Re: Need help using SafeArray/VARIANT from ASP/VBScript client - ATL / WTL / STL Discussion Boards

Re: Unsorted Map and Multimap :: STL

valikac21-Dec-02 12:50

valikac

21-Dec-02 12:50

Okay. Thanks.

Kuphryn

Packaging a VC++ Software

xxhimanshu21-Dec-02 1:46

xxhimanshu

21-Dec-02 1:46

hi all,

i am stuck. I want to make a setup for my VC application as we have in VC. But can't find anything helpful.
if anyone can suggest me anything would be a great help.
thanks in advance

Himanshu

Re: Packaging a VC++ Software

Anatoly Ivasyuk24-Dec-02 5:57

Anatoly Ivasyuk

24-Dec-02 5:57

There is a large variety of setup toolkits to fit any budget. We use Wise InstallBuilder but there are a number of lower-cost options as well. For example take a look at InnoSetup. For a list of others, visit any popular download site such as download.com or tucows.com.

-Anatoly

Anatoly Ivasyuk is co-founder of DTLink Software, a company specializing in Internet software and technologies. He is the author of DTLink's Windows products: AnswerTool, FAQTool, AppUpdate, and Personal Stock Monitor

serialize using stream. - binary

magicast20-Dec-02 2:48

magicast

20-Dec-02 2:48

hi~
I apologize being not good at English.

I wanna serialize my own data for network/file/etc...

I thought that stream of c++ standard library is suitable.
but, there's no facilities exactly for my use.

1. I wanna store stream data into memory.(not file)
2. insertion and extraction must operate in binary mode.

// example of usage
// proc A
omystream ms; // mystream is that I wanted..
int n = 1;
short s = 2;

ms << n << s;
// or ms << int_b(n) << short_b(s);
// int_b(), short_b() is custom manipulators

::send(ms.buf(),...); // send to network

// proc B
BYTE buf[4096];

::revc(buf,...); // receive from network

imystream ms(buf, dwSizeReceived); // dwSizeReceived = 6

int n;
short s;

ms >> n >> s; // n = 1, s = 2
// or ms >> int_b(n) >> short_b(s);

// result
data occupy 6 bytes memory. (4 for n(int), 2 for s(short))
send and receive 6 byte of memory.
memory layout:
00 00 00 01 00 02 // 6 byte
not
"000000010002" // 12 byte

this mean not string but binary.

how can I achieve it?
derive strstream or stream?
derive stream_buf?
I need your advice. Smile | :)

thanks in advance.

Re: serialize using stream. - binary

AlexO20-Dec-02 4:04

AlexO

20-Dec-02 4:04

What you are looking for is ::CreateStreamOnHGlobal.
You might consider SAFEARRAY(BYTE) as well (instead of).

Re: serialize using stream. - binary

Ben Burnett5-Jan-03 13:17

Ben Burnett

5-Jan-03 13:17

The simplest way would be to deliminate all the data. In the case of streams, it would be easiest to use spaces, as the stream's default behaviour is to skip them.

ostringstream out;

int   n = 1;
short s = 2;

out << n << ' ' << s;

// send the string over the network ( out.str () )

istringstream in ( out.str () );

n = s = 0;

in >> n >> s;

cout << "n = " << n << ", s = " << s << endl;

cheers,
-B

Need help using SafeArray/VARIANT from ASP/VBScript client

bahruddina19-Dec-02 16:20

bahruddina

19-Dec-02 16:20

hi,

I'm developing ATL ActiveX DLL that used by ASP/VBScript client.
This server uses VARIANT as a parameter input :

//idl<br />
HRESULT UseThis([in] VARIANT StringParam, [out, retval] long *ret);<br />
<br />
//cpp<br />
STDMETHODIMP CObj::UseThis(VARIANT StringParam, long *ret)<br />
{<br />
	//mark as NOT OK<br />
	*ret = 1;<br />
<br />
	// Be sure we have an array of strings.<br />
	if((StringParam.vt & VT_ARRAY) && (StringParam.vt & VT_BSTR))<br />
	{		<br />
		SAFEARRAY *pString = StringParam.parray;<br />
		BSTR *bstrArray;<br />
		CComBSTR bstrRet;<br />
		// Lock it down.<br />
		SafeArrayAccessData(pString, (void**)&bstrArray);<br />
		<br />
		// Read each item.<br />
		for(ULONG i = 0; i < pString->rgsabound->cElements; i++)<br />
		{<br />
			bstrRet = bstrArray[i];	<br />
		 }<br />
		// Unlock it.<br />
		SafeArrayUnaccessData(pString);<br />
		SafeArrayDestroy(pString);<br />
<br />
		//mark as OK<br />
		*ret = 0;<br />
	}<br />
<br />
	return S_OK;<br />
}

When I try to use the function from VB client it OK, but when used from ASP/VBScript client it just FAILED ! Confused | :confused:

VBscript client running on IIS:

Dim obj<br />
Dim ret<br />
Dim strParam(2)<br />
<br />
    Set obj = Server.CreateObject("MyATL.Obj")    <br />
    <br />
    strParam(0) = "We"<br />
    strParam(1) = "love"<br />
    strParam(2) = "COM"    <br />
    <br />
    ret = obj.UseThis(strParam)<br />
    <br />
    Response.Write "Result is : " & ret<br />
    <br />
    Set obj = Nothing

Thank u very very much in advance . Any advice, help and suggestions strongly aprreciated.

Regards.

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

Barry Lapthorn19-Dec-02 20:40

Barry Lapthorn

19-Dec-02 20:40

Din Krop wrote:

SAFEARRAY *pString = StringParam.parray;<br />
BSTR *bstrArray;<br />
CComBSTR bstrRet;<br />
// Lock it down.<br />
SafeArrayAccessData(pString, (void**)&bstrArray);

I did the following when using variants + safearrays:

//  sort out arraybounds as VB can be arr[x..y]<br />
long lowerBounds, upperBounds;<br />
SafeArrayGetLBound( StringParam.parray, 1, &lowerBounds);<br />
SafeArrayGetUBound( StringParam.parray, 1, &upperBounds);<br />
long nArgs = (upperBounds - lowerBounds) + 1;<br />
//  array of variants<br />
CComVariant* pvVariant;<br />
HRESULT hr = SafeArrayAccessData(StringParam.parray, (void**) &pvVariant);<br />
<br />
USES_CONVERSION;<br />
for(int i = 0; i < nArgs; i++)<br />
{<br />
  char szTemp[255];<br />
  if (pvVariant[i].vt == VT_BSTR)<br />
     strcpy(szTemp, OLE2T(pvVariant[i].bstrVal));<br />
  // do stuff<br />
}<br />
hr = SafeArrayUnaccessData(StringParam.parray);<br />
if (pvVariant)<br />
delete pvVariant;<br />

This may help.

Regards

Barry

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

AlexO20-Dec-02 3:33

AlexO

20-Dec-02 3:33

1. The following is wrong on several levels, it will create huge runtime problems. Please do not follow that example.

if (pvVariant)
delete pvVariant;

2. I am not familiar with CComVariant, but the next 2 lines look dangerous as well

CComVariant* pvVariant;
HRESULT hr = SafeArrayAccessData(StringParam.parray, (void**) &pvVariant);

safer approach fould be
VARIANT* pvVariant;

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

Barry Lapthorn20-Dec-02 5:59

Barry Lapthorn

20-Dec-02 5:59

AleXO wrote:
it will create huge runtime problems.

Funny, never had any, boundschecker, + lint never complained either. Why would it cause problems then? Or should you really leave a dangling pointer?

Regards

Barry

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

AlexO20-Dec-02 7:17

AlexO

20-Dec-02 7:17

1. It is not dangling pointer. It is a pointer to the memory allocated by ::SafeArrayCreate.
It should only be deallocated by matching SafeArrayDestroy.
2. This memory most probably allocated through HeapAlloc delete can not be applied here
3. even if #1 and #2 were not true (they are). the object that is allocated is of type VARIANT, not CComVariant.

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

Barry Lapthorn22-Dec-02 0:44

Barry Lapthorn

22-Dec-02 0:44

AlexO wrote:
1. It is not dangling pointer. It is a pointer to the memory allocated by ::SafeArrayCreate.
It should only be deallocated by matching SafeArrayDestroy.
2. This memory most probably allocated through HeapAlloc delete can not be applied here
3. even if #1 and #2 were not true (they are). the object that is allocated is of type VARIANT, not CComVariant.

Looks like you're right about 1+2, but not about 3.

See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_atl_ccomvariant.asp[^]

Regards

Barry

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

Anonymous20-Dec-02 3:42

Anonymous

20-Dec-02 3:42

hi,

Thanx a lot for ur replay. Smile | :)

When use in ASP I got exception error,
in vb I got error :

Method '~' of object '~' failed

regards.

Re: Need help using SafeArray/VARIANT from ASP/VBScript client

AlexO20-Dec-02 4:05

AlexO

20-Dec-02 4:05

even in VB/ASP you need error handling Smile | :)

Executable as server type

jmodia19-Dec-02 3:58

jmodia

19-Dec-02 3:58

Hello everybody:

Does any body has used the .exe server type in .NET?

After doing so I add an ATL Control class and build.

The control works without problems when I show it in Explorer or in Test Container.

Now I insert it into a normal .exe MFC dialog based application and want to add an MFC Class From ActiveX Control for this control, but it is not part of the "available ActiveX control" list.

If I add it from the .exe file and the execute the application the following error appears.

CoCreateInstance of OLE control {7A55CBB2-5043-43F4-894F-CD656330617E} failed.
>>> Result code: 0x800401f9
>>> Is the control is properly registered?
Unhandled exception at 0x7c17f774 (mfc70d.dll) in CallerPrueba2.exe: User breakpoint.

The control is in the register and Test Container and IExplorer don´t complaint about this.

Any helping hint?

Thanks,Jesus.

ATL Server include issue....

nw6031218-Dec-02 18:25

nw60312

18-Dec-02 18:25

Hello,

Here is the problem I have run into. I have an Atl Server Web App that is structured like the following:

\bin (dll's)
\include (common srf that get included)
\secure (srf pages that need to be under SSL, also needs access to inlcudes)
*.srf general srf pages that need access to the includes

Here is the problem, when one of the general srf files uses an include the path for the include internal handler is \bin\something.dll. The path used for the include is relative to the file that included it, not the include itself. Now when one of the secure pages includes the same file the handler path to the dll is wrong, it tries to load the library from ...secure\bin\something.dll. This causes an issue, if the handler paths were relative to the actual file being rendered all would be well. Has anybody run accross this before and have any suggestions? Seems like the alternative is assign SSL access on a file by file basis? Other than this issue ATL server seems like a slick framework!

Thanks for any suggestions!

ATL and GDI+

Jonathan de Halleux18-Dec-02 2:26

Jonathan de Halleux

18-Dec-02 2:26

Did someone already tried to use GDI+ in a ATL DLL ?

I tried to just initialize GDI+ in the InitInstance and deinitialize it in the ExitInstance but seems like registration of the dll fails ???

Jonathan de Halleux.

Re: ATL and GDI+

Jörgen Sigvardsson21-Dec-02 10:21

Jörgen Sigvardsson

21-Dec-02 10:21

If the registration of the dll failed, your code probably crashed in some way. Can't really say what is wrong.. Did you check to see that your input parameters to the gdi+ initialization functions are correct?

--
Only in a world this sh*tty could you even try to say these were innocent people and keep a straight face.

Re: ATL and GDI+

pba_23-Dec-02 12:54

pba_

23-Dec-02 12:54

In docs is stated that you should not call GdiplusStartup or GdiplusShutdown in DllMain or in any function that is called by DllMain ( for solutions look for "GdiplusStartup" in MSDN).

Re: ATL and GDI+

Jonathan de Halleux24-Dec-02 2:58

Jonathan de Halleux

24-Dec-02 2:58

Thanks ! It's working now. I had putted GDI+ initialization in the CWinApp::InitInstance and, in fact, it was called by DllRegister...

Jonathan de Halleux.

Attributed ATL and interfaces

Chad Busche16-Dec-02 6:44

Chad Busche

16-Dec-02 6:44

I have created a couple interfaces that do not have a coclass. The coclass's for these interface exists in different dll's. When I build my project these interfaces do not included into my dll.. I've created a dummy class that implements these interfaces and that works. Is there any other way?

thanks in advance.

Re: Attributed ATL and interfaces

Jörgen Sigvardsson16-Dec-02 10:40

Jörgen Sigvardsson

16-Dec-02 10:40

How about #import "your.dll"?

--
Only in a world this sh*tty could you even try to say these were innocent people and keep a straight face.

Regular methods on the class object

Mehdi Mousavi14-Dec-02 3:48

Mehdi Mousavi

14-Dec-02 3:48

Dear folks,

Consider 2 components, COuter that implements IOuter and CInner that implements IInner. OTOH, CInner is *auto aggregated* within COuter. By auto aggregation I mean it's aggregated within the COuter class using COM_INTERFACE_ENTRY_AUTOAGGREGATE ATL's macro.

Moreover, I've got some regular member methods on CInner, say, SetId, SetOrigin, and the like. These method *are not* on my IInner interface, they are placed as member functions of the class (as mentioned above). The IInner contains "Get" accessors, say, GetId, GetOrigin and the like so that the user could *only* obtain some information using the IInner interface. She cannot set anything on the object, since there's no "Set" accessors on IInner.

Now, I'm going to use the objects mentioned above, so that I can call those Set accessors within the program and the user could successfully get these values using the Get methods on IInner. I tried the following:

IOuterPtr spOuter;
HRESULT hRes = COuter::_CreatorClass::CreateInstance(NULL, IID_IOuter, (void **)&spOuter);
if(FAILED(hRes))
return FALSE;

CComAggObject<cinner> *pInner;
hRes = CComAggObject<cinner>::CreateInstance(spOuter, &pInner);
if(FAILED(hRes))
return FALSE;

pInner->m_contained.SetId(24950);

IInnerPtr spInner;
hRes = pInner->QueryInterface(IID_IInner, (void **)&spInner);
if(FAILED(hRes))
return FALSE;

But this is basically wrong, since the Inner object is *auto aggregated* ! Do you have any idea how I can create such things? Something like ITCallInfoChangeEvent that gives the user some informaiton via it's Get accessors, (get_Call and get_Cause to name a few) and user cannot set anything on this object, since it's got no Set accessor.

Any help would be highly appreciated,

Cheers

Mehdi Mousavi

Re: Regular methods on the class object

AlexO19-Dec-02 4:25

AlexO

19-Dec-02 4:25

How about plain old approach of simple object with two interfaces?

Re: Regular methods on the class object

Mehdi Mousavi19-Dec-02 6:27

Mehdi Mousavi

19-Dec-02 6:27

Well, I finally ended up in having 2 different interface on my inner object, one for initialization and the other one for Get accessors.

Cheers,

Mehdi Mousavi

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