PathFileExists用法－－使用#include <shlwapi.h>

全栈程序员-站长 • 2022年7月12日上午10:46 • 未分类 • 阅读 14

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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; 
         
          } 
         
          }