如何使用API函数FindFirstFile查找文件？

作者：绿色风分类：时间：2022-08-17 浏览：111

楼主
amulee

Q：如何使用API函数FindFirstFile查找文件？
A：利用API函数FindFirstFile、FindNextFile可以实现文件的查找。其用法和VBA中的Dir函数有些类似。请参考以下代码：

'API声明
Public Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" (ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As Long
Public Declare Function FindNextFile Lib "kernel32" Alias "FindNextFileA" (ByVal hFindFile As Long, lpFindFileData As WIN32_FIND_DATA) As Long
Public Declare Function FindClose Lib "kernel32" (ByVal hFindFile As Long) As Long
'最大路径长度和文件属性常量的定义
Public Const MAX_PATH = 260
'这里有文件属性，包括文件夹、隐藏等。对应dwFileAttributes
Public Const FILE_ATTRIBUTE_ARCHIVE = &H20
Public Const FILE_ATTRIBUTE_COMPRESSED = &H800
Public Const FILE_ATTRIBUTE_DIRECTORY = &H10
Public Const FILE_ATTRIBUTE_HIDDEN = &H2
Public Const FILE_ATTRIBUTE_NORMAL = &H80
Public Const FILE_ATTRIBUTE_READONLY = &H1
Public Const FILE_ATTRIBUTE_SYSTEM = &H4
Public Const FILE_ATTRIBUTE_TEMPORARY = &H100
'文件结构
Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End Type
Type WIN32_FIND_DATA
dwFileAttributes As Long
ftCreationTime As FILETIME
ftLastAccessTime As FILETIME
ftLastWriteTime As FILETIME
nFileSizeHigh As Long
nFileSizeLow As Long
dwReserved0 As Long
dwReserved1 As Long
cFileName As String * MAX_PATH
cAlternate As String * 14
End Type
Sub Main()
Dim FindData As WIN32_FIND_DATA
Dim FindHandle As Long
Dim FindNextHandle As Long
Dim FPath As String
Dim FName As String
FPath = "D:\"
FName = "*.txt"
'开始API查找，找到的文件属性在FindData里
FindHandle = FindFirstFile(FPath & FName, FindData)
'如果找到，则返回不为0。发生错误返回-1
If FindHandle <> 0 And FindHandle <> -1 Then
Debug.Print fDelInvaildChr(FindData.cFileName)
'查找下一个，用法差不多
Do
FindNextHandle = FindNextFile(FindHandle, FindData)
If FindNextHandle <> 0 And FindNextHandle <> -1 Then
Debug.Print fDelInvaildChr(FindData.cFileName)
Else
Exit Do
End If
Loop
End If
'关闭文件搜索
FindClose FindHandle
End Sub
'去除非法字符
Public Function fDelInvaildChr(str As String) As String
On Error Resume Next
Dim i As Long
For i = Len(str) To 1 Step -1
If Asc(Mid(str, i, 1)) <> 0 And Asc(Mid(str, i, 1)) <> 32 Then
fDelInvaildChr = Left(str, i)
Exit For
End If
Next
End Function

API搜索.rar

2楼
wbzxz

amulee老师，您的附件上传错啦，嘿嘿。

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