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Do you want to use .NET, or are you in the wrong forum ? The NeHe tutorials were excellent when I read them.
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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Hi everyone,
I'm creating a WinForms program with a combination of native and managed code. When I compile the program with /clr:pure it builds and runs without problems. I'd like to use the Boost Filesystem library, but the linker complains about undefined references when /clr:pure is on. Using only /clr, the program builds fine, but when trying to run, an exception gets thrown.
The exception gets triggered by line 1473 of dbgheap.c (part of the VC runtime):
_ASSERTE(_CrtIsValidHeapPointer(pUserData));
NOTE: This only happens when using the /clr switch. It doesn't happen with /clr:pure, for example. Can anyone shed some light on this? I'm using VS.NET 2005 Prof SP1 on WinXP Prof SP2 on x86 platform.
Cheers,
Ralph
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What does the call stack say?
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Nishant Sivakumar wrote: What does the call stack say?
Sorry I wasn't able to respond sooner, but you know how deadlines are. Anyway, I worked around the problem by using the file & directory manipulation classes in the System::IO namespace. I'd still like to investigate this problem further when I find some time though.
Cheers,
Ralph
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Why does the compiler complain about the following array of char* declaration?
<br />
public ref class Form1 : public SWF::Form<br />
{<br />
...<br />
private:<br />
static const char* rfDlls[] = { "rfwin32.dll", "rfi32rpc.ndr", "rfi32smb.ndr", NULL };<br />
...<br />
}<br />
Error Message:
error C4368: cannot define 'rfDlls' as a member of managed 'Configuration1::Form1': mixed types are not supported
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Use something like this :-
static array<const char*>^ rfDlls = { "rfwin32.dll", "rfi32rpc.ndr"};
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Thanks Nish,
PS. Looking forward to reading your book.
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Can any body tell me what is wrong here???
fatal error C1010: unexpected end of file while looking for precompiled header directive
Error executing cl.exe.
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2 things
1 - you asked in the wrong forum
2 - your file doesn't include stdafx.h, but you're using precompiled headers.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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3 - stdafx.h nust be the top most #included header
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toxcct wrote: stdafx.h nust be the top most #included header
Yes, but in stdafx.cpp.
Every newly created project comes with stdafx.cpp and stdafx.h
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bsaksida wrote: Yes, but in stdafx.cpp.
not only ; in every cpp file of the project using stdafx.h as the precompiled header file
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The file name just indicates where to stop pre-compiling - it doesn't HAVE to be called
stdafx.h 
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Hi everyone,
I'm trying to use Jeff Atwood's Encryption class, but replicating a simple example yields lots of errors at compile time. Jeff's class is written in VB.NET, but AFAIK all .NET languages compile down to the same CIL, right? So I should be able to use it.
I've tried to rewrite the following VB.NET code in C++/CLI. Am I doing something wrong?
TIA,
Ralph
VB.NET:
<br />
Dim sym As New Encryption.Symmetric(Encryption.Symmetric.Provider.Rijndael)<br />
Dim key As New Encryption.Data("My Password")<br />
Dim encryptedData As Encryption.Data<br />
encryptedData = sym.Encrypt(New Encryption.Data("Secret Sauce"), key)<br />
Dim base64EncryptedString as String = encryptedData.ToBase64<br />
C++/CLI:
<br />
Encryption::Symmetric^ sym = gcnew Encryption::Symmetric(Encryption::Symmetric::Provider::Rijndael);<br />
Encryption::Data^ key = gcnew Encryption::Data("My Password");<br />
Encryption::Data^ encryptedData = sym->Encrypt(gcnew Encryption::Data("Secret Sauce"), key);<br />
System::String^ base64EncryptedString = encryptedData->ToBase64();<br />
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Ralph A. Moritz wrote: I've tried to rewrite the following VB.NET code in C++/CLI. Am I doing something wrong?
Sounds like a nightmare to me.
Why not just use it out of a dll ? Or use something in the Cryptography namespace ?
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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Christian Graus wrote: Why not just use it out of a dll ?
I've compiled Jeff's code into a DLL assembly, and I'm trying to use the encryption classes from the assembly. The problem is that when I try to create an Encryption::Symmetric object, the compiler says:
error C3673: 'EncryptionClassLibrary::Encryption::Symmetric' : class does not have a copy-constructor
Christian Graus wrote: Or use something in the Cryptography namespace ?
IMO Jeff's Encryption class is a lot simpler to use than the stuff in System::Security::Cryptography. But if I can't figure out how to get it working, I guess I'll have to use the latter.
Cheers,
Ralph
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A copy constructor is one that takes an instance of the object, and copies the values into the class. So, just add one.
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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Christian Graus wrote: A copy constructor is one that takes an instance of the object, and copies the values into the class. So, just add one.
I know what a copy constructor is, but I have no idea how to create one in VB.NET or how to extend a VB.NET class in C++/CLI.
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In VB.NET, a constructor is called new(), I think. I dunno I guess you should google it.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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As far as I know, you cannot create copy constructors in VB.NET. It is possible a GC object may have been created on the stack (You have a missing "^" and "gcnew" somewhere!) when the code was converted from VB.NET.
"We make a living by what we get, we make a life by what we give." --Winston Churchill
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I've given up on using Jeff's encryption library and decided to use the System::Security::Cryptography stuff instead. But just look at how much code is required to encrypt a string. Sheesh!
<br />
System::String^ EncryptString(System::String^ str) <br />
{<br />
System::IO::MemoryStream^ ms = gcnew System::IO::MemoryStream;<br />
SSC::RijndaelManaged^ rm = gcnew SSC::RijndaelManaged;<br />
SSC::CryptoStream^ cs = gcnew SSC::CryptoStream(ms, rm->CreateEncryptor(), SSC::CryptoStreamMode::Write);<br />
System::IO::StreamWriter^ sw = gcnew System::IO::StreamWriter(cs);<br />
sw->Write(str);<br />
<br />
sw->Close();<br />
cs->Close();<br />
ms->Close();<br />
<br />
array<System::Byte>^ buff = ms->ToArray();<br />
<br />
System::Text::UnicodeEncoding^ enc = gcnew System::Text::UnicodeEncoding;<br />
return enc->GetString(buff);<br />
}<br />
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Ralph A. Moritz wrote:
array^ buff = ms->ToArray();
my code got mangled there. The above should read:
array<System::Byte>^ buff = ms->ToArray();
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Sounds like you should write a wrapper class, or at least a wrapper method.
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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I don't have VB.NET installed (untick it out of habit) - but I looked at the VB code and it looks like the constructor's first argument is specified as By Val. Try de-referecing the handle and pass that - it may not work, but worth a try :-
Encryption::Symmetric^ sym = gcnew Encryption::Symmetric(*Encryption::Symmetric::Provider::Rijndael);
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Sorry - scrap what I said. The argument is an enum. 
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