用VB6.0编写自我升级的程序
用VB6.0编写自我升级的程序
作者:谢家峰 来源于:中国VB网 发布时间:2004-11-22
曾经有位网友和我讨论怎样编写一个通过服务器对客户机上的程序进行自我升级的问题,由于我的项目也涉及到自我升级,当时我把我的解决方案提了出来,那就是做一个类似于瑞星的升级程序。在这里我也发现了很多的网友对这个问题很困惑,故我愿意把我的设计方案写出来与大家共享,大家也可以通过这个思路用其他语言进行改写。
以下是我的具体思路:
写两个程序,一个是主程序;一个是升级程序(升级程序放在服务器上);
说明:所有升级任务都由升级程序完成。
1.启动升级程序,升级程序连接到网站,下载新的主程序(当然还包括支持的库文件等)到临时文件夹;
2.升级程序检测旧的主程序是否活动,若活动则关闭旧的主程序(同时记下主程序的状态);
3.删除旧的主程序,拷贝临时文件夹中的文件到相应的位置,同时注册相应的文件;
4.检查主程序的状态,若状态为活动的,则启动新的主程序;
5.关闭升级程序。
6.祝贺你,升级完成。
下面进行具体的程序编写,需建立三个工程,然后把它们编辑成一个组,三个工程需共用一个模块。
建立工程步骤:
1. 建立工程proMain:打开vb,“新建工程”,选择“标准EXE”, 再给工程中添加模块,并且命名为modCommon,修改窗体名为frmMain,同时修改工程名为projMain,然后保存到某个文件夹(譬如在桌面建立个文件夹Update),窗体、模块和工程分别保存为frmMain.frm、modCommon.bas、projMain.vbp;
2. 建立工程projNewMain:点击菜单“文件|新建工程” ,选择“标准EXE”,点击菜单“工程|添加模块”,在弹出的对话框中选择“现存”标签,定位到Update文件夹,选中modCommon.bas模块。修改窗体名为frmNewMain,同时修改工程名为projNewMain,然后保存到Update文件夹,窗体和工程分别保存为frmNewMain.frm、projNewMain.vbp;
3. 建立工程projUpdate:点击菜单“文件|新建工程” ,选择“标准EXE”,点击菜单“工程|添加模块”,在弹出的对话框中选择“现存”标签,定位到Update文件夹,选中modCommon.bas模块。修改窗体名为frmUpdate,同时修改工程名为projUpdate,然后保存到Update文件夹,窗体和工程分别保存为frmUpdate.frm、projUpdate.vbp;
4. 建立组:在工程projUpdate中,点击菜单“文件|添加工程…”在弹出的对话框中选择“现存”标签,定位到Update文件夹,选择projMain.vbp;重复该动作,选择projNewMain.vbp;保存该组即可;
5. 关闭工程,定位到Update文件夹,然后执行下面的步骤。
各个工程文件中的文件源码:
一、 projMain.vbp工程:
说明:这个是旧的主程序,从来没有进行过升级前的程序。
用记事本打开frmMain.frm文件,copy以下内容到其中:
VERSION 5.00
Begin VB.Form frmMain
Caption = "请点击升级进行程序"
ClientHeight = 1140
ClientLeft = 60
ClientTop = 345
ClientWidth = 4500
LinkTopic = "Form1"
ScaleHeight = 1140
ScaleWidth = 4500
StartUpPosition = 3 窗口缺省
Begin VB.CommandButton Command1
Caption = "升级"
Height = 525
Left = 1380
TabIndex = 0
Top = 570
Width = 1245
End
End
Attribute VB_Name = "frmMain"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
------------------------------------------
升级程序的例子
作者: 谢家峰
日期: 2003/12/19
这里是没有升级时的主程序
------------------------------------------
Private Sub Command1_Click()
Command1.Enabled = False
运行更新程序
Shell App.Path & "\update.exe", vbNormalFocus
End Sub
Private Sub Form_Load()
If App.PrevInstance Then End
UpdateIniPath = App.Path & "\Update.ini"
记录主程序的名字
WritePrivateProfileString "Main", "Name", App.EXEName, UpdateIniPath
记录运行状态
WritePrivateProfileString "Main", "Active", "-1", UpdateIniPath
记录更新次数
WritePrivateProfileString "Update", "Num", "0", UpdateIniPath
Me.Caption = App.EXEName
End Sub
Private Sub Form_Unload(Cancel As Integer)
记录运行状态
WritePrivateProfileString "Main", "Active", "0", UpdateIniPath
End Sub
用记事本打开modCommon.bas文件,copy以下内容到其中:
Attribute VB_Name = "modCommon"
Option Explicit
------------------------------------------
升级程序的例子
作者: 谢家峰
日期: 2003/12/19
这里是通用模块,放置API函数以及公用函数
------------------------------------------
Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Public Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal lSize As Long, ByVal lpFilename As String) As Long
Public Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As Any, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lplFilename As String) As Long
Public Declare Function GetPrivateProfileSection Lib "kernel32" Alias "GetPrivateProfileSectionA" (ByVal lpAppName As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFilename As String) As Long
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Const WM_Close = &H10
Private Const gintMAX_SIZE% = 255 Maximum buffer size
Public UpdateIniPath As String
===============================================
从资源文件中提取文件
===============================================
Public Function SaveFileFromRes(vntResourceID As Variant, sType As String, sFileName As String) As Boolean
Dim bytImage() As Byte
Dim iFileNum As Integer
On Error GoTo SaveFileFromRes_Err
SaveFileFromRes = True
bytImage = LoadResData(vntResourceID, sType)
iFileNum = FreeFile
Open sFileName For Binary As iFileNum
Put #iFileNum, , bytImage
Close iFileNum
Exit Function
SaveFileFromRes_Err:
SaveFileFromRes = False: Exit Function
End Function
===============================================
从缓冲区中读取字符串
===============================================
Private Function StringFromBuffer(Buffer As String) As String
Dim nPos As Long
nPos = InStr(Buffer, vbNullChar)
If nPos > 0 Then
StringFromBuffer = Left$(Buffer, nPos - 1)
Else
StringFromBuffer = Buffer
End If
End Function
===============================================
读Ini文件
===============================================
Public Function ReadIniFile(ByVal strIniFile As String, ByVal strSection As String, ByVal strKey As String, Optional ByVal strKeyDefault As String = vbNullString) As String
Dim strBuffer As String
strBuffer = Space$(gintMAX_SIZE)
If GetPrivateProfileString(strSection, strKey, strKeyDefault, strBuffer, gintMAX_SIZE, strIniFile) Then
ReadIniFile = StringFromBuffer(strBuffer)
End If
End Function
检查文件是否存在
Function FileExists(filename As String) As Boolean
On Error Resume Next
FileExists = (Dir$(filename) "")
End Function
改变标签的文本及位置
Public Function ChangeLabelPos(frm As Form, lbl As Label, msg As String)
With lbl
.Caption = msg
.Left = (frm.ScaleWidth - .Width) / 2
.Top = .Height / 2
End With
End Function
关闭窗体
Function CloseValidForm(Ret As String) As Boolean
Dim WinWnd As Long
搜寻该窗口的句柄
WinWnd = FindWindow(vbNullString, Ret)
If WinWnd 0 Then
SendMessage WinWnd, WM_Close, 0&, 0&
End If
CloseValidForm = True
End
二、 projNewMain.vbp工程:
说明:这个是新的主程序,即升级后的主程序,由于我目前没有服务器,故将该程序放在projUpdate.vbp工程的资源文件中。在projUpdate.vbp中模拟网络升级。
用记事本打开frmNewMain.frm文件,copy以下内容到其中:
VERSION 5.00
Begin VB.Form frmNewMain
Appearance = 0 Flat
BackColor = &H80000005&
Caption = "Form1"
ClientHeight = 1365
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 1365
ScaleWidth = 4680
StartUpPosition = 3 窗口缺省
Begin VB.CommandButton Command1
Caption = "升级"
Height = 525
Left = 1410
TabIndex = 0
Top = 660
Width = 1245
End
Begin VB.Label lblCap
Caption = "告诉你,我已经升级了,没看出和以前不一样了吗?"
Height = 255
Left = 120
TabIndex = 1
Top = 60
Width = 4275
End
End
Attribute VB_Name = "frmNewMain"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
------------------------------------------
升级程序的例子
作者: 谢家峰
日期: 2003/12/19
这里是升级后的主程序
------------------------------------------
Private Sub Command1_Click()
Command1.Enabled = False
运行更新程序
Shell App.Path & "\update.exe", vbNormalFocus
End Sub
Private Sub Form_Load()
Dim i As Integer
If App.PrevInstance Then End
UpdateIniPath = App.Path & "\Update.ini"
记录主程序的名字
WritePrivateProfileString "Main", "Name", App.EXEName, UpdateIniPath
记录运行状态
WritePrivateProfileString "Main", "Active", "-1", UpdateIniPath
Me.Caption = App.EXEName
End Sub
Private Sub Form_Unload(Cancel As Integer)
记录运行状态
WritePrivateProfileString "Main", "Active", "0", UpdateIniPath
End Sub
三、 projUpdate.vbp工程:
说明:这是升级程序,含有一个资源文件。
用记事本打开frmUpdate.frm文件,copy以下内容到其中:
VERSION 5.00
Begin VB.Form frmUpdate
BackColor = &H80000007&
BorderStyle = 0 None
Caption = "Form1"
ClientHeight = 1185
ClientLeft = 0
ClientTop = 0
ClientWidth = 5400
LinkTopic = "Form1"
MaxButton = 0 False
MinButton = 0 False
ScaleHeight = 1185
ScaleWidth = 5400
ShowInTaskbar = 0 False
StartUpPosition = 2 屏幕中心
Begin VB.CommandButton Command1
Appearance = 0 Flat
Caption = "关闭"
Height = 435
Left = 2130
TabIndex = 0
Top = 630
Visible = 0 False
Width = 1245
End
Begin VB.Label lblCap
AutoSize = -1 True
BackStyle = 0 Transparent
BeginProperty Font
Name = "宋体"
Size = 12
Charset = 134
Weight = 400
Underline = 0 False
Italic = 0 False
Strikethrough = 0 False
EndProperty
ForeColor = &H000000FF&
Height = 240
Left = 330
TabIndex = 1
Top = 150
Width = 120
End
Begin VB.Shape Shape1
BackColor = &H00C0FFFF&
BackStyle = 1 Opaque
BorderColor = &H0000FF00&
Height = 1065
Left = 60
Top = 60
Width = 5265
End
End
Attribute VB_Name = "frmUpdate"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
------------------------------------------
升级程序的例子
作者: 谢家峰
日期: 2003/12/19
这里是升级程序
------------------------------------------
Dim State As Boolean
Private Sub Command1_Click()
Unload Me
End Sub
Private Sub Form_Activate()
Dim i As Integer
Dim j As String
Dim OldExeFile As String
Dim NewExeFile As String
Dim tmpFile As String
Dim MainState As Boolean
DoEvents
If State Then
获取旧主程序名称
OldExeFile = CStr(ReadIniFile(UpdateIniPath, "Main", "Name", "主程序"))
NewExeFile = OldExeFile
OldExeFile = App.Path & "\" & OldExeFile & ".exe"
tmpFile = App.Path & "\tmp.tmp"
改写升级次数
i = CInt(ReadIniFile(UpdateIniPath, "Update", "Num", "0"))
i = i + 1
ChangeLabelPos Me, lblCap, "这是您第" & i & "次升级!"
Sleep 1500
摸拟从网站下载新的更新程序。
ChangeLabelPos Me, lblCap, "正在 摸拟从网站下载新的升级程序 ..."
Sleep 1000
On Error Resume Next
Kill tmpFile
此处可以修改为将临时文件放在临时文件夹内
SaveFileFromRes 101, "CUSTOM", tmpFile
Sleep 1000
On Error GoTo 0
检查主程序是否开启,若开启则关闭旧程序
MainState = CBool(CInt(ReadIniFile(UpdateIniPath, "Main", "Active", "0")))
If MainState Then
关闭旧程序
ChangeLabelPos Me, lblCap, "正在关闭旧程序 ... "
Sleep 300
这里强行关闭旧程序
你也可以发送消息,让旧程序自己关闭
Do While -1
DoEvents
If CloseValidForm(NewExeFile) Then
Exit Do
End If
Loop
Sleep 200
End If
删除旧程序
On Error Resume Next
ChangeLabelPos Me, lblCap, "正在删除旧程序 ... "
Sleep 1000
Kill OldExeFile
Sleep 1000
生成新主程序名称
NewExeFile = CStr(ReadIniFile(UpdateIniPath, "Main", "Name", "主程序"))
j = Right(NewExeFile, 1)
If IsNumeric(j) Then
j = i
NewExeFile = Left(NewExeFile, Len(NewExeFile) - 1)
Else
j = 1
End If
记录主程序的名字
NewExeFile = NewExeFile & j
WritePrivateProfileString "Main", "Name", NewExeFile, UpdateIniPath
NewExeFile = App.Path & "\" & NewExeFile & ".exe"
拷贝新程序
ChangeLabelPos Me, lblCap, "正在更新程序 ... "
Sleep 1000
FileCopy tmpFile, NewExeFile
Sleep 1000
删除临时程序
Kill tmpFile
记录更新次数
WritePrivateProfileString "Update", "Num", CStr(i), UpdateIniPath
检查旧程序的状态
If MainState Then
ChangeLabelPos Me, lblCap, "正在启动更新后的主程序 ... "
Sleep 1000
Shell NewExeFile, vbNormalNoFocus
End If
关闭更新程序
Command1.Visible = True
ChangeLabelPos Me, lblCap, "更新完成,请等待 3 秒后将自动关闭更新程序 ..."
Sleep 3000
lblCap.Refresh
Unload Me
End If
End Sub
Private Sub Form_Load()
If App.PrevInstance Then End
UpdateIniPath = App.Path & "\Update.ini"
State = True
End Sub
完成了三个工程的代码拷贝,在代码的必要之处我都进行了详细注释,这里我就不再介绍代码了,现在进行最后一步,模拟从网站下载升级后的程序。
a. 打开projMain.vbp,编译该工程,并且命名为“主程序.exe”;
b. 打开projNewMain.vbp,编译该工程,并且命名为“projNewMain.exe”;
c. 打开projUpdate.vbp,打开工具栏上的“vb资源编辑器”(若没找到,读者需要点击菜单“外接程序|外接程序管理器”,在打开的对话框中选择“vb6资源编辑器”,在加载行为中选择“加载/卸载”复选框),在资源编辑器中选择“添加自定义资源 …”,在打开的对话框中定位到Update文件夹,选择projNewMain.exe文件,保存该资源文件,最后编译该工程并且命名为“Update.exe”。
d. 将可执行文件“主程序.exe”、“Update.exe”拷贝到同一个文件夹中,运行任一个程序,相信读者会看到效果。
以上代码比较简单,仅供读者分析思路用。在实际工程中的代码编写时也根本没必要把projNewMain.exe放在资源文件中,读者只需将它放在服务器的某个位置,然后在projUpdate.vbp中的相应处写下载代码即可。
Ok,文章至此编写完成,希望对各位读者能有所帮助。
附:本人已在CSDN上发布了源码,等管理员审核完毕,本人再将链接地址补上。