Managed C++/CLI

Re: Error 206 error C2665: 'qsort' : none of the 2 overloads could convert all the argument types

16-May-07 5:55

Hi,

I have a function for comaring.

int DataPeakCompareFunc(const void *el1, const void *el2)
{
const DataPeak *peak1 = reinterpret_cast<const datapeak="" *="">(el1);
const DataPeak *peak2 = reinterpret_cast<const datapeak="" *="">(el2);

if (peak1->position < peak2->position)
{
return -1;
}
else if (peak2->position < peak1->position)
{
return 1;
}
return 0;
}

this is my qsort function

int (FConvert::OConvevw::*pt2Function) (const void*, const void*) = NULL;
pt2Function = &FConvert::OConvevw::DataPeakCompareFunc;
qsort((void*)pScan, num_readings, sizeof(DataPeak),pt2Function);

But i am getting this error

Error 206 error C2665: 'qsort' : none of the 2 overloads could convert all the argument types d:\cougar_io_development\cougar\core\libraries\cplusplus\dlls\fconvert\OConvevw.h 789

both are residing in oconvevw.h file only.

What to do?

Thanks in advance.

Regards, Eswari

subramanyeswari16-May-07 6:02

Re: Error 206 error C2665: 'qsort' : none of the 2 overloads could convert all the argument types

16-May-07 6:02

may be this is the wrong forum to ask.. But i could not see any C++ category.

That's why i posted here

Mark Salsbery16-May-07 6:33

16-May-07 6:33

Yes, this is the wrong forum. See your post here[^] on the correct forum Smile | :)

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

lnk2028 unresolved token

subramanyeswari16-May-07 2:16

Re: lnk2028 unresolved token

16-May-07 2:16

I am using /clr compiler flag. I am getting these errors while compiling my code.

1.
Error 1 error LNK2028: unresolved token (0A00098C) "int __cdecl GetXcaliburDataPath(class ATL::CStringT<wchar_t,class strtraitmfc_dll<wchar_t,class="" atl::chtraitscrt<wchar_t=""> > > &)" (?GetXcaliburDataPath@@$$FYAHAAV?$CStringT@_WV?$StrTraitMFC_DLL@_WV?$ChTraitsCRT@_W@ATL@@@@@ATL@@@Z) referenced in function "public: __clrcall FConvert::FConvertClass::FConvertClass(struct FConvert::FConvertRecord ^)" (??0FConvertClass@FConvert@@$$FQ$AAM@P$AAUFConvertRecord@1@@Z) FConvert.obj
2.Error 2 error LNK2019: unresolved external symbol "int __cdecl GetXcaliburDataPath(class ATL::CStringT<wchar_t,class strtraitmfc_dll<wchar_t,class="" atl::chtraitscrt<wchar_t=""> > > &)" (?GetXcaliburDataPath@@$$FYAHAAV?$CStringT@_WV?$StrTraitMFC_DLL@_WV?$ChTraitsCRT@_W@ATL@@@@@ATL@@@Z) referenced in function "public: __clrcall FConvert::FConvertClass::FConvertClass(struct FConvert::FConvertRecord ^)" (??0FConvertClass@FConvert@@$$FQ$AAM@P$AAUFConvertRecord@1@@Z) FConvert.obj
Any help is appreciated.

Thanks, Eswari

Mark Salsbery16-May-07 5:48

Re: lnk2028 unresolved token

16-May-07 5:48

These are linker (not compiler) errors. In your project, ou need to include the file which
contains the implementation of GetXcaliburDataPath(). If it's in an external DLL you need to add
the link library (.lib) file. If it's in one of your source files (.cpp) then make sure that
file is in your project and the linker can find the .obj file for it.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

subramanyeswari16-May-07 5:51

interface and main in vc++2005...help please

16-May-07 5:51

I figured it out. Thanks anyway.
Regards, Eswari

Logging

hansipet16-May-07 0:06

hansipet

16-May-07 0:06

Hello,

at the moment I'm searching some logging possibility that I can use in .net and in native c++. For pure .net implementation I have used until now the Enterprise logging application block. But for the native c++ application I don't cant use this, because in this parts I really need a fast solution.

Does anyone now a solution that works in booth managed and unmanaged parts and is also fast?

Best regards
Hansjörg

Re: Logging

sthotakura21-May-07 21:24

sthotakura

21-May-07 21:24

Develop a simple WIN32 dll - Use it from both unmanaged and managed worlds.

Cheers,
Suresh

lavy288315-May-07 22:14

Re: interface and main in vc++2005...help please

15-May-07 22:14

Helo...I have my inteface in c++ and I want to take the data from the interface in the main program like this:

int main(array ^args)
{
// Enabling Windows XP visual effects before any controls are created
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
// Create the main window and run it
Application::Run(gcnew Form1());
int container = Convert::ToInt32(forminterface::Form1::ContainerWidthtextBox::...., System::Globalization::CultureInfo::CurrentCulture);.........}

in the interface I have a TextBox...ContainerWidthtextBox in which I introduce the data ...how can I use this value in my main ....because it doesn't let me to use:

int container = Convert::ToInt32(forminterface::Form1::ContainerWidthtextBox->Text, System::Globalization::CultureInfo::CurrentCulture);

it give me an error like Error 5 error C2227: left of '->Text' must point to class/struct/union/generic type please help me.......

lavi

lavy288315-May-07 22:41

Re: interface and main in vc++2005...help please [modified]

15-May-07 22:41

Please help me...how can I get a value in main from my interface....it's a method?...I am disperate..I must solve this...

prasad_som15-May-07 23:20

prasad_som

15-May-07 23:20

Following snippet should give you some idea about usage.

TestForm::Form1^ myform = gcnew Form1(); 
Application::Run(myform);
MessageBox::Show(myform->textBox1->Text);

-- modified at 5:25 Wednesday 16th May, 2007
Probably, you need better alternative. But, you was facing problem, because, of using object in wrong way, infact, I guess, edit box variable was not recognized by compiler.

Prasad
MS MVP - VC++

Re: interface and main in vc++2005...help please

Mark Salsbery16-May-07 5:53

Re: interface and main in vc++2005...help please

16-May-07 5:53

It seems to me Prasad had it right...you need an actual object to access its "Text" property:

Form1^pForm1 = gcnew Form1()
Application::Run(pForm1);
int container = Convert::ToInt32(pForm1->Text, ...);

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

lavy288316-May-07 5:58

what is the difference in this?

16-May-07 5:58

thanks .....I solved the problem

syedhasan15-May-07 18:32

syedhasan

15-May-07 18:32

when we use __value class clr provides an hierarchy of one __gc * and others __nogc *, and when we use __gc class clr provides an hierarchy of two __gc * and others __nogc*, what is the difference or advantage from this?

Confused | :confused:

Thanks,

Syed

TIMESTAMP_STRUCT from MFC to forms

earlgraham15-May-07 10:02

earlgraham

15-May-07 10:02

I’m converting an old MFC program to Windows Forms. In one function there is a TIMESTAMP_STRUCT type. That is defince in an MFC library function (afxdb.h).

I can’t find a replacement for this library. Any leads to locating a way to replace this would be very helpful.
Thanks

Programmer
Glenn Earl Graham
Austin, TX

Re: TIMESTAMP_STRUCT from MFC to forms

Mark Salsbery15-May-07 13:44

Re: TIMESTAMP_STRUCT from MFC to forms

15-May-07 13:44

TIMESTAMP_STRUCT is an ODBC type defined in sqltypes.h.

It looks pretty similar to a Windows SYSTEMTIME structure or a .NET System.DateTime struct.

Are you looking for a database class/framework replacement or just for the time struct?

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

earlgraham16-May-07 5:31

earlgraham

16-May-07 5:31

I think this will work. Thanks

Programmer
Glenn Earl Graham
Austin, TX

pointers and structures

klutez12315-May-07 2:49

klutez123

15-May-07 2:49

Right now I'm creating a program that declares a structure, which also has enum inside it. Now I believe I declare the structure right, but the next step is to create a loop that has the user enter 5 different items of data for library information. But I have to use pointers, so when the loop runs and I enter the information, the data has to be sent to a structure variable only once all six attributes are entered, and the pointer values should be used to create the structure.

I was given an example:

cin >> a;
cin >> b;
library.dewey = &aptr;

This is my code so far:

struct card_catalogue<br />
	{ <br />
		float dewey;<br />
		string title;<br />
		string author;<br />
		int released;<br />
	        int num_pages;<br />
		enum type {fiction = 1, non-fiction, reference, pond};<br />
    };<br />
<br />
int main()<br />
{<br />
return 0;<br />
}<br />

Re: pointers and structures

led mike15-May-07 6:15

led mike

15-May-07 6:15

Why would you post this question in the C++/CLI forum? I would think being able to 'read' would be a prerequisite for whatever course this assignment is from. WTF | :WTF:

led mike

output to console in Vc++2005

lavy288315-May-07 1:55

Re: output to console in Vc++2005

15-May-07 1:55

Hello... I have a function which takes my data from "Contload.xml"...and put it in the variable "Wc", how can I use this variable in the main program ...so that it be able to see it in the console.....

void readfromfile(String^ strFName,int Wc)
{
strFName = gcnew String("e:\\Contload.xml");
DataSet^ dataset = gcnew DataSet();
dataset->ReadXml(strFName);
DataRowCollection^ rows;
int Wc,Hc, Dc,idi,ix;
int id[100];
int w[100];

rows = dataset->Tables[0]->Rows;
for each (DataRow^ row in rows)
{
Wc = Convert::ToInt32(row["ContainerWidth"], System::Globalization::CultureInfo::CurrentCulture);
}
how can I cal this "Wc" in the main ...?

int main(int argc, char *argv[])
{
String^ filename = gcnew String("e:\\Contload.xml");
readfromfile(filename);
Console::WriteLine("Width: {0}",Wc);b>

lavy

Mark Salsbery15-May-07 5:55

Re: output to console in Vc++2005

15-May-07 5:55

Maybe

Console::WriteLine("Width: {0}", Wc.ToString());

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

StevenS_Dev21-May-07 4:10

StevenS_Dev

21-May-07 4:10

If you want both readfromfile and Main to know about the variable Wc, then one option is to use what is called 'file scope'. If you define 'Wc' in file scope, then the variable becomes global for this ONE file. You simply define 'int Wc;', or perhaps 'static int Wc;' at the top of your file. Now you can use Wc anywhere in this file.

The current code will only print out the last result of Wc. Is that what you want? If you want to print Wc for each loop, you will need the WriteLine inside the for loop.

Re: output to console in Vc++2005

lavy288321-May-07 4:12

21-May-07 4:12

thanks...I've done it...

missing ; before *

subramanyeswari14-May-07 22:48