vc文件操作汇总—支持wince

一、判断文件及文件夹是否存在

// 判断文件是否存在
bool isfileexist(const cstring& csfile)
{
    dword dwattrib = getfileattributes(csfile);
    return invalid_file_attributes != dwattrib && 0 == (dwattrib & file_attribute_directory);
}
// 判断文件夹是否存在
bool isdirexist(const cstring & csdir)
{
    dword dwattrib = getfileattributes(csdir);
    return invalid_file_attributes != dwattrib && 0 != (dwattrib & file_attribute_directory);
}
// 判断文件或文件夹是否存在
bool ispathexist(const cstring & cspath)
{
    dword dwattrib = getfileattributes(cspath);
    return invalid_file_attributes != dwattrib;
}

// 判断文件或文件夹是否存在
bool ispathexistex(const cstring & cspath)
{
    win32_file_attribute_data attrs = { 0 };
    return 0 != getfileattributesex(cspath, getfileexinfostandard, &attrs);
}

 

二、创建及删除目录

// 创建目录
bool createfolder(cstring strpath)
{
    security_attributes attrib;
    attrib.binherithandle = false;
    attrib.lpsecuritydescriptor = null;
    attrib.nlength = sizeof(security_attributes);
    return ::createdirectory(strpath, &attrib);
    //return ::createdirectory(strpath,null);
}

// 删除目录及子目录
bool deletedirectory(cstring dirname)
{
    cstring pubpath;
    pubpath = dirname;
    cfilefind tempfind;
    dirname += "\\*.*";
    bool isfinded = (bool)tempfind.findfile(dirname);
    while(isfinded)
    {
        isfinded = (bool)tempfind.findnextfile();
        if(!tempfind.isdots())
        {
            cstring strdirname;
            strdirname += pubpath;
            strdirname += "\\";
            strdirname += tempfind.getfilename();
            if(tempfind.isdirectory())
            {
                deletedirectory(strdirname);
            }
            else
            {
                setfileattributes(strdirname, file_attribute_normal); //去掉文件的系统和隐藏属性
                deletefile(strdirname);
            }
        }
    }
    tempfind.close();
    if(!removedirectory(pubpath))
    {
        return false ;
    }
    return true;
}

 

三、查看指定根目录下目录个数

// 获取目录数
int getdirnum(cstring strpath)
{
    int ndirnum = 0;
    cfilefind tempfind;
    bool bfound; 
    bfound = tempfind.findfile(strpath + _t("\\*.*"));
    while (bfound)
    {
        bfound = tempfind.findnextfile();
        if(!tempfind.isdots()) 
        {
            if(tempfind.isdirectory())　　// 判断是否为文件夹
                ndirnum++;
        }
    }
    tempfind.close();
    return ndirnum;      
}    

 

四、文件记录操作

// 文件末尾写入记录 （以时间为例）
void writerecord(time_t tm, cstring strrecordfilepath)
{
    ctime ctm(tm);
    cstring strtime = ctm.format(_t("%y-%m-%d %h_%m_%s"));

    cstdiofile stdiofile;
    if (stdiofile.open(strrecordfilepath, cfile::modewrite)) 
    {
        stdiofile.seektoend();
        stdiofile.writestring(strtime);
        stdiofile.close();
    }
}

// 读取第一条记录
cstring readrecord(cstring strrecordfilepath)
{
    cstring strfirstrecord = _t("");
    cstdiofile stdiofile;
    if (stdiofile.open(strrecordfilepath, cfile::modereadwrite)) 
    {
        stdiofile.seektobegin();
        stdiofile.readstring(strfirstrecord);
        stdiofile.close();
    }    
    return strfirstrecord;
}

// 删除第一条记录
void deleterecord(cstring strrecordfilepath)
{
    vector<cstring> vecstr;
    cstring strtemp;
    cstdiofile stdiofile;
    if (stdiofile.open(strrecordfilepath, cfile::modenotruncate|cfile::moderead)) 
    {
        stdiofile.readstring(strtemp);
        while (stdiofile.readstring(strtemp))
        {
            vecstr.push_back(strtemp);
        }
        stdiofile.close();

        stdiofile.open(strrecordfilepath, cfile::modecreate|cfile::modewrite);
        for (int i = 0; i < (int)vecstr.size(); i++)
        {
            stdiofile.writestring(vecstr[i]);
        }
        stdiofile.close();
    }
}

 

五、ccefilefind — wince

　　由于wince中不支持cfilefind，在此提供网上查找的ccefilefind类，经过实践证明可用。

//================================头文件===================================
#if !defined _cefilefind_h_
#define _cefilefind_h_
// cefilefind.h : header file
#include <afxwin.h>
/////////////////////////////////////////////////////////////////////////////
// ccefilefind window
class ccefilefind : public cwnd
{
    // construction
public:
    ccefilefind( );
public:
    // operations
    void close();
    virtual bool findnextfile( );
    virtual bool findfile( lpctstr pstrname = null);
public:
    // attributes
    //gets the length of the found file, in bytes.
    dword getlength() const;
    //gets the name, including the extension, of the found file
    cstring getfilename() const;
    //gets the whole path of the found file.
    cstring getfilepath() const;
    //gets the whole path of the found file.
    cstring getroot() const;
    // to get the time the specified file was created
    virtual bool getcreationtime( filetime* pfiletime ) const;
    virtual bool getcreationtime( ctime& reftime ) const;
    //gets the time that the file was last accessed.
    virtual bool getlastaccesstime( ctime& reftime ) const;
    virtual bool getlastaccesstime( filetime* pfiletime ) const;
    //gets the time the file was last changed and saved.
    virtual bool getlastwritetime( filetime* pfiletime ) const;
    virtual bool getlastwritetime( ctime& reftime ) const;
    //indicates the desired file attributes of the file to be found.
    virtual bool matchesmask( dword dwmask ) const;
    //determines if the name of the found file has the name "." or "..",
    //indicating that is actually a directory.
    virtual bool isdots( ) const;
    //determines if the found file is read-only.
    bool isreadonly( ) const;
    //determines if the found file is a directory.
    bool isdirectory( ) const;
    //determines if the found file is compressed.
    bool iscompressed( ) const;
    //determines if the found file is a system file.
    bool issystem( ) const;
    //determines if the found file is hidden.
    bool ishidden( ) const;
    //determines if the found file is temporary.
    bool istemporary( ) const;
    //determines if the found file is normal (in other words, has no other attributes).
    bool isnormal( ) const;
    //determines if the found file is archived.
    bool isarchived( ) const;
    // implementation
public:
    virtual ~ccefilefind();
private:
    lpwin32_find_data m_pfiledata;
    lpwin32_find_data m_pnextdata;
    cstring m_csroot;
    handle m_hfilehandle;
    char m_chdirseparator;
    void assertdonenext() const;
};
#endif // !defined _cefilefind_h_

 

//====================================源文件===============================
// cefilefind.cpp : implementation file
//
#include "stdafx.h"
#include "cefilefind.h"
#ifdef _debug
#define new debug_new
#undef this_file
static char this_file[] = __file__;
#endif
#define delete_pointer(ptr) if( ptr != null ) \
{ \
    delete ptr; \
    ptr = null; \
}
#define dir_seperator '\\'
/////////////////////////////////////////////////////////////////////////////
// ccefilefind
ccefilefind::ccefilefind()
:m_hfilehandle(null), // initialize to null
m_pfiledata(null)
{
}
ccefilefind::~ccefilefind()
{
    close();
}
// operations
bool ccefilefind::findfile(lpctstr pstrname)
{
    //close();
    // if null , wild card search
    if( null == pstrname )
    {
        m_csroot = dir_seperator;
        pstrname = _t("\\*.*");
    }
    else
    {
        m_csroot = pstrname;
        int npos = m_csroot.reversefind( '\\' );
        if( npos == 0 )
            m_csroot = '\\';
        else
            m_csroot = m_csroot.left( npos );
    }
    m_pnextdata = new win32_find_data;
    // search for file
    m_hfilehandle = findfirstfile( pstrname, m_pnextdata );
    if ( m_hfilehandle == invalid_handle_value )
    {
        close();
        return false;
    }
    // file was found
    return true;
}
bool ccefilefind::findnextfile()
{
    assert(m_hfilehandle != null);
    if (m_hfilehandle == null)
        return false;
    if (m_pfiledata == null)
        m_pfiledata = new win32_find_data;
    assertdonenext();
    lpwin32_find_data ptemp = m_pfiledata;
    m_pfiledata = m_pnextdata;
    m_pnextdata = ptemp;
    return ::findnextfile(m_hfilehandle, m_pnextdata);
}
void ccefilefind::close()
{
    delete_pointer( m_pfiledata );
    delete_pointer( m_pnextdata );
    if( m_hfilehandle!= null && m_hfilehandle !=
        invalid_handle_value )
    {
        ::findclose( m_hfilehandle );
        m_hfilehandle = null;
    }
}
bool ccefilefind::matchesmask(dword dwmask) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if ( m_pfiledata != null)
        return (!!(m_pfiledata->dwfileattributes & dwmask) );
    else
        return false;
}
cstring ccefilefind::getroot() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
        return m_csroot;
    else
        return cstring("");
}
bool ccefilefind::getlastaccesstime(filetime* ptimestamp) const
{
    assert(m_hfilehandle != null);
    assert(ptimestamp != null);
    assertdonenext();
    if (m_pfiledata != null && ptimestamp != null)
    {
        *ptimestamp = m_pfiledata -> ftlastaccesstime;
        return true;
    }
    else
        return false;
}
bool ccefilefind::getlastwritetime(filetime* ptimestamp) const
{
    assert(m_hfilehandle != null);
    assert(ptimestamp != null);
    assertdonenext();
    if (m_pfiledata != null && ptimestamp != null)
    {
        *ptimestamp = m_pfiledata -> ftlastwritetime;
        return true;
    }
    else
        return false;
}
bool ccefilefind::getcreationtime(filetime* ptimestamp) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null && ptimestamp != null)
    {
        *ptimestamp = m_pfiledata -> ftcreationtime;
        return true;
    }
    else
        return false;
}
bool ccefilefind::getlastaccesstime(ctime& reftime) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        reftime = ctime( m_pfiledata -> ftlastaccesstime );
        return true;
    }
    else
        return false;
}
bool ccefilefind::getlastwritetime(ctime& reftime) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        reftime = ctime( m_pfiledata -> ftlastwritetime );
        return true;
    }
    else
        return false;
}
bool ccefilefind::getcreationtime(ctime& reftime) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        reftime = ctime( m_pfiledata -> ftcreationtime );
        return true;
    }
    else
        return false;
}
bool ccefilefind::isdots() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    // return true if the file name is "." or ".." and
    // the file is a directory
    bool bresult = false;
    if (m_pfiledata != null && isdirectory())
    {
        lpwin32_find_data pfinddata = m_pfiledata;
        if (pfinddata->cfilename[0] == '.')
        {
            if (pfinddata->cfilename[1] == '\0' ||
                (pfinddata->cfilename[1] == '.' &&
                pfinddata->cfilename[2] == '\0'))
            {
                bresult = true;
            }
        }
    }
    return bresult;
}
bool ccefilefind::isarchived( ) const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes == file_attribute_archive )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::iscompressed() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes ==
            file_attribute_compressed )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::isdirectory() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_directory )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::ishidden() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_hidden )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::isnormal() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_normal )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::isreadonly() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_readonly )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::issystem() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_system )
            return true;
        else
            return false;
    }
    return false;
}
bool ccefilefind::istemporary() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
    {
        if( m_pfiledata -> dwfileattributes & file_attribute_temporary )
            return true;
        else
            return false;
    }
    return false;
}
cstring ccefilefind::getfilepath() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    cstring csresult = m_csroot;
    if (csresult[csresult.getlength()-1] != dir_seperator )
        csresult += dir_seperator;
    csresult += getfilename();
    return csresult;
}
cstring ccefilefind::getfilename() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    cstring ret;
    if (m_pfiledata != null)
        ret = m_pfiledata->cfilename;
    return ret;
}
dword ccefilefind::getlength() const
{
    assert(m_hfilehandle != null);
    assertdonenext();
    if (m_pfiledata != null)
        return m_pfiledata -> nfilesizelow;
    else
        return 0;
}
void ccefilefind::assertdonenext() const
{
    // if you trip the assert in the else side, you've called
    // a get() function without having done at least one
    // findnextfile() call
    if (m_hfilehandle == null)
        assert( m_pfiledata == null && m_pnextdata == null);
    else
        assert( m_pfiledata != null && m_pnextdata != null);
}