using for_each - ATL / WTL / STL Discussion Boards

VictorPr19-May-04 21:22

19-May-04 21:22

Hello All.

I'm have the next task:

I'm must to write an ActiveX component using C++ ATL.
This component must using SOAP client for working with WebService writed on C#.
For work with WebService from my component I must to use ASP.NET page SessionId.
This ID must be set as current SessionId(HINTERNET) handler for SOAP client.
But. C# SessionId it is string type. How I may convert C# SessionId to HINTERNET for using.

Thanks.

P.S. Sorry for my English.

amazon upload need help...

Sumit Kapoor19-May-04 19:59

Sumit Kapoor

19-May-04 19:59

Hi Dear...

I struck in a problem & I know you can help me..
I've a pro-merchant account in amazon..& I want to upload Inventory to amazon.. but getting problem..File Error..even from site upload...

Can you send me Execl file you used for that uploading...

+ if possible some coding snippet of uploading invenorty. I want to upload through coding.. send me at:

sumit_kapoor1980@hotmail.com

or chat with me at hotmail account or yahoo: sumit_kapoor1980@yahoo.com

I hope you will help me..
Thanks
Have a Nice Life..

Sumit Kapoor.

---Sumit Kapoor---

Re: amazon upload need help...

Steve S19-May-04 22:29

Steve S

19-May-04 22:29

Is it just me, or is anyone else getting irritated by this...

Steve S
Developer for hire

Re: amazon upload need help...

Sumit Kapoor19-May-04 22:47

Sumit Kapoor

19-May-04 22:47

it takes 1 week..still no solution..can you provide any hint...
Thanks...

---Sumit Kapoor---

Re: amazon upload need help...

Steve S20-May-04 4:34

Steve S

20-May-04 4:34

Here's a hint.
Don't crosspost to every topic, it annoys people, and hence, makes them feel less inclined to help.

Steve S
Developer for hire

Re: amazon upload need help...

Sumit Kapoor20-May-04 4:42

Sumit Kapoor

20-May-04 4:42

HI thanX...
I hate when no one help me... I'm trying from 1 week & posted in vc++ five time..no one reply...
so today..i posted to all..so that may be any other forum person know...

may be no know...

OK! Bye..sumit

---Sumit Kapoor---

how to diasable a button

mike shen19-May-04 16:37

mike shen

19-May-04 16:37

hello,
I declare a class --- class CMainDlg :public CDialogImpl<cmaindlg>
{
enum {IDD = ...}
HWND m_hBtnApply;
......
}

the m_hBtnApply is the corresponding object of a resource IDC_APPLY in the resouce editor

I want to disable the IDC_APPLY in OnInitDialog message handler:
m_hBtnApply = GetDlgItem(IDC_APPLY);
::EnableWindow(m_hBtnApply,FALSE);

but it can reach the effects i wanted.while in MFC ,such code can do.

anybody can tell why?

mike shen

using for_each

paulb19-May-04 15:13

paulb

19-May-04 15:13

I have this explicit loop:

FileMap::iterator it;
for (it = outputFiles.begin(); it != outputFiles.end(); it++)
{
	it->second->close();
}

where FileMap is a map<string,ofstream*>, so the loop is just going through all the stream pointers and calling close() on them

is it possible to implement this using for_each?, I tried this but got compiler errors:

for_each(outputFiles.begin(), outputFiles.end(), std::mem_fun<void, std::ofstream>(&std::ofstream::close));

Re: using for_each

valikac19-May-04 18:36

valikac

19-May-04 18:36

map is a key/value type of container. Try a vector or something one dimensional.

Kuphryn

Re: using for_each

Andrew Walker19-May-04 22:10

Andrew Walker

19-May-04 22:10

Yes, it is doable, but not using 'clean' STL design ideas. remember that the type of the element in the map is std::pair<string,ofstream*>, not just ofstream or ofstream*, so you need to compensate for that. The easiest way I can think of is to use lambda expressions (see boost::lambda for a comprehensive library).

Personally, I feel that lambda libraries are shakey ground at the moment. Most developers have enough trouble reading normal STL constructs without adding in strange things like '_1'and '_2' - but it depends on how comfortable with STL you and your co-workers are.

Just as an aside, are you sure that you really want to do this? Assuming that you dynamically creating the files why don't you rely upon the destructors to close the files for you - if this is the behavior that you want use boost::shared_ptr to keep a reference counter handle to the files, and when the map goes out of scope, all the files will be taken with it. The only other reason I can think that you would want to do this is to reuse the files, if you are doing this make sure that you test thoroughly Herb Sutter (the convenor of the C++ standards committee) documented some interesting 'features' (read: issues) of ofstream's after they have recycled in a recent issue of the C/C++ Users Journal.

After all that, if you're prepared to compromise on a 'dirty' rewrite for_each to work nicely with pairs, use the normal loop or try the following:

void closer(const std::pair<string,ofstream*>& toClose)
{
    toClose.second->close();
}

for_each(outputFiles.begin(), outputFiles.end(), closer);

In this case I think your original loop really does make things a lot clearer than it would otherwise be.

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

Re: using for_each

paulb20-May-04 13:14

paulb

20-May-04 13:14

Thanks for that, that has cleared things up a lot for this STL newbie.

I am trying to make more use of the STL algorithms in my code, but in this case I will stick with the for loop, for clarity.

Re: using for_each

Jörgen Sigvardsson23-May-04 12:01

Jörgen Sigvardsson

23-May-04 12:01

There is another thing you could add to Andrew's answer, without pulling in "weird lambda" stuff. This is what I'd do.

Add a function called select_second like this:

template <typename TPair>
struct select_second : public std::unary_function<TPair, typename TPair::second_type> {
      result_type operator()(argument_type p) const {
      return p.second;
   }
};

then add a composer function like this:

// It takes 2 functors, f and g, and compose them into f o g, i.e., f(g(x))
template <typename F, typename G>
struct composed_fn : public std::unary_function<typename G::argument_type, typename F::result_type> {
   const G& g;
   const F& f;
   composed_fn(const F& f_, const G& g_) : g(g_), f(f_) { }
 
   result_type operator()(argument_type x) const {
      return f(g(x));
   }
};
 
template <typename F, typename G>
composed_fn<F, G> compose(const F& f, const G& g) {
   return composed_fn<F, G>(f, g);
}

Then you ought to be able to do something like:

for_each(outputFiles.begin(), outputFiles.end(), compose(std::mem_fun(&std::ofstream::close), select_second<FileMap::value_type>()));

I'm not sure if functional composition is possible in boost without the use of the "obscure" lambda library. If it is, please use boost instead. It's good and solid code. However, I've used this code myself for a while, and I've found it to be useful. It's easy to follow and understand if you have a grasp of templates and functors. f(g(x)) shouldn't be a surprise to anyone, it's basic high school mathematics. Smile | :)

--
Booohoo!

Re: using for_each

Andrew Walker23-May-04 20:05

Andrew Walker

23-May-04 20:05

Thanks Jörgen, answers like this are why I love CodeProject, fully deserving of a five.

Time to go back and fix some of that old code...

Boost::Compose[^] Has been deprecated in favour of bind and lambda btw

Smile | :)

Re: using for_each

Jörgen Sigvardsson24-May-04 10:56

Jörgen Sigvardsson

24-May-04 10:56

Thanks for your kind words. Smile | :)

Real soon now, I will be ending a java project (at least my involvement in it), and go straight back to C++. I can't wait. Wink | ;)

I have a bunch of header files with code for dealing with composition. With a bit of luck, I'll see if I can gather enough strength and will to write an article about it later on. Sure, there's always boost, but I figure I can show the concepts of functional composition if I used my own code. I think just the awareness of these tricks makes STL a lot easier and more enjoyable to work with.

--
Booohoo!

ATL & ActiveX & HTTP Session

VictorPr19-May-04 2:37

VictorPr

19-May-04 2:37

Hello all. Tell me please can I get the http session which was created by ASP.NET page from my ATL ActiveX component and work with it? Thanks.

ATL DLL not showing in COM+

parkerpkthn18-May-04 11:18

parkerpkthn

18-May-04 11:18

Alright,
I've taken an existing VC6 C++ COM dll which uses MFC libraries, converted it to VC 7 and added the ATL COM+ class. It compiles fine. However when I try to drag and drop it into COM+, I see nothing visually show up. I looked at the registry and it does register the ATL dll. I also took another ATL Dll, downloaded it's source code, and recompiled. Then dragged and dropped it into COM+ and the classes and interfaces show up so this to me means I don't have any issues as far as the present of the necessary dlls. Specifically atl.dll.

The ATL dll that I used as an example that works is much smaller than the one I'm creating and it doesn't use the MFC library but from everything I've read that shouldn't make a difference.

One final note: I did add the ATL DLL manually instead of using drap-n-drop and it displays the class but no interfaces are present.

Paul

COM Server/Service

shekar_raja17-May-04 18:26

shekar_raja

17-May-04 18:26

Hi All

Is it possible to develop a COM server as a/service which would start when a client instantiates an object of it?
I know this is possible in theory, but I've tried doing it, by creating a Service using ATL COM Wizard and then adding an ATL Object.
From the client, I tried to instantiate an object of this exposed interface. But the service does not start up and the pointer returned to me in the client is NULL.

Can anyone help me provide pointers?

Thanks in advance,

Cheers
Raja

Re: COM Server/Service

Anonymous17-May-04 19:03

Anonymous

17-May-04 19:03

Here, take a look at this http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_atl_atl_services.asp

Hope this helps.

Re: COM Server/Service

shekar_raja18-May-04 15:13

shekar_raja

18-May-04 15:13

Hi Thanks heaps !

I was trying to instantiate an instance using VC++ and CoCreateInstance. Maybe I could not get the CLSID of the class correctly.
I used VB client and it works fine ! Smile | :)

)

Many a thanks,
However, can you tell me how to get the CLSID of a class id to use it with the CoCreateInstance. I tried CLSID<>, __uuidof <>, but no luck Frown | :-(

I tried using the Smart pointers too.

Cheers
Raja

adding property to ATL HTML control

Abhi Lahare16-May-04 22:16

Abhi Lahare

16-May-04 22:16

hi all,

I want to add a property to HTML Control. which set some of data member
m_myvar of the control.
From html page i want to set this m_myvar from the HTML page
Some thing which can be used as follwed:

<object id="MyHTMLcontrol" classid="CLSID:here goes my CLSID " param="" name="m_myvar" value="some value " width="100%" height="100">

how i can do the same.

Thanks
Abhishake

set activeX property using param.in HTML page

Abhi Lahare18-May-04 3:58

Abhi Lahare

18-May-04 3:58

hi all,

Here this is what i have done so far.

1.Created a Full control using ATL app Wizard. MyATLFullCntrl

2. Added following line to the list of Classes that the MyATLFullCntrl
public IPersistPropertyBagImpl</code> <code> <MyATLFullCntrl>

3. Added Entry in COM_MAP
COM_INTERFACE_ENTRY(IPersistPropertyBag)

4) Added a Property using add property
Type: BSTR
Name: Url

5) Implement the get and put methods in the .cpp file:
STDMETHODIMP MyATLFullCntrl::get_Url(BSTR *pVal)
{
return S_OK;
}
STDMETHODIMP MyATLFullCntrl::put_String(BSTR newVal)
{
return S_OK;
}
6) Add the following entry to the PROP_MAP:
PROP_ENTRY("Url", 1, CLSID_NULL)

With this setup I am opening the web page with Object tag Embeded
<HTML>
<HEAD>
<TITLE>ATL 3.0 test page for object MyATLFullControl</TITLE>
</HEAD>
<BODY>
<OBJECT ID="MyATLFullControl" CLASSID="CLSID:XXXXx-XXXX-XXX" HEIGHT=100 WIDTH=100 >
<PARAM NAME="Url" VALUE="abc">
</OBJECT>
</BODY>
</HTML>
but when i debug ,the control is not at the put_Url() function. Confused | :confused:

Can anybody point me where i am wrong?

Thanks in advance,
Abhishake

Success is simply a matter of luck. Ask any failure.
--Earl Wilson

Sliders and Editboxes in WTL???

Member 15847216-May-04 20:15

Member 158472

16-May-04 20:15

Hi,

when I design a dialog in a WTL project, what's the equivalent of a CSliderCtrl to control a Slider on a dialog and how do I get the contents of an edit box?
Another question is, how do I work that out with the resource editor within Visual Studio?

Thanks,

Peter

WTL - 7.5 Released - Open Source

Ed Preston15-May-04 5:50

Ed Preston

15-May-04 5:50

Did not see this on the message board so...

http://sourceforge.net/projects/wtl/

The message board for the project has some news links. Here is another.

http://story.news.yahoo.com/news?tmpl=story&cid=74&ncid=738&e=9&u=/cmp/20040514/tc_cmp/20300961

I did not beleave it at first either. Do some reading.

Re: WTL - 7.5 Released - Open Source

Jörgen Sigvardsson15-May-04 12:57

Jörgen Sigvardsson