Re: _variant_t to CStringArray - C / C++ / MFC Discussion Boards

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Re: Debug Assertion Failed in atlcomcli.h.

Le@rner30-Jun-09 23:46

Le@rner

30-Jun-09 23:46

i m using this before the specified line

spMsgStore-&gt;Release();

but it gives error

error C2248: 'ATL::_NoAddRefReleaseOnCComPtr<T>::Release' : cannot access private member declared in class 'ATL::_NoAddRefReleaseOnCComPtr<T>'
1>        with
1>        [
1>            T=IMsgStore
1>        ]
1>        C:\Program Files\Microsoft Visual Studio 9.0\VC\ce\atlmfc\include\atlcomcli.h(87) : see declaration of 'ATL::_NoAddRefReleaseOnCComPtr<T>::Release'
1>        with
1>        [
1>            T=IMsgStore
1>        ]

so please help me for this.

thanks.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: Debug Assertion Failed in atlcomcli.h.

«_Superman_»30-Jun-09 23:56

«_Superman_»

30-Jun-09 23:56

Try spMsgStore.Release

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Debug Assertion Failed in atlcomcli.h.

Le@rner30-Jun-09 23:59

Le@rner

30-Jun-09 23:59

Thanks.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

_variant_t to CStringArray

Davitor30-Jun-09 21:13

Davitor

30-Jun-09 21:13

Hi All

i have

_variant_t data

type variable,which have contain 10 values.Like this

[0,0] = BSTR = 0x0017a66c "Name"
[0,1] = BSTR = 0x0017a6ec "Age"
[0,2] = BSTR = 0x0017a6ec "Class"
...

data is a SAFEARRAY containing BSTR elements.so how can i convert _variant_ to CStringArray?
Plz help me

Re: _variant_t to CStringArray

CPallini30-Jun-09 21:29

CPallini

30-Jun-09 21:29

See for instance [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: _variant_t to CStringArray

Stuart Dootson30-Jun-09 21:53

Stuart Dootson

30-Jun-09 21:53

There are useful classes wrapping SAFEARRAYs - see here[^] and here[^].

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: _variant_t to CStringArray

Davitor1-Jul-09 2:03

Davitor

1-Jul-09 2:03

thanks for reply but it's not helpfull for my problem.So plz help me

Re: _variant_t to CStringArray

Stuart Dootson1-Jul-09 2:34

Stuart Dootson

1-Jul-09 2:34

Those links are actually helpful, because they give you C++ wrappers for SAFEARRAYs that will simplify the job of converting the SAFEARRAY to some other array of strings.

CComSafeArray<BSTR> safearrayOfBstr(((VARIANT)data).parray);

will wrap the SAFEARRAY contained in the VARIANT.

You can then use the CComSafeArray methods to access the SAFEARRAY data.

This article[^] is very useful, because it gives easier access to 2D SAFEARRAYs, which is what you've got here.

Thing is, it's up to you to do that final step of converting to your CStringArray - but all you need to do is iterate through the relevant elements of the SAFEARRAY, extract the BSTR, convert it to a CString and store that in your CStringArray - not tricky, really!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

How to install windows updates WUA api

ashish8patil30-Jun-09 21:11

ashish8patil

30-Jun-09 21:11

Hello All,
I am using wua api.
1)using IupdateSearcher->Searcher I am searching updates that are require,
2)After that I getting download url of respective updates.
3)using UrlDownloadToFile i am downloading .exe .cab .psf file for respective updates.

Now I want to install these file to PC (.exe,.psf,.cab) how should I do please help me.

I know i updates install but I want to do it above way.

Thank You All,
ashish p.

Re: How to install windows updates WUA api

Stuart Dootson30-Jun-09 22:09

Stuart Dootson

30-Jun-09 22:09

exe is obvious - run it with ShellExecute or CreateProcess.

A cab file is an archive that needs to be unpacked before you run some installer inside it.

No idea what a PSF file is?!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to install windows updates WUA api

ashish8patil30-Jun-09 22:47

ashish8patil

30-Jun-09 22:47

Thanks for reply
cab file containing many ._p Files ,manifest file, psm file

Re: How to install windows updates WUA api

Stuart Dootson30-Jun-09 22:55

Stuart Dootson

30-Jun-09 22:55

Well, work out what you would do to install them manually and replicate that. It's not rocket science. Think about it.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Merge sort for files (C++ realization)

alikalik30-Jun-09 21:05

alikalik

30-Jun-09 21:05

Hello,

For example, I have files with sorted numbers. One way to merge them and save a sorted order is to use a merge sort algorithm. Where a C++ realization of the algorithm (for files, not for memory) can be found ?

Re: Merge sort for files (C++ realization)

CPallini30-Jun-09 21:16

CPallini

30-Jun-09 21:16

alikalik wrote:
Where a C++ realization of the algorithm (for files, not for memory) can be found ?

For instance you may develp it. You are a developer, aren't you?
Smile | :)

Re: Merge sort for files (C++ realization)

KarstenK30-Jun-09 21:34

KarstenK

30-Jun-09 21:34

you could find it here.... Cry | :((

Press F1 for help or google it.
Greetings from Germany

Re: Merge sort for files (C++ realization)

Stuart Dootson30-Jun-09 21:42

Stuart Dootson

30-Jun-09 21:42

Wikipedia[^] has an algorithm for merge-sorting from tape files - that should be sufficient for you to write an implementation.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Merge sort for files (C++ realization)

Chandrasekharan P30-Jun-09 23:47

Chandrasekharan P

30-Jun-09 23:47

alikalik wrote:
Where a C++ realization of the algorithm (for files, not for memory) can be found ?

That is good way of asking how can it be done Smile | :)

Re: Merge sort for files (C++ realization)

David Crow1-Jul-09 3:04

David Crow

1-Jul-09 3:04

alikalik wrote:
Where a C++ realization of the algorithm (for files, not for memory) can be found ?

How would you do it without a computer? If you had two stacks of paper containing names, how would you go about merging those two stacks together into one?

Now if you are having trouble with accessing arrays and swapping items in them, don't bother with sorting until you get over that hurdle.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

genetic algorithm(G A)

luckykhan30-Jun-09 20:59

luckykhan

30-Jun-09 20:59

hi i have a project of schedulling for a university through genetic algorithm.
can anyone help me out.
thanx in advance. Frown | :(

Re: genetic algorithm(G A)

Cedric Moonen30-Jun-09 21:07

Cedric Moonen

30-Jun-09 21:07

Maybe...

Seriously, if you want help ask a precise question. Please, read the posting guidelines ("How to get an answer to your question") for some tips on how to format your question properly.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: genetic algorithm(G A)

Rajesh R Subramanian30-Jun-09 22:58

Rajesh R Subramanian

30-Jun-09 22:58

You haven't searched CodeProject, have you? See Genetic Algorithm Library[^]

It is a crappy thing, but it's life -^ Carlo Pallini

Re: genetic algorithm(G A)

David Crow1-Jul-09 3:07

David Crow

1-Jul-09 3:07

Have you tried:

void main( void )
{
    std::cout << "This is my genetic algorithm scheduling project for university." << endl; 
    std::cout << "I have learned a lot from it." << endl; 
}

running a application as service

rahuljin30-Jun-09 20:40

rahuljin

30-Jun-09 20:40

hello,

i have a working vc++ application(few kilobytes) which i want to run as a service. please guide me how to do this ? is there any way to create an installer for it ?

btw thanks

rahul

Re: running a application as service

Madhu Nair30-Jun-09 20:46

Madhu Nair

30-Jun-09 20:46

How to: Create Windows Services[^] (C++ Programming)

Re: running a application as service

Harsh Shankar30-Jun-09 21:00

Harsh Shankar

30-Jun-09 21:00

Madhu Nair wrote:
How to: Create Windows Services[^] (C++ Programming)

Sorry Madhu, but i don't think it gives any good light on what the question is Frown | :(

HARSH

Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

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