PathFileExists用法「建议收藏」

全栈程序员-站长 • 2022年6月30日下午10:46 • 未分类 • 阅读 36

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BOOL PathFileExists(LPCTSTR pszPath);

Determines if a file exists.

—经检测，该函数可以检测文件或目录是否存在！

Remarks

This function tests the validity of the file and path. It works only on the local file system or on a remote drive that has been mounted to a drive letter. It will return FALSE for remote file paths that begin with the UNC names \\server or \\server\share. It will also return FALSE if a mounted remote drive is out of service.

为了使用PathFileExists()，必须包含头文件”shlwapi.h”，范例代码如下：

         #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; 
        
         // Search for the presence of a file with a true result. 
        
         int

         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 << 

         "The 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; 
        
         } 
        
         }