exe main application object.....

now can you help?

thanks again

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

sam India16-Dec-03 23:58

sam India

16-Dec-03 23:58

according to me, you can solve the problem by creating a DLL project which has a fuction MyFunc() returning application object's address. Include this Dll in your addin and call MyFunc().

never say die

YaronNir17-Dec-03 1:10

Problems recompiling under VC.Net

17-Dec-03 1:10

Hi,

I am not sure i follow, can you show me code on how to do that?

thanks

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

James Spibey16-Dec-03 21:32

James Spibey

16-Dec-03 21:32

Hey Guys,

Yesterday I recompiled an MFC application in Visual C++.NET which had previously been built using VC6. Aside from a few casting issues, the compile seemed to work OK. However, the app will not execute. When I execute the app, the error I get is 0xC0000005: Access violation. The problem is that this exception is thrown before my app even gets into WinMain. The stack trace when the exception is raised is:-

<br />
NTDLL.DLL!_RtlRaiseStatus@4()  + 0x24	<br />
NTDLL.DLL!_LdrpInitialize@12()  + 0x15276	<br />
NTDLL.DLL!_KiUserApcDispatcher@20()  + 0x7

When I take a look in the output Window after execution I get.

First-chance exception at 0x77f92373 (NTDLL.DLL) in WMSClient.exe: 0xC0000005: Access violation writing location 0x00000010.<br />
First-chance exception at 0x7c59ba9d in WMSClient.exe: 0x000003E6: Invalid access to memory location.<br />
First-chance exception at 0x77f92373 (NTDLL.DLL) in WMSClient.exe: 0xC0000005: Access violation writing location 0x00000010.<br />
First-chance exception at 0x77fb17a4 (NTDLL.DLL) in WMSClient.exe: 0xC0000005: Access violation.<br />
Unhandled exception at 0x77fb17a4 (NTDLL.DLL) in WMSClient.exe: 0xC0000005: Access violation.<br />
The program '[1968] WMSClient.exe: Native' has exited with code 128 (0x80).

At first I thought it was maybe caused by one of the global variables causing problems but most of them are basic types. Those which are classes, I put a breakpoint in the constructor but it never gets called.

Can anyone suggest anything else to look at?

Cheers

James

Re: Problems recompiling under VC.Net

Prakash Nadar16-Dec-03 21:42

Prakash Nadar

16-Dec-03 21:42

I will tell you one thingk vs.net is a junk at its best....

My God is more powerfull Than Your God. (the line that divides the world)

many if else if

Jerome Conus16-Dec-03 21:23

Jerome Conus

16-Dec-03 21:23

Hi !

In my application, I had to test many strings and (as the keyword 'case' is not usable for strings) I did something like this :

if (MyString==THIS_STRING)
{
}
else if (MyString==THAT_STRING)
{
}
else if (MyString==ANOTHER_STRING)
{
...
...
...
else
{
}

The problem is that I have to compare my string with more than 128 possible strings, and I discovered this morning that the compiler (Visual C++ 6) is not able to cope with more than 128 if's !!!!

Any idea on what would be a nice workaround for this limitation ?

Thanks !
Jerome

jhwurmbach16-Dec-03 21:32

jhwurmbach

16-Dec-03 21:32

You could nest your Ifs, based in the first letter, then check for the second (and third...) letter in lower levels.
This way you can circumvent the limitation.

Who is 'General Failure'? And why is he reading my harddisk?!?

Re: many if else if [modified]

Prakash Nadar16-Dec-03 21:35

Prakash Nadar

16-Dec-03 21:35

It is the most simplest thing to do in programming live,
here it goes, create an array of all the strings taht you want to compare with,
then in a loop compare with each string and do appropriate action.(you can build your logic around this)

My God is more powerfull Than Your God. (the line that divides the world)

Marek Grzenkowicz16-Dec-03 23:44

Marek Grzenkowicz

16-Dec-03 23:44

How about switch... case... statement?

Although to be honest I like the idea of strings' array better. Unfortunately, it's not mine. Smile | :)

modified on Monday, November 29, 2010 6:02 AM

Ian Darling17-Dec-03 0:17

Ian Darling

17-Dec-03 0:17

chopeen wrote:
How about switch... case... statement?

Doesn't work with strings in C++, unless you merge with the strings array idea and lookup on the index.

I think my idea below is better Big Grin | :-D

--
Ian Darling
"The moral of the story is that with a contrived example, you can prove anything." - Joel Spolsky