CFileProperty - Class Used To Read File Properties, Such as ID3 Tag and so on

• Download demo and sample - 168.62 KB 
• Download source code - 70.19 KB 

Introduction

CFileProperty exposes simple methods to read the file properties, i.e. MP3 ID3 tags and so on.

Using the Code

Copy FileProperty.h and FileProperty.cpp into your project.

You may need to append some includes in the stdafx.h:

#include <map>
#include <NTQuery.h>
#include <shlwapi.h>
#include <ShlGuid.h>
#include <shlobj.h>
#include <shobjidl.h>
#pragma comment( lib, "shlwapi.lib") 

The tiny class is very simple to use. Here is the sample code:

CFileProperty oFileProperty;
if( oFileProperty.LoadFromFile(_T("C:\\1.mp3") )
{                                                   
	// Get information for music file               
	tagFilePropMusicInfo stMusicInfo = {0};      
	oFileProperty.GetMusicInformation(stMusicInfo);
	                                                   
	// TO DO: read information stored in stMusicInfo
	// ......                                   

	// Retrieve a specific property
	LPCTSTR lpszTitle = oFileProperty.GetProperty
			( FMTID_SummaryInformation, PIDSI_TITLE);

	// The code below demonstrates how to enumerate all properties,
	// but you'd better get the property by give FMTID and PID 
	std::map<CString, std::map<DWORD, CString> >::iterator iter1;
	iter1 = oFileProperty.m_mpProperties.begin();    
	for( ; iter1 != oFileProperty.m_mpProperties.end(); iter1++)   
	{                                                        
		std::map<DWORD, CString> & mpProperty = iter1->second;
		std::map<DWORD, CString>::iterator iter2;
		iter2 = mpProperty.begin();   
		for( ; iter2 != mpProperty.end(); iter2++)   
		{
			m_strInfo.AppendFormat( _T("\r\n%s %08ld %s")
				, iter1->first
				, iter2->first
				, iter2->second.IsEmpty() ? 
						_T("<NULL>") : iter2->second
				);
		}
	}
} 

FMTID

A property set is identified with a format identifier (FMTID). Listed below are some FMTIDs for your reference.

History

• 8^th March, 2009: Initial post

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)