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Sorry I do not intend on doing your work, and I don't expect any one else will either;
this forum is for helping people with a specific question or problem.
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hello,
I would have a question about the C++ defined types to be available in .NET applications.
We have some implementation in C++, and we have been defining some classes that use templates and do some smart things. Now we have a need to be able to use those classes in C# for example, probably using an intermediate C++ CLI class-library.
The problem is how to make available those classes without to write for each class in native C++ an analog class in the C++ CLI module ? The CLI module will only include the native C++ code.
ex of what I'm looking to achieve:
C++, file "myclass.h"
class MyClass{};
class MyPipe
{
......void SendObject( MyClass& myClass );
}
C++ CLI
#include "myclass.h"
namespace BridgeClassLibrary {
....class PipeWrpper {
..........void SendObject( MyClass& myClass ){
...............MyPipe pyPipe( "super-pipe" );
...............pipe.SendObject( myClass );
..........}
....}
}
C#
using BridgeClassLibrary ;
namespace Logics.Test {
.....class PipeTester {
........static void Main( string[] args ) {
............MyClass myClass;
............PipeWrpper pipeWrpper;
............pipeWrpper.SendObject( myClass );
........}
.....}
}
modified on Friday, December 07, 2007 11:31:20 AM
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In order for native C++ classes to be visible to a C# application, they have to be wrapped by C++/CLI. In C++/CLI assemblies, native C++ classes have private access. Thus, C# applications can not see them. Also, CLR is not aware of C++ Templates. However, they can be wrapped and used without any problems. Furthermore, with the help of Generics and Interfaces, you can facilitate the wrapping of your Template classes.
"We make a living by what we get, we make a life by what we give." --Winston Churchill
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ok, antoher idea
mm...
ho to import C++ classes into C# from a DLL written in C++.
If it helps the header and the .lib file will be available.
thanks
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carabutnicolae1234 wrote: ho to import C++ classes into C# from a DLL written in C++.
If it helps the header and the .lib file will be available.
No, as George already told you, you can't do that. To use a native C++ library in managed code create a C++/CLI class library where you wrap the native C++ classes in managed classes. Then C# code can access them by using the managed classes.
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Hi, I am coding a Flash Video .flv player. It seems the sound of swf/flv file can not be turned off if the author of that swf/flv file doesn't provide a built-in sound controller inside the file.
Is there anyway around this?
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Hi all,
First of all I am not exactly sure whether I can post this problem in this forum. If its wrong I am sorry for that. I am delibrately need a solution to this problem.
I am trying to create an executable, but when the .pc file converting to .c file I am getting lots of warning message like
<quote>
warning: old-style declaration or incorrect type for: main
warning: implicit function declaration:
warning: no explicit type given
of these 3 lines.
Any idea why I am getting these lines?
Any configuration issues?
What exactly needs to be done to solve these warning messages?
I am trying to compile this is new environment.
Any kind of suggestion would be helpful.
Thanks in advance
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can u send me the makefile.
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<br />
# Executables built by this makefile<br />
PROC=$(ORACLE_HOME)/bin/proc<br />
all: sample<br />
<br />
# Oracle environment setup<br />
include $(ORACLE_HOME)/rdbms/lib/env_rdbms.mk<br />
<br />
# Debug & Development Compiler Flags are below<br />
CFLAGS=-g -DSOCKSELECT -DSUN_SRC_COMPAT -I$(ORACLE_HOME)/rdbms/demo <br />
<br />
# Final Production Compiler Flags are below<br />
CFLAGS=-O -DSOCKSELECT -DSUN_SRC_COMPAT -I$(ORACLE_HOME)/rdbms/demo <br />
<br />
# Link Editor Flags are below (shouldn't need to change anything here)<br />
LDFLAGS=-L$(LIBHOME) -L$(ORACLE_HOME)/rdbms/lib -lsocket -lnsl<br />
<br />
ECHO=$(ORACLE_HOME)/bin/echodo<br />
LLIBPSO=`cat $(ORACLE_HOME)/rdbms/lib/psoliblist`<br />
<br />
FC=f77<br />
COB=cob<br />
COBFLAGS=-C IBMCOMP -x<br />
COBGNTFLAGS=-C IBMCOMP -u<br />
CPLPL=CC<br />
<br />
LLAIO=<br />
<br />
# directory that contain oratypes.h and other oci demo program header files<br />
INCORASTUFF= -I$(ORACLE_HOME)/rdbms/demo -I$(ORACLE_HOME)/rdbms/public -I.<br />
INCLUDE= $(INCORASTUFF) -I<br />
<br />
#<br />
CONFIG = $(ORACLE_HOME)/rdbms/lib/config.o<br />
<br />
# module to be used for linking with non-deferred option<br />
NDFOPT= $(ORACLE_HOME)/rdbms/lib/kpundf.o<br />
<br />
# flag for linking with non-deferred option (default is deferred mode)<br />
NONDEFER=false<br />
<br />
# libraries for linking oci programs<br />
OCILDLIBS=-lclntsh # $(LIBCLIENT) $(DEVTTLIBS) $(LLIBCORE)<br />
<br />
<br />
# object for linking oci programs in Fortran<br />
OCIFOR=$(ORACLE_HOME)/rdbms/lib/ocifor.o<br />
<br />
# object for linking oci programs in Cobol<br />
OCICOB=$(ORACLE_HOME)/rdbms/lib/ocicob.o<br />
<br />
PSOLIBLIST=$(ORACLE_HOME)/rdbms/lib/psoliblist<br />
CLEANPSO=rm -f $(PSOLIBLIST); $(GENPSOLIB)<br />
PROFLAGS=sqlcheck=semantics userid=/ dbms=v6_char dbms=v7 DEFINE=UNIX DEFINE=SUN_SRC_COMPAT DEFINE=linux<br />
<br />
EXE=sample<br />
OBJS=sample.o sampleora.o sampletcp.o <br />
<br />
# Rule to compile any program (specify EXE= and OBJS= on command line)<br />
build: $(OBJS)<br />
$(ECHO) $(CC) $(LDFLAGS) -o $(EXE) $(OBJS) -L$(LIBHOME) -lclntsh <br />
<br />
# "Shorthand" Rule to compile all the sample program<br />
<br />
samples: $(SAMPLES) <br />
<br />
$(SAMPLES):<br />
$(MAKE) -f $(ORACLE_HOME)/proc/demo/proc.mk OBJS=$@.o EXE=$@ build <br />
<br />
# Suffix rules<br />
.SUFFIXES: .exe .o .c .pc<br />
<br />
.pc.c:<br />
$(PROC) $(PROFLAGS) iname=$*.pc <br />
<br />
.pc.o:<br />
$(PROC) $(PROFLAGS) iname=$*.pc<br />
$(CC) $(CFLAGS) $(SQLPUBLIC) -c $*.c<br />
<br />
.c.o:<br />
$(CC) $(CFLAGS) $(SQLPUBLIC) -c $*.c<br />
<br />
sample.o: sample.h<br />
<br />
sampleora.c: sampleora.pc<br />
$(PROC) iname=$*.pc $(PROFLAGS)<br />
<br />
icim: $(OBJS)<br />
$(CC) $(LDFLAGS) -o $(EXE) $(OBJS) -L$(LIBHOME) -lclntsh<br />
<br />
LIBDIR= $(ORACLE_HOME)/proc/lib<br />
DEMODIR= $(ORACLE_HOME)/proc/demo<br />
<br />
install_files:<br />
-rm -f $(DEMODIR)/proc.mk<br />
-ln $(LIBDIR)/proc.mk $(DEMODIR)/proc.mk<br />
<br />
# Rules to relink the proc executable<br />
install: clean proc<br />
-chmod 755 $(ORACLE_HOME)/bin/proc<br />
-mv proc $(ORACLE_HOME)/bin/proc<br />
-chmod 755 $(ORACLE_HOME)/bin/proc<br />
<br />
clean:<br />
-rm -f proc<br />
<br />
LIBPLSHACK= $(LLIBPLS)<br />
proc:<br />
@$(ECHO) $(CC) $(LDFLAGS) -o proc $(PROCOBJS) $(LLIBPROC20) \<br />
$(LIBCGEN) $(LIBSLAX) $(LIBOSDGEN) $(LIBPCORE) $(LLIBPLS) $(TTLIBS)<br />
<br />
<br />
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Hello, everyone.
I'm hoping this is the right place to post my question. I've been looking around on the net for the last couple of hours and haven't found a solution to my problem. (I did learned some new stuff for use in the future). So this is my situation. I have a program that lets the user create a response test using a movie. When I tried to draw on the movie the activeX controller always pushed its way to the front. So I've created a separate form that floats on top of the main form to draw on. The program also has three threads running, the main thread, a timing thread, and a thread that updates the floating form.
My problem is when I try and send a message to the floating form I trip a NullReferenceException. I've checked both the callback and my class, and both look properly initialized. The floating form is also correctly intialized. I've tried everything I could find, but nothing helps. I've included the method and the callback declaration. The floating form is called 'TestViewer' and the 'HOTSPOT' class is one I've created.
Thanks everyone for your help
(Sorry my code is in C++, but I know most people us C# or VB when programming in .net, and a lot more people frequent this form than the managed C++ one. If needed I can translate it into C#. Feel free to give me an answer in C#. Over the years I've gotten pretty good a translating C# to C++. Thanks.)
delegate System::Void SetDrawActivePanelCallback(HOTSPOT^ hSpot);
private: System::Void SetTestViewDrawActivePanel(HOTSPOT^ hSpot)
{
if(this->TestViewer->InvokeRequired)
{
SetDrawActivePanelCallback^ cb = (gcnew SetDrawActivePanelCallback(this,
&Edit::SetTestViewDrawActivePanel));
try
{
this->Invoke(cb, hSpot);
} // End try
catch(System::NullReferenceException^ e)
{
String^ s = e->ToString();
::MessageBox::Show(s);
} // End catch
} // End if
else
{
System::Windows::Forms::Panel^ panel = hSpot->GetPanel();
this->TestViewer->DrawActivePanel(panel, this->hotspotVisible);
} // End else
} // End SetTestViewDrawActivelPanel
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This may not be your problem but shouldn't:
Member 3848269 wrote: SetDrawActivePanelCallback^ cb = (gcnew SetDrawActivePanelCallback(this,
&Edit::SetTestViewDrawActivePanel));
be coded with a "+=" rather than a "="!
"We make a living by what we get, we make a life by what we give." --Winston Churchill
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In the following example 1 I added rows to the DataSet
And I did not have any problem. However when I tried to add rows to a DataSet with more than one dimension I get the following error message at row 1 “Object reference not set to an instance of an object.”. I am unable to add the word new after equal sign. Does anyone know how to solve this problem.
Example 1
DataRow dr = dsI.EVar.NewRow();
dr["nRecordID"] = x;
dsI.EVar.Rows.Add(dr);
Example 2
DataRow dr = dsMI[x][1].EVar.NewRow();
dr["nRecordID"] = x;
dsMI[x][1].EVar.Rows.Add(dr);
Thanks in advance,
Michael
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Hello, everyone.
I'm hoping this is the right place to post my question. I've been looking around on the net for the last couple of hours and haven't found a solution to my problem. (I did learned some new stuff for use in the future). So this is my situation. I have a program that lets the user create a response test using a movie. When I tried to draw on the movie the activeX controller always pushed its way to the front. So I've created a seperate form that floats on top of the main form to draw on. The program also has three threads running, the main thread, a timing thread, and a thread that updates the floating form.
My problem is when I try and send a message to the floating form I trip a NullReferenceException. I've checked both the callback and my class, and both look properly initialized. The floating form is also correctly intialized. I've tried everything I could find, but nothing helps. I've included the method and the callback decleration. The floating form is called 'TestViewer' and the 'HOTSPOT' class is one I've created.
Thanks everyone for your help 
delegate System::Void SetDrawActivePanelCallback(HOTSPOT^ hSpot);
private: System::Void SetTestViewDrawActivePanel(HOTSPOT^ hSpot)
{
if(this->TestViewer->InvokeRequired)
{
SetDrawActivePanelCallback^ cb = (gcnew SetDrawActivePanelCallback(this,
&Edit::SetTestViewDrawActivePanel));
try
{
this->Invoke(cb, hSpot);
} // End try
catch(System::NullReferenceException^ e)
{
String^ s = e->ToString();
::MessageBox::Show(s);
} // End catch
} // End if
else
{
System::Windows::Forms::Panel^ panel = hSpot->GetPanel();
this->TestViewer->DrawActivePanel(panel, this->hotspotVisible);
} // End else
} // End SetTestViewDrawActivelPanel
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hi ,
i am trying to copy file in a new file and search a name in newfile , see the code below, but not able to find method, what could be the code in place of ???????.
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
void main()
{
FILE *in, *out;
int i;
char str[100];
clrscr();
in=fopen("B.txt","r+");
if(!in)
{
printf("can not open input file");
exit(0);
}
out=fopen("newB.txt","w");
if(!out)
{
printf("can not open output file");
exit(0);
}
while (!feof(in))
{
fgets(str,100,in);
//for(i=0;str[i]!=null;i++)
fputs(str,out);
fclose(out);
fclose(in);
}
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Turbo C does not support C++/CLI, so you're in the wrong forum. Try the Visual C++ forum
Christian Graus - Microsoft MVP - C++
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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This is a Managed C++ Forum.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
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Hi ,
Can any body help me in using MFC Extension UI dll in .NET Winform
Kamal
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kushu wrote: Can any body help me in using MFC Extension UI dll in .NET Winform
Maybe, but it's not possible unless you can provide specific information so someone can understand what you need.
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Hi Mike,
Thanks for your early response.I am sending you the code for my class that needs to be used in .NET .I need to use this control CSizingControlBar in my Winform. CSizingControlBar is derived from MFC class CControlBar.I am migrating an application from MFC to .NET, there are few controls which require a lot of rewrite effort.Hence we wish to reuse the in .NET.It would be a grest help if you could provide with some feasible solution.
You could see one of my classe below.
Thanks
#ifndef baseCSizingControlBar
#define baseCSizingControlBar CControlBar
#endif
class CSizingControlBar;
typedef CTypedPtrArray <CPtrArray, CSizingControlBar*> CSCBArray;
#include "DsGUIExtClass.h"
class DSGUI_EXT_CLASS CSizingControlBar : public baseCSizingControlBar
{
DECLARE_DYNAMIC(CSizingControlBar);
// Construction
protected:
CSizingControlBar();
public:
virtual BOOL Create(LPCTSTR lpszWindowName, CWnd* pParentWnd,
CSize sizeDefault, BOOL bHasGripper, UINT nID,
DWORD dwStyle = WS_CHILD | WS_VISIBLE | CBRS_TOP);
// Attributes
public:
CSize m_szHorz;
CSize m_szVert;
CSize m_szFloat;
const BOOL IsFloating() const;
const BOOL IsHorzDocked() const;
const BOOL IsVertDocked() const;
const BOOL IsSideTracking() const;
// Operations
public:
virtual void LoadState(LPCTSTR lpszProfileName);
virtual void SaveState(LPCTSTR lpszProfileName);
static void GlobalLoadState(LPCTSTR lpszProfileName);
static void GlobalSaveState(LPCTSTR lpszProfileName);
// Overridables
virtual void OnUpdateCmdUI(CFrameWnd* pTarget, BOOL bDisableIfNoHndler);
// Overrides
public:
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CSizingControlBar)
public:
virtual CSize CalcFixedLayout(BOOL bStretch, BOOL bHorz);
virtual CSize CalcDynamicLayout(int nLength, DWORD dwMode);
virtual BOOL DestroyWindow();
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CSizingControlBar();
protected:
// implementation helpers
UINT GetEdgeHTCode(int nEdge);
BOOL GetEdgeRect(CRect rcWnd, UINT nHitTest, CRect& rcEdge);
virtual void StartTracking(UINT nHitTest);
virtual void StopTracking();
virtual void OnTrackUpdateSize(CPoint& point);
virtual void OnTrackInvertTracker();
virtual void NcPaintGripper(CDC* pDC, CRect rcClient);
virtual void AlignControlBars();
const int FindSizingBar(CControlBar* pBar) const;
void GetRowInfo(int& nFirst, int& nLast, int& nThis);
void GetRowSizingBars(CSCBArray& arrSCBars);
BOOL NegociateSpace(int nLengthAvail, BOOL bHorz);
protected:
static CSCBArray m_arrBars;
DWORD m_dwSCBStyle;
UINT m_htEdge;
CSize m_szMin;
CSize m_szMinT;
CSize m_szMaxT;
CSize m_szOld;
CPoint m_ptOld;
BOOL m_bTracking;
BOOL m_bKeepSize;
BOOL m_bParentSizing;
BOOL m_bDragShowContent;
UINT m_nDockBarID;
int m_cxEdge;
int m_cyGripper;
CSCBButton m_biHide;
// Generated message map functions
protected:
//{{AFX_MSG(CSizingControlBar)
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnNcPaint();
afx_msg void OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS FAR* lpncsp);
afx_msg LRESULT OnNcHitTest(CPoint point);
afx_msg void OnCaptureChanged(CWnd *pWnd);
afx_msg void OnSettingChange(UINT uFlags, LPCTSTR lpszSection);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
afx_msg void OnNcLButtonDown(UINT nHitTest, CPoint point);
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
afx_msg void OnNcLButtonUp(UINT nHitTest, CPoint point);
afx_msg void OnWindowPosChanging(WINDOWPOS FAR* lpwndpos);
afx_msg void OnPaint();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
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How to Convert Binary File to Hex File Format without using any tool?
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The ToString method will allow you to specify a format. Assuming you're not in the wrong forum and are using .NET
Christian Graus - Microsoft MVP - C++
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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hi ,
i am trying to get the object name, see the code below, but not able to find method, what could be the code in place of ???????.
#include "iostream"
using namespace std;
class A{
public:
int i;
void printObjectname(){
cout << ????????;//<--what could be here, to print the object name as 'objectA'
}
};
int _tmain(int argc, _TCHAR* argv[])
{
A *objectA = new A();
objectA->printObjectname();
return 0;
}
santosh
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Hi,
this can not be done.
new A() is an object, it could have a name.
objectA is not an object, it is a variable, it holds a reference to the
class A object. There could be many more references to the same object, it suffices
to do A* objectB=objectA;, now how would the class A object have to know
the name of all the variables pointing to it, and in particular the one you want??
Suggestion: give your objects a name by providing a Name property and/or a name argument
in their constructor, so new A("aha"); would create a new class A object and
give it the name "aha". Now you can ask that object for its name, and/or you can override
its ToString() method so it identifies itself. Remark: this works independently of the
variable(s) that may refer to that object!
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use PRE tags to preserve formatting when showing multi-line code snippets
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Hello. I have to parse an HTML file and extract data from it. Currently I load it into Excel and then save as a .csv file. Then I load the .csv file and parse that. I now have to get the data directly from a web page into .csv format. Has anyone out there attempted something similar. Thank you.
Tom Paronis
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