工作中免不了需要为自己的程序添加日志，我也从网上扒拉了一个老外写的模块，修改修改了下，凑合用吧。
1 Option Explicit
2 ‘**************************************
3 ‘ 模块名称: AppendToLog 通过API写入日志
4 ‘**************************************
5 ‘API 声明
6 Private Const GENERIC_WRITE = &H40000000
7 Private Const FILE_SHARE_READ = &H1
8 Private Const Create_NEW = 1
9 Private Const OPEN_EXISTING = 3
10 Private Const FILE_ATTRIBUTE_NORMAL = &H80
11 Private Const FILE_BEGIN = 0
12 Private Const INVALID_HANDLE_VALUE = -1
13 Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, ByVal lpSecurityAttributes As Any, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
14 Private Declare Function SetFilePointer Lib "kernel32" (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
15 Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Any) As Long
16 Private Declare Function FlushFileBuffers Lib "kernel32" (ByVal hFile As Long) As Long
17 Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
18
19 ‘调用：Call AppendToLog("测试模块名","测试日志内容")
20 ‘**************************************
21 ‘ 方法名称: AppendToLog
22 ‘ 输入参数:sMdl 模块名称 sMessage 日志内容
23 ‘**************************************
24 Public Sub AppendToLog(sMdl As String, sMessage As String)
25
26 On Error GoTo Err:
27
28 ‘获取计算机名、用户名、本机ip
29 Dim LocalInfo As String
30 Dim strLocalIP As String
31 Dim winIP As Object
32 LocalInfo = LocalInfo & " Computer:" & Environ("computername")
33 LocalInfo = LocalInfo & " User:" & Environ("username")
34 Set winIP = CreateObject("MSWinsock.Winsock")
35 strLocalIP = winIP.LocalIP
36 LocalInfo = LocalInfo & " IP:" & strLocalIP
37
38 Dim lpFileName As String
39 lpFileName = App.Path + "\Log"
40 If Dir(lpFileName, vbDirectory) = "" Then
41 MkDir (lpFileName)
42 End If
43
44 lpFileName = lpFileName + "\" + Format(Now, "yyyymmdd") + ".log"
45
46 sMessage = "--" + Format(Now, "yyyy-mm-dd hh:mm:ss") + " 模块:" + sMdl + LocalInfo + vbNewLine + sMessage + vbNewLine
47 ‘appends a string to a text file.
48 ‘it‘s up to the coder to add a CR/LF at the end
49 ‘of the string if (s)he so desires.
50 ‘assume failure
51 ‘AppendToLog = False
52 ‘exit if the string cannot be written to disk
53 If Len(sMessage) < 1 Then Exit Sub
54 ‘get the size of the file (if it exists)
55 Dim fLen As Long: fLen = 0
56 If (Len(Dir(lpFileName))) Then: fLen = FileLen(lpFileName)
57 ‘open the log file, create as necessary
58 Dim hLogFile As Long
59 hLogFile = CreateFile(lpFileName, GENERIC_WRITE, FILE_SHARE_READ, ByVal 0&, _
60 IIf(Len(Dir(lpFileName)), OPEN_EXISTING, Create_NEW), _
61 FILE_ATTRIBUTE_NORMAL, 0&)
62 ‘ensure the log file was opened properly
63 If (hLogFile = INVALID_HANDLE_VALUE) Then Exit Sub
64 ‘move file pointer to end of file if file was not created
65 If (fLen <> 0) Then
66 If (SetFilePointer(hLogFile, fLen, ByVal 0&, FILE_BEGIN) = &HFFFFFFFF) Then
67 ‘exit sub if the pointer did not set correctly
68 CloseHandle (hLogFile)
69 Exit Sub
70 End If
71 End If
72 ‘convert the source string to a byte array for use with WriteFile
73 Dim lTemp As Long
74 ReDim TempArray(0 To Len(sMessage) - 1) As Byte
75 TempArray = StrConv(sMessage, vbFromUnicode)
76 lTemp = UBound(TempArray) + 1
77 ‘write the string to the log file
78 If (WriteFile(hLogFile, TempArray(0), lTemp, lTemp, ByVal 0&) <> 0) Then
79 ‘the data was written correctly
80 ‘AppendToLog = True
81 End If
82 ‘flush buffers and close the file
83 FlushFileBuffers (hLogFile)
84 CloseHandle (hLogFile)
85 Exit Sub
86 Err:
87 MsgBox "日志写入出错，原因是" + Err.Description, vbExclamation, "提示信息"
88
89 End Sub
VB6-AppendToLog 通过API写入日志
时间： 2024-10-29 19:11:28