如何判定一个文件夹是否存在？？？

[SKJG]

在VC中如何判定文件夹是否存在？？？

文件夹可能是一个普通的文件夹
如C:\Windows
也可能就是根目录
如C:\

[vcforever]

BOOL PathFileExists(
LPCTSTR pszPath
);

[byf2002]

#include <windows.h>
#include <iostream.h>
#include "Shlwapi.h"

void main( void )
{
// Valid file path name (file is there).
char buffer_1[] = "C:\\TEST\\file.txt";
char *lpStr1;
lpStr1 = buffer_1;

// Invalid file path name (file is not there).
char buffer_2[] = "C:\\TEST\\file.doc";
char *lpStr2;
lpStr2 = buffer_2;


// Return value from "PathFileExists".
intretval;

// Search for the presence of a file with a true result.
retval = PathFileExists(lpStr1);
if(retval == 1)
{
cout << "Search for the file path of : " << lpStr1 << endl;
cout << "The file requested \"" << lpStr1 << "\" is a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}

else{
cout << "\nThe file requested " << lpStr1 << " is not a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}

// Search for the presence of a file with a false result.
retval = PathFileExists(lpStr2);
if(retval == 1)
{
cout << "\nThe file requested " << lpStr2 << "is a valid file" << endl;
cout << "Search for the file path of : " << lpStr2 << endl;
cout << "The return from function is : " << retval << endl;
}

else{
cout << "\nThe file requested \"" << lpStr2 << "\" is not a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}
}
OUTPUT
==============
Search for the file path of : C:\TEST\file.txt
The file requested "C:\TEST\file.txt" is a valid file
The return from function is : 1

The file requested "C:\TEST\file.doc" is not a valid file
The return from function is : 0

[byf2002]

文件夹和文件的判断方法是一样的.

[wkgenius]

CString strDir = m_strRootDir + _T("\\");
DWORD dwFileAttr = GetFileAttributes(strDir);
if( dwFileAttr == INVALID_FILE_ATTRIBUTES
|| (dwFileAttr & FILE_ATTRIBUTE_DIRECTORY) == 0)
{
if( !CreateDirectory(strDir,NULL) )
{
MessageBox(_T("不能创建目录"));
return;
}
}

上面的代码首先判断目录是否存在，如果不存在，则创建目录

[eejeff]

up

[dzqsuper]

FileExists

[yy315]

查找文件夹
WIN32_FIND_DATA fdData;
HANDLE hFind=::FindFirstFile(strSrcFile,&fdData);

//如果源文件（包括文件夹)不存在，创建文件
if (hFind == INVALID_HANDLE_VALUE)
{
::CreateDirectory(strFileName,NULL);
}
::FindClose(hFind);

[薛定谔之死猫]

学习

[ygang76]

GetFileAttributes

[lsp5i5j]

学习!

[uoyevoli]

有没有人试试
PathIsDirectory
？？

[一条晚起的虫]

MSDN:

Verifies that a path is a valid directory.

BOOL PathIsDirectory(
LPCTSTR pszPath
);

Parameters
pszPath
[in] Pointer to a null-terminated string of maximum length MAX_PATH that contains the path to verify.
Return Values
Returns TRUE if the path is a valid directory, or FALSE otherwise.

[thundenet]

用BOOL PathFileExists(
LPCTSTR pszPath
);是最简单不过了

[xwqboy]

如判断c盘"xwq"文件夹是否存在

if (!PathIsDirectory("C:\\xwq"))
{
AfxMessageBox("请先建立'xwq'文件夹!");
return;
}

要包含如下头文件
#include "shlwapi.h"
并在project\setting
的link中导入shlwapi.lib

[jacking007]

INVALID_FILE_ATTRIBUTES
这个没有阿，我搜索msdn也没搜索到，程序报错说这个未定义。

[大雨仔]

int CDeleteWrongInfoDlg::IsDirectoryOrFile(CString strFileName)
{
strFileName.TrimLeft();
strFileName.TrimRight();

WIN32_FIND_DATA fd;
HANDLE hFind = ::FindFirstFile(strFileName,&fd);
::FindClose(hFind);

//不存在同名的文件或文件夹
if (hFind == INVALID_HANDLE_VALUE)
{
return 0 ;
}
//判断是否为目录
else if (fd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)
{
return 2 ;
}
else
{
return 1;
}
}

[Mr-Chen]

CFileFind file;
BOOL bContinue = file.FindFile(strText);
while(bContinue)
{
bContinue = file.FindNextFile();
if(！file.IsDirectory())
AfxMessageBox("文件夹不存在");
}

[csdn_cht]

PathFileExists


BOOL PathFileExists(
LPCTSTR lpszPath
);

Determines if a file exists.

Returns TRUE if the file exists, or FALSE otherwise.
lpszPath
Address of the file to verify.
This function will test for the validity of the file and path.

Example:

#include <windows.h>
#include <iostream.h>
#include "Shlwapi.h"

void main( void )
{
// Valid file path name (file is there).
char buffer_1[] = "C:\\TEST\\file.txt";
char *lpStr1;
lpStr1 = buffer_1;

// Invalid file path name (file is not there).
char buffer_2[] = "C:\\TEST\\file.doc";
char *lpStr2;
lpStr2 = buffer_2;


// Return value from "PathFileExists".
int retval;

// Search for the presence of a file with a true result.
retval = PathFileExists(lpStr1);
if(retval == 1)
{
cout << "Search for the file path of : " << lpStr1 << endl;
cout << "The file requested \"" << lpStr1 << "\" is a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}

else{
cout << "\nThe file requested " << lpStr1 << " is not a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}

// Search for the presence of a file with a false result.
retval = PathFileExists(lpStr2);
if(retval == 1)
{
cout << "\nThe file requested " << lpStr2 << "is a valid file" << endl;
cout << "Search for the file path of : " << lpStr2 << endl;
cout << "The return from function is : " << retval << endl;
}

else{
cout << "\nThe file requested \"" << lpStr2 << "\" is not a valid file" << endl;
cout << "The return from function is : " << retval << endl;
}
}
OUTPUT
==============
Search for the file path of : C:\TEST\file.txt
The file requested "C:\TEST\file.txt" is a valid file
The return from function is : 1

The file requested "C:\TEST\file.doc" is not a valid file
The return from function is : 0

[zhangy211]

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