vb.net编写日志记录 net怎么记录日志
在vb.net 中,记录系统错误日志这个功能怎么实现
Public Sub ShowError(strModule As String, strProcedure As String, lngErrorNumber As Long, strErrorDescription As String, showMsg As String)
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'
'错误处理中心过程,写数据库日志表或写日志文件
'
'strModule '模块名称
'strProcedure '过程名称
'lngErrorNumber '错误ID号
'strErrorDescription '错误描述
'showMsg '是否显示本过程内错误显示信息(值:"Y" or "N")
'Error表结构(f001 (Date)发生时间, f002 (nvarchar50)模块名称, f003 (nvarchar50)过程名称, f004 (nvarchar50)错误ID号, _
f005 (nvarchar300)错误描述,f006 (nvarchar50)版 本 号, f007 (nvarchar50)用户名称, f008 (nvarchar50)网卡地址
'ErrorCode表结构 f001 (nvarchar20)错误代码, f002 (nvarchar255)错误信息, f003 (numeric9)错误级别
' 级别说明: '10'以下,一般错误,不影响操作
' '11-20',严重错误,不能操作,程序执行退出
On Error GoTo ErrorHandle
Dim strMessage As String
Dim strCaption As String
Dim sVer As String
Dim intLogFile As Integer
Dim Res As New ADODB.Recordset
Dim ResErrorCode As New ADODB.Recordset
Dim strSQL As String
'对应错误号,从ErrorCode表中找到对应的错误信息,0-1000 错误号保留给VB
DBOpen ResErrorCode, "select * from errorcode where f001='" lngErrorNumber "'"
If Not (ResErrorCode.EOF Or ResErrorCode.BOF) Then
strMessage = ResErrorCode.Fields("f002")
If ResErrorCode.Fields("f003") 10 Then
MsgBox "产生一个严重错误,可能影响到系统的可操作性,请立即联系本系统开发人员!", vbCritical, "严重错误"
End If
End If
'写错误入文件----------------------------
intLogFile = FreeFile
Open App.Path "\" strIni.LogFile For Append As #intLogFile
Print #intLogFile, "***错误"; VBA.Now "*** " "Version:" _
str$(App.Major) "." str$(App.Minor) "." Format(App.Revision, "0000")
Print #intLogFile, "Error: " lngErrorNumber
Print #intLogFile, "Description: " strErrorDescription
Print #intLogFile, "Module: " strModule
Print #intLogFile, "Procedure: " strProcedure
Print #intLogFile, ""
Close #intLogFile
If Len(strMessage) 2 Then strErrorDescription = strMessage
strMessage = "错误: " "(" lngErrorNumber ")" strErrorDescription vbCrLf vbCrLf _
"模块:" strModule "; 过程:" strProcedure
sVer = Trim(str$(App.Major) "." str$(App.Minor) "." _
Format(App.Revision, "0000"))
strCaption = "错误 Version: " sVer
'写错误入数据库表--------------------------
strSQL = "insert into error(f001,f002,f003,f004,f005,f006,f007,f008) values(" _
DateFmtB VBA.Now DateFmtE "," _
IIf(Len(Trim(strModule)) = 0, "null", "'" strModule "'") "," _
IIf(Len(Trim(strProcedure)) = 0, "null", "'" strProcedure "'") "," _
IIf(Len(Trim(lngErrorNumber)) = 0, "null", "'" lngErrorNumber "'") "," _
IIf(Len(Trim(strErrorDescription)) = 0, "null", "'" Replace(strErrorDescription, "'", "") "'") "," _
IIf(Len(Trim(sVer)) = 0, "null", "'" sVer "'") "," _
IIf(Len(Trim(sUserName)) = 0, "null", "'" sUserName "'") "," _
IIf(Len(Trim(sVer)) = 0, "null", "'" EthernetNO "'") ")"
Cn.Execute strSQL
'是否显示未知错误信息
If Trim(UCase(showMsg)) = "Y" Then MsgBox strMessage, vbCritical, strCaption
PROC_EXIT:
Set Res = Nothing
Set ResErrorCode = Nothing
Exit Sub
ErrorHandle:
Resume Next
编写VB程序，当程序启动时，生成一条日志记录
'很简单，添加一个过程 MyLog
'在 Form_Load 中加入 Call MyLog("启动")
'在 Form_Unload 中加入 Call MyLog("退出")
Private Sub Form_Load()
Call MyLog("启动")
End Sub
Private Sub Form_Unload(Cancel As Integer)
Call MyLog("退出")
End Sub
Private Sub MyLog(nStr As String)
Dim F As String, H As Long
nStr = Format(Now, "yyyy-mm-dd hh:mm:ss") nStr
F = "C:\myprog.log"
'如果要将文件保存到与你的 exe 相同的文件夹，将上句改为 F = App.Path "\myprog.log"
H = FreeFile
Open F For Append As #H
Print #H, nStr
Close #H
End Sub
vb怎么记录日志文件
'记录数据
open "c:\log.txt" For Output As #2 ’写文件
Print #2, "用户：" USERNAME "操作时间：" date " " time "操作项目：登陆系统！"
Close #2
' 查看数据,并且在list1中一条条显示出来
Open "c:\log.txt" For Input As #1 ’读文件
Dim i As String
Do While Not EOF(1)
Line Input #1, i '逐行把1号文件读入到变量i
list1.AddItem i
Loop
Close #1
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