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What is the usage of PathFileExists

Oct 09, 2023 pm 02:10 PM
pathfileexists

PathFileExists用法:1、需要包含头文件“#include ”;2、调用“PathFileExistsA”或“PathFileExistsW”函数,传入要检查的文件或目录的路径作为参数;3、根据返回值判断文件或目录是否存在。

What is the usage of PathFileExists

PathFileExists函数是一个Windows API函数,用于检查指定路径下是否存在指定文件或目录。

函数原型如下:

BOOL PathFileExistsA(
  LPCSTR pszPath
);
BOOL PathFileExistsW(
  LPCWSTR pszPath
);
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参数说明:

pszPath:要检查的文件或目录的路径,可以是相对路径或绝对路径。对于Unicode版本,参数类型为LPCWSTR;对于ANSI版本,参数类型为LPCSTR。

返回值:

如果文件或目录存在,则返回TRUE。

如果文件或目录不存在,则返回FALSE。

使用方法:

首先,需要包含头文件#include

调用PathFileExistsA或PathFileExistsW函数,传入要检查的文件或目录的路径作为参数。

根据返回值判断文件或目录是否存在。

示例代码:

#include <shlwapi.h>
#include <stdio.h>
int main() {
    LPCWSTR path = L"C:\\Windows\\System32\\notepad.exe";
    BOOL exists = PathFileExistsW(path);
    if (exists) {
        wprintf(L"文件存在\n");
    } else {
        wprintf(L"文件不存在\n");
    }
    return 0;
}
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上述代码中,首先定义了一个路径C:\Windows\System32\notepad.exe,然后调用PathFileExistsW函数检查该路径下的文件是否存在,根据返回值输出相应的结果。

PathFileExists函数的使用场景:

检查文件是否存在:可以通过PathFileExists函数检查指定路径下的文件是否存在,从而避免出现文件不存在的错误。

检查目录是否存在:可以通过PathFileExists函数检查指定路径下的目录是否存在,从而避免出现目录不存在的错误。

总结:

PathFileExists函数是一个用于检查指定路径下文件或目录是否存在的函数,可以帮助我们在编程中避免出现文件或目录不存在的错误,提高程序的健壮性。

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