C / C++ / MFC

5-Apr-06 4:56

Greetings:

I have recently started using Visual Studio V7.0 (previously used V6.0), but still using MCF. I have continued to use CString for various things text storage but today I tried to use the "Find" member function.

What happened? VS 7.0 doesn't even seem to document CString and its members anymore. When I tried to build my program, I get this error:

error C2664: 'int ATL::CStringT<basetype,stringtraits>::Find(ATL::CSimpleStringT<basetype,t_bmfcdll>::XCHAR,int) throw() const' : cannot convert parameter 1 from 'const TCHAR *[7]' to 'ATL::CSimpleStringT<basetype,t_bmfcdll>::XCHAR'
with
[
BaseType=char,
StringTraits=StrTraitMFC_DLL<char>,
t_bMFCDLL=true
]
and
[
BaseType=char,
t_bMFCDLL=true
]
This conversion requires a reinterpret_cast, a C-style cast or function-style cast

Huh?

Can someone tell me how I can just use my faithful CString and get back to work?

Thanks in advance,
Mark

-- modified at 11:00 Wednesday 5th April, 2006

toxcct5-Apr-06 5:00

5-Apr-06 5:00

your program certainly have a MFC support lack...

Jethro635-Apr-06 5:12

5-Apr-06 5:12

Hi;

The program was initialized using the MFC App Wizard. It has a main window, menus, tool bars, status bars, etc, etc. All of them MFC classes. I have been using CString throughout until today when I tried to use "Find".
Mark

toxcct5-Apr-06 5:14

5-Apr-06 5:14

CString[^] is still documented.

but you might be missing to #include <afx.h>

Jethro635-Apr-06 5:26

5-Apr-06 5:26

Nope, its there. Its embedded in "stdafx.h". Furthermore, when I type CString in the index, there are several items listed but there is nothing that pertains to the documentation that you would expect to see for a supported class: namely "Members" and "Overview". They keep referring to some new class called CStringT.

David Crow5-Apr-06 5:26

David Crow

5-Apr-06 5:26

CStringT is now a shared class between MFC and ATL. You need to include cstringt.h.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Jethro635-Apr-06 5:39

5-Apr-06 5:39

Didn't work. Same error.

Are you saying that I have to use CStringT now? This can't be! The dialog control, where I am having this problem, contains a simple edit box. When I use the "Add Member Variable Wizard" to associate a variable with my edit box, I select "Value" for the category. It automatically sets the type to CString. I have been using CStrings throughout my program successfully until this morning. The problem has appeared only because I want to search the string.

It is saying that I must use a PCXSTR pointer as the parameter. I have looked at the documentation for this but I cannot see how to convert a simple, NULL terminated string into one of these. Also, I cannot event get the compiler to recognize PCXSTR.

Any ideas?
Thank you,
Mark

toxcct5-Apr-06 5:43

5-Apr-06 5:43

CString IS CStringT !!! Sigh | :sigh:

it is like this for unicode uses...

Jethro635-Apr-06 5:59

5-Apr-06 5:59

Listen, I appreciate your help. I'm not trying to be contentious. You obvious know more about this that I do, however, I cannot see how you can say that "CStringT IS CString".

I'll just take my existing dialog header file and include a member variable:

CStringT m_strHello;

Here is the avalanche of errors that this generates:

c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.h(48) : error C2955: 'ATL::CStringT' : use of class template requires template argument list
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\cstringt.h(2245) : see declaration of 'ATL::CStringT'
DecodedLogDlg.cpp
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.h(48) : error C2955: 'ATL::CStringT' : use of class template requires template argument list
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\cstringt.h(2245) : see declaration of 'ATL::CStringT'
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.cpp(59) : error C2512: 'ATL::CStringT' : no appropriate default constructor available
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.cpp(63) : error C2662: 'ATL::CStringT<basetype,stringtraits>::~CStringT' : cannot convert 'this' pointer from 'ATL::CStringT' to 'ATL::CStringT<basetype,stringtraits> &'
Reason: cannot convert from 'ATL::CStringT' to 'ATL::CStringT<basetype,stringtraits>'
Conversion requires a second user-defined-conversion operator or constructor

How can it be the same?
Mark

toxcct5-Apr-06 6:15

5-Apr-06 6:15

Jethro63 wrote:
I cannot see how you can say that "CStringT IS CString".

the CString library is more complicated, but simply consider this :

#define CString CStringT

David Crow5-Apr-06 5:56

David Crow

5-Apr-06 5:56

Jethro63 wrote:

Didn't work. Same error.

How are you calling the Find() method?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Jethro635-Apr-06 6:10

can i use shellexecute() method?

5-Apr-06 6:10

I have just realized the problem and it is so stupid that I can hardly belive my eyes: The pointer to the NULL terminated string that I was passing as parameter 1 was NOT a pointer to an NULL terminated string. It was a pointer to an array of pointers to NULL terminated strings.

I will now go and look for another line of work.
Thanks for trying to help an idiot.
M.

baldha rakesh5-Apr-06 4:28

baldha rakesh

5-Apr-06 4:28

i have to execute a executable file which is downloaded from a given URL but when use createprocess() method then it execute successfully at 2000 OS but it does't execute on XP OS

and now i am using shellexecute() method for executing this file but it executes successfully at both OS and now problem is that this correct way or not

and please tell me what is the difference between those functions.

Bankey Khandelwal
Software Engineer

Re: can i use shellexecute() method?

toxcct5-Apr-06 4:32