Mental Block - CString to Char

Mental Block - CString to Char

• Peng Song

  You also can call GetBuffer( int ) to get a pointer of the internal buffer of CString.
  
  
  Bye
  Martin
  
  

• Malika Senaratna

  CString Operations Relating to C-Style Strings
  Converting to C-Style Null-Terminated Strings
  http://msdn.microsoft.com/library/default.asp url=/library/en-us/vccore98/HTML/_core_strings.3a_.cstring_operations_relating_to_c.2d.style_strings.asp
  
  This is the published microsoft example:
  CString theString( "This is a test" );
  LPTSTR lpsz = new TCHAR[theString.GetLength()+1];
  _tcscpy(lpsz, theString);
  //... modify lpsz as much as you want
  
  I would have done it like this:
  
  // #define _UNICODE
  
  #include <afx.h>
  #include <stdio.h>
  #include <tchar.h>
  
  void main( )
  {
     // CString theString("This is a test" );  // converts to UNICODE string internally
     // CString theString(L"This is a test" );  // stores a UNICODE string literal
     CString theString(_T( "This is a test") );  // passes literal string based on UNICODE flag
  
     // LPTSTR lpsz = new TCHAR[theString.GetLength()+1];  // optional way 
     // LPTSTR lpsz = new _TCHAR[theString.GetLength()+1];  // optional way 
     // _TCHAR *mytchar = new _TCHAR[theString.GetLength()+1]; // optional way
     TCHAR *mytchar = new TCHAR[theString.GetLength()+1];
  
     _tcscpy(mytchar, theString);
     _tprintf("mytchar=%s", mytchar);
  }
  
  If you want a char * to a string regardless of whether UNICODE is defined, use the following:
  
  #include <afx.h>
  #include <stdio.h>
  #include <winnt.h> // windows type definitions
  #include <tchar.h>
  
  void main( )
  {
     CString theString("This is a test" );  // converts to UNICODE string internally
     char *mychar = new char[theString.GetLength()+1];
     // strcpy(mychar, (const char *)theString); // class way
     strcpy(mychar, (LPSTR)theString); // windows specific type cast
     printf("mytchar=%s", mychar);
  }
  
  If UNICODE is defined the following might have a problem with this approach:
  
  #include <afx.h>
  #include <stdio.h>
  void main()
  {
   CString theString( "This is a test" );
   char* mychar = new char[theString.GetLength()+1];
   _tcscpy(mychar, theString);
   printf ("mychar= %s",mychar);
  }
  
  _tcscpy(_TCHAR *, const TCHAR *)
  This would attempt to push a UNICODE string into a variable that is not supported for UNICODE.  Memory space not large enough to hold the string.
  
  James Sigler
  Dallas, TX
  
  
  

  
  

• JimDuncan

  thanks...
  
  I guess I just needed a break and a pointer :)
  
  

• smartwebagent

  Hi Horus_Kol,
    Here is a link that includes a sample as well of how to convert from CString to char:
  
  http://msdn.microsoft.com/library/default.asp url=/library/en-us/vccore/html/_core_Strings3a_CString_Operations_Relating_to_C2dStyle_Strings.asp
  
  The link lists a sample similar to doing something like:
  
  #include <afx.h>
  #include <stdio.h>
  void main()
  {
   CString theString( "This is a test" );
   char* mychar = new char[theString.GetLength()+1];
   _tcscpy(mychar, theString);
   printf ("mychar= %s",mychar);
  }
  
  Hope this helps!
  
  Thanks,
    Ayman Shoukry
    VC++ Team

  
  
  
• Mental Block - CString to Char