问题1: MDI子窗体怎么居中啊!我已经有用
Sub CenterForm(frm As Form) '定义窗体居中过程
frm.Move (Screen.Width - frm.Width) \ 2, (Screen.Height - frm.Height) \ 2
End Sub但好像没有用哦!问题2:关于DATAGRID控件的问题:
假如有一个TYPE表里面有BOOK_TYPE,DISK_TYPE两个字段,我怎么在控件中显示数据中的数据.
前提:数据库已经连接 rs_type.open "select * from type",conn,……，……，-1
告诉我怎么进行添加，修改等操作，有例子最好。问题3： 数据备份问题！代码如下，不知道哪有错误，反正就是个空架子！
Dim Fsys As New FileSystemObject
Dim bckupFile As FilePrivate Sub Form_Load()
Dim lastPath As String
Dim lastDate As String
Dim lastTime As String
'Read Registry for previous settings stored
lastPath = GetSetting(App.Title, "Settings", "BackupPath")
lastDate = GetSetting(App.Title, "Settings", "BackupDate")
lastTime = GetSetting(App.Title, "Settings", "BackupTime")
If lastPath = "" Then
lblLastPath.Caption = "以前没有备份"
lblLastDate.Caption = " "
lblLastTime.Caption = " "
Else
lblLastPath.Caption = lastPath
lblLastDate.Caption = lastDate & " (mm-dd-yy)"
lblLastTime.Caption = lastTime
End If
End SubPrivate Sub cmdsave_click()On Error Resume Next
cmdSave.Enabled = False
Label1.Caption = "备份正在进行中, 请稍等..."
Label1.BackColor = vbGreen
Label1.ForeColor = vbYellow
Dim destination As String
Dim Source As String
Dim currDate, currTime As String
currDate = Format$(Now, "mm - dd - yy")
currTime = Format$(Now, "hh:mm:ss AM/PM")
destination = File1.Path & "\" & "Library.mdb"
Source = App.Path & "\Library.mdb"
'MsgBox "Source : " & source
'MsgBox "Destination : " & destination
Set bckupFile = Fsys.GetFile(finalpath)
bckupFile.Attributes = Compressed
Fsys.CopyFile Source, destination, True
'Saving Current Backup Details
SaveSetting App.Title, "Settings", "BackupPath", destination
SaveSetting App.Title, "Settings", "BackupDate", currDate
SaveSetting App.Title, "Settings", "BackupTime", currTime
Label1.Caption = "[email protected]"
Label1.BackColor = vbYellow
Label1.ForeColor = vbBlue
cmdSave.Enabled = True
MsgBox "备份完成", vbInformation, "备份"
Unload Me
End SubPrivate Sub Drive1_Change()
Dir1.Path = Drive1.Drive
End SubPrivate Sub Dir1_Change()
File1.Path = Dir1.Path
End Sub
问题4： 怎么在VB中附加SQL数据库呢？就是在SUB MAIN（）事件的时候判断如果当前软件运行路径下如果有数据库则不附加，如果没有则附加！ 有代码最好了~问题5：如何初始化数据啊？先谢谢各位大虾了！
Sub CenterForm(frm As Form) '定义窗体居中过程
frm.Move (Screen.Width - frm.Width) \ 2, (Screen.Height - frm.Height) \ 2
End Sub但好像没有用哦!问题2:关于DATAGRID控件的问题:
假如有一个TYPE表里面有BOOK_TYPE,DISK_TYPE两个字段,我怎么在控件中显示数据中的数据.
前提:数据库已经连接 rs_type.open "select * from type",conn,……，……，-1
告诉我怎么进行添加，修改等操作，有例子最好。问题3： 数据备份问题！代码如下，不知道哪有错误，反正就是个空架子！
Dim Fsys As New FileSystemObject
Dim bckupFile As FilePrivate Sub Form_Load()
Dim lastPath As String
Dim lastDate As String
Dim lastTime As String
'Read Registry for previous settings stored
lastPath = GetSetting(App.Title, "Settings", "BackupPath")
lastDate = GetSetting(App.Title, "Settings", "BackupDate")
lastTime = GetSetting(App.Title, "Settings", "BackupTime")
If lastPath = "" Then
lblLastPath.Caption = "以前没有备份"
lblLastDate.Caption = " "
lblLastTime.Caption = " "
Else
lblLastPath.Caption = lastPath
lblLastDate.Caption = lastDate & " (mm-dd-yy)"
lblLastTime.Caption = lastTime
End If
End SubPrivate Sub cmdsave_click()On Error Resume Next
cmdSave.Enabled = False
Label1.Caption = "备份正在进行中, 请稍等..."
Label1.BackColor = vbGreen
Label1.ForeColor = vbYellow
Dim destination As String
Dim Source As String
Dim currDate, currTime As String
currDate = Format$(Now, "mm - dd - yy")
currTime = Format$(Now, "hh:mm:ss AM/PM")
destination = File1.Path & "\" & "Library.mdb"
Source = App.Path & "\Library.mdb"
'MsgBox "Source : " & source
'MsgBox "Destination : " & destination
Set bckupFile = Fsys.GetFile(finalpath)
bckupFile.Attributes = Compressed
Fsys.CopyFile Source, destination, True
'Saving Current Backup Details
SaveSetting App.Title, "Settings", "BackupPath", destination
SaveSetting App.Title, "Settings", "BackupDate", currDate
SaveSetting App.Title, "Settings", "BackupTime", currTime
Label1.Caption = "[email protected]"
Label1.BackColor = vbYellow
Label1.ForeColor = vbBlue
cmdSave.Enabled = True
MsgBox "备份完成", vbInformation, "备份"
Unload Me
End SubPrivate Sub Drive1_Change()
Dir1.Path = Drive1.Drive
End SubPrivate Sub Dir1_Change()
File1.Path = Dir1.Path
End Sub
问题4： 怎么在VB中附加SQL数据库呢？就是在SUB MAIN（）事件的时候判断如果当前软件运行路径下如果有数据库则不附加，如果没有则附加！ 有代码最好了~问题5：如何初始化数据啊？先谢谢各位大虾了！
Sub CenterForm(frm As Form) '定义窗体居中过程
frm.Move (Screen.Width - frm.Width) \ 2, (Screen.Height - frm.Height) \ 2
End Sub
Private Sub Form_Load()
CenterForm Me
End Sub
Public Sub CenterForm(frm As Form)
frm.Move (Screen.Width - frm.Width) \ 2, (Screen.Height - frm.Height) \ 2
End Sub
If cmbDB.Text = "Access" Then
Conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & mdbpath & ";Persist Security Info=False"
Else
Conn.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=" & useId & ";pwd=" & pd1 & ";Data Source=" & serverName
End If
str1 = Text1.Text
Set Rs = Conn.Execute(str1)
If Not Rs.EOF Then
Rs.MoveFirst
MSFlexGrid3.Rows = Rs.RecordCount + 2
MSFlexGrid3.Cols = Rs.Fields.Count
For z = 0 To Rs.Fields.Count - 1
MSFlexGrid3.TextMatrix(0, z) = Rs.Fields(z).Name
Next z p = 1
Do While Not Rs.EOF
For n = 0 To Rs.Fields.Count - 1
If IsNull(Rs.Fields(n).Value) Then
tempz = "---"
Else
tempz = Rs.Fields(n).Value
End If
MSFlexGrid3.TextMatrix(p, n) = tempz
Next n
p = p + 1
Rs.MoveNext
Loop
Rs.Close
End If
Conn.Close
End Sub
, ByVal sDataBaseName$ _
, Optional ByVal sIsAddBackup As Boolean = False _
) As String
Dim iDb As ADODB.Connection
Dim iConcStr$, iSql$, iReturn$
On Error GoTo lbErr
'创建对象
Set iDb = New ADODB.Connection
'连接数据库服务器,根据你的情况修改连接字符串
iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj"
iDb.Open iConcStr
'生成数据库备份语句
iSql = "backup database [" & sDataBaseName & "]" & vbCrLf & _
"to disk='" & sBackUpfileName & "'" & vbCrLf & _
"with description='" & "zj-backup at:" & Date & "(" & Time & ")'" & vbCrLf & _
IIf(sIsAddBackup, "", ",init")
iDb.Execute iSql
GoTo lbExit
lbErr:
iReturn = Error
lbExit:
fBackupDatabase_a = iReturn
End FunctionPublic Function fRestoreDatabase_a(ByVal sBackUpfileName$ _
, ByVal sDataBaseName$ _
, Optional ByVal sDataBasePath$ = "" _
, Optional ByVal sBackupNumber& = 1 _
, Optional ByVal sReplaceExist As Boolean = False _
) As String
Dim iDb As ADODB.Connection, iRe As ADODB.Recordset
Dim iConcStr$, iSql$, iReturn$, iI&
On Error GoTo lbErr
'创建对象
Set iDb = New ADODB.Connection
Set iRe = New ADODB.Recordset
'连接数据库服务器,根据你的情况修改连接字符串
iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj"
iDb.Open iConcStr
'得到还原后的数据库存放目录,如果没有指定,存放到SQL SERVER的DATA目录
If sDataBasePath = "" Then
iSql = "select filename from master..sysfiles"
iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly
iSql = iRe(0)
iRe.Close
sDataBasePath = Left(iSql, InStrRev(iSql, "\"))
End If
'检查数据库是否存在
If sReplaceExist = False Then
iSql = "select 1 from master..sysdatabases where name='" & sDataBaseName & "'"
iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly
If iRe.EOF = False Then
iReturn = "数据库已经存在!"
iRe.Close
GoTo lbExit
End If
iRe.Close
End If
'关闭用户进程,防止其它用户正在使用数据库,导致数据恢复失败
iSql = "select spid from master..sysprocesses where dbid=db_id('" & sDataBaseName & "')"
iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly
While iRe.EOF = False
iSql = "kill " & iRe(0)
iDb.Execute iSql
iRe.MoveNext
Wend
iRe.Close
'获取数据库恢复信息
iSql = "restore filelistonly from disk='" & sBackUpfileName & "'" & vbCrLf & _
"with file=" & sBackupNumber
iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly
'生成数据库恢复语句
iSql = "restore database [" & sDataBaseName & "]" & vbCrLf & _
"from disk='" & sBackUpfileName & "'" & vbCrLf & _
"with file=" & sBackupNumber & vbCrLf
With iRe
While Not .EOF
iReturn = iRe("PhysicalName")
iI = InStrRev(iReturn, ".")
iReturn = IIf(iI = 0, "", Mid(iReturn, iI)) & "'"
iSql = iSql & ",move '" & iRe("LogicalName") & _
"' to '" & sDataBasePath & sDataBaseName & iReturn & vbCrLf
.MoveNext
Wend
.Close
End With
iSql = iSql & IIf(sReplaceExist, ",replace", "")
iDb.Execute iSql
iReturn = ""
GoTo lbExit
lbErr:
iReturn = Error
lbExit:
fRestoreDatabase_a = iReturn
End Function
Me.Move (MDIForm1.Width - Me.Width) \ 2, (MDIForm1.Height - Me.Height) \ 2