MFC 文件及其属性相关操作 （MFC 文件操作 三）

一、 从路径中 提取扩展名

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CString path("C:/ForVcTest/diary.txt");
CString ext = path.Mid(path.ReverseFind('.')+1);
AfxMessageBox(ext);

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CString path("C:/ForVcTest/diary.txt");
CString name = path.Mid(path.ReverseFind('/')+1);
AfxMessageBox(name);

CString path("C:/ForVcTest/diary.txt");
CString name = path.Mid(path.ReverseFind('/')+1);
AfxMessageBox(name);

三、获取文件属性

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DWORD dwAttr = GetFileAttributes("C:/ForVcTest/2.txt");//获取文件的属性

if (dwAttr == FILE_ATTRIBUTE_ARCHIVE){
AfxMessageBox("FILE_ATTRIBUTE_ARCHIVE");
}

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SetFileAttributes("C:/ForVcTest/2.txt",FILE_ATTRIBUTE_READONLY);//|FILE_ATTRIBUTE_HIDDEN

SetFileAttributes("C:/ForVcTest/2.txt",FILE_ATTRIBUTE_READONLY);//|FILE_ATTRIBUTE_HIDDEN

五、获取当前程序所在路径

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//提取文件路径
char appName[_MAX_PATH];
GetModuleFileName(NULL,appName,_MAX_PATH);
CString szPath(appName);
AfxMessageBox(szPath);

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MoveFile("C:/ForVcTest/diary.txt","C:/ForVcTest/newCopy.txt");

MoveFile("C:/ForVcTest/diary.txt","C:/ForVcTest/newCopy.txt");

移动后 源文件被删除，目标文件被创建

七、Path Name Title 的区别

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CFile file("C:/ForVcTest/newCopy.txt",CFile::modeRead);

CString szPath = file.GetFilePath();
CString szName = file.GetFileName();
CString szTitle = file.GetFileTitle();

AfxMessageBox("szPath = "+szPath);
AfxMessageBox("szName = "+szName);
AfxMessageBox("szTitle = "+szTitle);

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bool SplitFile()
{
//文件分割
CFile m_File;
CString m_FileName,m_FileTitle,m_FilePath;
m_FilePath = "C://ForVcTest//newCopy.txt";
char pBuf[40];
if(m_File.Open(m_FilePath,CFile::modeRead | CFile::shareDenyWrite))
{
m_FileName=m_File.GetFileName();
m_FileTitle=m_File.GetFileTitle();
//      DWORD FileLength=m_File.GetLength();

//      DWORD PartLength=FileLength/2+FileLength%2;

int nCount=1;
CString strName;
CFile wrFile;
DWORD ReadBytes;
while(true)
{
ReadBytes=m_File.Read(pBuf,40);   //ReadBytes 实际读取的字节数

strName.Format("C://ForVcTest//%s%d.txt",m_FileTitle,nCount);
wrFile.Open(strName,CFile::modeWrite | CFile::modeCreate);
wrFile.Write(pBuf,ReadBytes);
wrFile.Close();
if(ReadBytes<40) //实际读取的字节数 不足 分配的大小，则说明文件读完了

break;
nCount++;
}
m_File.Close();
}
else{
AfxMessageBox("不能打开文件");
return fasle;
}
return true;
}

bool SplitFile()
{
//文件分割
CFile m_File;
CString m_FileName,m_FileTitle,m_FilePath;
m_FilePath = "C://ForVcTest//newCopy.txt";
char pBuf[40];
if(m_File.Open(m_FilePath,CFile::modeRead | CFile::shareDenyWrite))
{
m_FileName=m_File.GetFileName();
m_FileTitle=m_File.GetFileTitle();
//		DWORD FileLength=m_File.GetLength();
//		DWORD PartLength=FileLength/2+FileLength%2;
int nCount=1;
CString strName;
CFile wrFile;
DWORD ReadBytes;
while(true)
{
ReadBytes=m_File.Read(pBuf,40);   //ReadBytes 实际读取的字节数
strName.Format("C://ForVcTest//%s%d.txt",m_FileTitle,nCount);
wrFile.Open(strName,CFile::modeWrite | CFile::modeCreate);
wrFile.Write(pBuf,ReadBytes);
wrFile.Close();
if(ReadBytes<40) //实际读取的字节数 不足 分配的大小，则说明文件读完了
break;
nCount++;
}
m_File.Close();
}
else{
AfxMessageBox("不能打开文件");
return fasle;
}
return true;
}