Wrapper C++/cli class

Wrapper C++/cli class

• jph42

  Thanks for the help.

  I've changed :

  int WrapperClass::Class1::WriteSerial(int BytesToWrite, array<unsigned int>^ Written, array<char>^ WriteBuff, int WriteTimeout)

  {

  UINT retval;

  pin_ptr<unsigned int>pLen = &Written[0];

  pin_ptr<unsigned char>Writechars = &WriteBuff[0]; // ERROR HERE
  
  retval = m_pCSerPortComm->WritePort(BytesToWrite,pLen,Writechars,WriteTimeout);

  return (int)retval;

  }

  I've only one error :

  Error 1 error C2440: 'initializing' : cannot convert from 'cli::interior_ptr<Type>' to 'cli::pin_ptr<Type>'

  on the line marked above, why

  
  

  
  

• ChasOnline

  When you see UINT* in native code, it's preferred to use an array<unsigned int> in managed code. And for BYTE*, use array<char>. Try again with that.

  steven64 wrote:

  Hi, I want to wrapper a my c++ class using Interop. This class has a method WritePort with defined as : UINT WritePort (UINT BytesToWrite, UINT* pBytesWritten, BYTE* pWriteBuff, UINT WriteTimeout); On my C++/Cli Class I've defined an wrapper method defines as : int WrapperClass::Class1::WriteSerial(int BytesToWrite, int^ pBytesWritten, String^ WriteBuff, int WriteTimeout); The code for this wrapper method is : int WrapperClass::Class1::WriteSerial(int BytesToWrite, int^ pBytesWritten, String^ WriteBuff, int WriteTimeout) { UINT retval; UINT ByteWritten; BYTE *pWriteBuff; unsigned char* uWritechars = (unsigned char*)(Marshal::StringToHGlobalAnsi(WriteBuff)).ToPointer(); pin_ptr<unsigned int>pLen = pBytesWritten; // ERROR retval = m_pCSerPortComm->WritePort(BytesToWrite,pLen,uWritechars,WriteTimeout); Marshal::FreeHGlobal(IntPtr((void*)uWritechars)); return (int)retval; } But the build fail with the error : Error 1 error C2440: 'initializing' : cannot convert from 'System::Int32 ^' to 'cli::pin_ptr<Type>' d:\develop\Projects\test\.net\WrapperClass\WrapperClass\class.cpp 57 Can help me PS: sorry for my bad english.....

  
  
  

• Edgar Au

  Perhaps I have been not clear :

  my problem is convert the unmanaged class param UINT* pBytesWritten to an managed syntax usable on a C# environment.

  I've tried with defining int^ pBytesWritten

  and pin_ptr<unsigned int>pLen = pBytesWritten but doesn't build ...

  Someone can help me

  Thanks.

  
  

• wpfnewbee

  Thank's ,

  I've correct and now is OK,

  thanks awfully !!!!!!

  steve

  
  

• Rob Roberts

  The array is of type char, but your pin_ptr uses unsigned char. They need to match.

  steven64 wrote:

  Thanks for the help. I've changed : int WrapperClass::Class1::WriteSerial(int BytesToWrite, array<unsigned int>^ Written, array<char>^ WriteBuff, int WriteTimeout) { UINT retval; pin_ptr<unsigned int>pLen = &Written[0]; pin_ptr<unsigned char>Writechars = &WriteBuff[0]; // ERROR HERE retval = m_pCSerPortComm->WritePort(BytesToWrite,pLen,Writechars,WriteTimeout); return (int)retval; } I've only one error : Error 1 error C2440: 'initializing' : cannot convert from 'cli::interior_ptr<Type>' to 'cli::pin_ptr<Type>' on the line marked above, why

  
  
  
• Wrapper C++/cli class