CString join method?

Question

I need to concatenate a list of MFC CString objects into a single CSV string. .NET has String.Join for this task. Is there an established way to do this in MFC/C++?

Answer 1

The + operator is overloaded to allow string concatenation. I'd suggest take a look at the documentation on MSDN:

Basic CString Operations has the following example:

CString s1 = _T("This ");        // Cascading concatenation
s1 += _T("is a ");
CString s2 = _T("test");
CString message = s1 + _T("big ") + s2;  
// Message contains "This is a big test".

If you want the strings to be comma-separated, just add the commas yourself.

Answer 2

Iterate through the list of CString objects invoking the AppendFormat method.

//  Initialize CStringList
CStringList cslist ;
cslist.AddTail( "yaba" ) ;
cslist.AddTail( "daba" ) ;
cslist.AddTail( "doo"  ) ;

//  Join
CString csv ;
for ( POSITION pos = cslist.GetHeadPosition() ; pos != NULL ; )
    csv.AppendFormat( ",%s" , cslist.GetNext( pos ) ) ;
csv.Delete( 0 ) ;  //  remove leading comma