Re: CStringArray

"Giovanni Dicanio" <>
Thu, 15 Nov 2007 23:19:09 +0100
You may want to try code like this, defining an helper class called

IONameManager ioNames;

// mod = 0, location = 0
ioNames.InsertName( 0, 0, _T("Test") );

// mod = 2, location = 3
ioNames.InsertName( 2, 3, _T("Ciao") );

// Print content of the class
MessageBox( NULL, ioNames.ToString(), _T("IONameManager"), MB_OK);

The class implementation is like this (it may have bugs, but seems to

BTW: I'm not sure I understood your specifications correctly...


// ---------------------------------------------------------------------
// Stores a 2D array of strings, indexed by "ModNum" and "Location".
// Use InsertName() to insert/modify a name in the given position.
// Use GetName() to retrieve the name in given position
// (returns an empty string if no name is inserted there).
// ---------------------------------------------------------------------
class IONameManager

    enum { ModNumMax = 16 }; // modNum in 0-16
    enum { LocationMax = 12 }; // location in 0-12

    // Build the object
        // Build array of proper size
        : m_names( (ModNumMax+1) * (LocationMax+1) )

    // The class methods check for valid position indexes.
    // On bad indexes, they ASSERT in debug builds, and
    // throw exceptions in release builds.

    // Insert/modify string in given position
    void InsertName( int modNum, int location, const CString & name )
        ATLASSERT( ValidIndexes( modNum, location ) );
        if ( ! ValidIndexes(modNum, location ) )
            throw std::out_of_range( "Bad addressing." ); GetIndex(modNum, location) ) = name;

    // Get string in given position
    CString GetName( int modNum, int location ) const
        ATLASSERT( ValidIndexes( modNum, location ) );
        if ( ! ValidIndexes(modNum, location ) )
            throw std::out_of_range( "Bad addressing." );

        return GetIndex(modNum, location) );

    // Return string representation of the class,
    // for debugging purpose
    CString ToString() const
        CString result;

        for ( int mod = 0; mod <= ModNumMax; mod++ )
            for ( int loc = 0; loc <= LocationMax; loc++ )
                result.Append( _T("[") );
                result.Append( GetName(mod, loc) );
                result.Append( _T("] ") );
            result.Append( _T("\n") );

        return result;


    typedef std::vector< CString > StringArray;
    StringArray m_names;

    // Do the given indexes specify a valid position?
    bool ValidIndexes( int modNum, int location ) const
        bool valid = false;

        if ( modNum >= 0 && modNum <= ModNumMax )
            if ( location >= 0 && location <= LocationMax )
                valid = true;

        return valid;

    // Convert 2D indexes into 1D, to properly access the 1D array
    int GetIndex( int modNum, int location ) const
        return ( location + modNum * (LocationMax+1) );



"Hoop" <> ha scritto nel messaggio

I am doing some maintenance work on an MFC app.
The portion of code I have to deal with uses a number CStringArrays.
I am not that familier with these and have had limited success.
Code wise an array is created,
CStringArray ioNames[64];

Data is added,
void AddIOName(int modNum, CString name)
and accessed,
CString GetIOName(int modNum, int num)
 return ioNames[modNum][num];

From what I have learned so far I have to make use of either
InsertAt() or SetAt(),

void InsertIOName(int modNum, int location, CString name)
// ioNames[modNum].InsertAt( location, name);
   ioNames[modNum].SetAt(location, name);

I am wondering if anybody knows where there is some good code examples
for this. I have been looking
over the info at MSDN, no much in the way of examples.

What I would like is the proper way to initialze the arrays, not sure
if the original code is correct.
And if I use InsertAt() and SetAt(), would the GetIOName() above work?
I do not think so.

Thanks For any help or feedback.

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