access VBA教材-6-小周专栏

数据输入、查询、计算、连接：
通过英特网的ACCESS联接
在ACCESS中使用ADO：
Private Sub ABC_Click()
Dim cn As New ADODB.Connection
Dim rs As New ADODB.Recordset
cn.OPEN "DSN=alwin;UID=;PWD=;"
rs.OPEN "Select * from tbTABLE", cn, adOpenDynamic, adLockReadOnly’
rs.ABC App.Path & "\testdata.dat", adPersistADTG
rs.Close
cn.Close
MsgBox ("OPERATION OK")
End Sub
Private Sub OPEN_Click()
Dim strConnect As String
strConnect = "Provider=MSPersist"
Dim rs As New ADODB.Recordset
rs.OPEN "http://远程服务器的IP/test/testdata.dat", strConnect
Do While Not rs.EOF
Debug.Print rs("USERID").value
rs.MoveNext
Loop
End Sub

将用户输入的身份证号15位数据转化为18位。
Function IDCode15to18(sCode15 As String) As String
　　'*　功能:将15的身份证号升为18位(根据GB 11643-1999)
　　'*　参数:原来的号码
　　'*　返回:升位后的18位号码
　　Dim i As Integer
　　Dim num As Integer
　　Dim code As String
　　num = 0
　　IDCode15to18 = Left(sCode15, 6) + "19" + Right(sCode15, 9)
　　'　计算校验位
　　For i = 18 To 2 Step -1
　　　num = num + (2 ^ (i - 1) Mod 11) * (Mid(IDCode15to18, 19 - i, 1))
　　Next i
　　num = num Mod 11
　　Select Case num
　　Case 0
　　　code = "1"
　　Case 1
　　　code = "0"
　　Case 2
　　　code = "X"
　　Case Else
　　　code = Trim(Str(12 - num))
　　End Select
　　IDCode15to18 = IDCode15to18 + code
End Function
据身份证号自动输入出生日期
Dim Length As Integer

Length = Len(Me.[身份证号])

If Not IsNull(Length) Then

If Length = 15 Then
   Me.[性别] = IIf(Val(Mid(Me.身份证号, 15, 1)) / 2 = Int(Val(Mid(Me.身份证号, 15, 1)) / 2), "女", "男")
   Me.[出生日期] = "19" & Mid([身份证号], 7, 2) & "-" & Mid([身份证号], 9, 2) & "-" & Mid([身份证号], 11, 2)

   ElseIf Length = 18 Then
      Me.[性别] = IIf(Val(Mid(Me.身份证号, 17, 1)) / 2 = Int(Val(Mid(Me.身份证号, 17, 1)) / 2), "女", "男")
      Me.[出生日期] = Mid([身份证号], 7, 4) & "-" & Mid([身份证号], 11, 2) & "-" & Mid([身份证号], 13, 2)
   Else
      MsgBox "身份证号错误！"

   End If

End If
两行代码打开另一数据库
Private Sub 命令4_Click()
On Error GoTo Err_命令4_Click
Dim strDb As String
strDb = "C:\db1.mdb"
SendKeys "{F11}%FO" & strDb & "{enter}"
Exit_命令4_Click:
    Exit Sub
Err_命令4_Click:
    MsgBox Err.Description
    Resume Exit_命令4_Click

End Sub

实现打开外部数据库中的报表。
Private Declare Function apiSetForegroundWindow Lib "user32" _
            Alias "SetForegroundWindow" _
            (ByVal hwnd As Long) _
            As Long

Private Declare Function apiShowWindow Lib "user32" _
            Alias "ShowWindow" _
            (ByVal hwnd As Long, _
            ByVal nCmdShow As Long) _
            As Long

Private Const SW_MAXIMIZE = 3
Private Const SW_NORMAL = 1

Function fOpenRemoteReport(strMDB As String, strReport As String, _
Optional intView As Variant) _
As Boolean
' strMDB: 外部数据库名称(含路径)
' strReport: 报表名称
' intView: 报表的打开方式

Dim objAccess As Access.Application
Dim lngRet As Long

On Error GoTo fOpenRemoteReport_Err

If IsMissing(intView) Then intView = acViewPreview

    If Len(Dir(strMDB)) > 0 Then
        Set objAccess = New Access.Application
        With objAccess
            lngRet = apiSetForegroundWindow(.hWndAccessApp)
            lngRet = apiShowWindow(.hWndAccessApp, SW_NORMAL)
            ' 第一次调用ShowWindow似乎不做任何事情
            lngRet = apiShowWindow(.hWndAccessApp, SW_NORMAL)
            .OpenCurrentDatabase strMDB
            .DoCmd.OpenReport strReport, intView
            Do While Len(.CurrentDb.Name) > 0
                DoEvents
            Loop
        End With
    End If

fOpenRemoteReport_Exit:
    On Error Resume Next
    objAccess.Quit
    Set objAccess = Nothing
    Exit Function

fOpenRemoteReport_Err:
    fOpenRemoteReport = False
    Select Case Err.Number
        Case 7866:
            ' mdb 已经被用独占方式打开
            MsgBox "该数据库：" & strMDB & _
                vbCrLf & "已经被用独占方式打开！" & vbCrLf _
                & vbCrLf & "请重新用共享方式打开，再试一次！", _
                vbExclamation + vbOKOnly, "不能打开数据库"
        Case 2103:
            ' 报表不存在
            MsgBox "在这个" & strMDB & "数据库中不存在该报表：" & strReport & _
                        vbCrLf & vbCrLf , _
                        vbExclamation + vbOKOnly, "报表不存在"
        Case 7952:
            ' 用户关闭了这个 mdb
            fOpenRemoteReport = True
        Case Else:
            MsgBox "错误#: " & Err.Number & vbCrLf & Err.Description, _
                    vbCritical + vbOKOnly, "运行时错误"
    End Select
    Resume fOpenRemoteReport_Exit
End Function

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