Re: CStringArray

You may want to try code like this, defining an helper class called
IONameManager:

<code>
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);
</code>

The class implementation is like this (it may have bugs, but seems to
work...):

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

<code>

// ---------------------------------------------------------------------
// 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
{
public:

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


// Build the object
IONameManager()
// 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." );

m_names.at( 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 m_names.at( 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;
}


//
// IMPLEMENATION
//
private:

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) );
}
};

</code>

Giovanni



"Hoop" <jcollett@xxxxxxxxxxxx> ha scritto nel messaggio
news:fa135a0a-44f1-443f-8d21-c115ed582a38@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,
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)
{
ioNames[modNum].Add(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.
Jeff


.

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