1.判断列内是否有重复值：
Dim arrT As Range
Dim rng As Range
Set arrT = Range("A:A")'判读A列单元格
For Each rng In arrT
If rng = Empty Then'如果单元格为空就退出循环，否者循环65535次
Exit For
End If
k = Application.CountIf(arrT, rng)’用CountIf函数扫描出重复值，跟excel的CountIF函数一样
If k > 1 Then
rng.Select
MsgBox rng.Address & " has duplicate data.'输出提示信息，程序结束
End
End If
Next
2.得到指定范围内非空单元格的数量
Dim n As Long
n = Application.WorksheetFunction.CountA(Range("A:A")) 'Count of non-empty data in colum A
3.清空指定sheet页
ActiveWorkbook.Worksheets("test").UsedRange.ClearContents
4.连接DB,并将从DB取得的集合放Sheet页的指定行
Set dbConn = CreateObject("ADODB.Connection")
Set resSet = CreateObject("ADODB.Recordset")
Rem ---------------------------------------
strConn = "Provider=MSDAORA.1; user id=" & USER_ID & "; password=" & PASSWORD & "; data source = " & DATA_SOURCE & "; Persist Security Info=True"
'Add reference: Microsoft ActiveX Data Objects 2.8
'Library,Microsoft ActiveX Data Objects Recordset 2.8 Library
Rem------------------------------------------
dbConn.Open strConn
If dbConn.State <> adStateOpen Then
MsgBox "DB Connect failed.Please Add reference: Microsoft ActiveX Data Objects 2.8 Library"
connectDB = False
End
End If
'select sql
Set resSet = dbConn.Execute("select * from dual")
If (resSet.BOF And resSet.EOF) Then
dbConn.Close
connectDB = False
End
End If
'preset result
Sheet1.Range("A2").CopyFromRecordset resSet
'close connect
dbConn.Close
connectDB = True
5.使单元格不可编辑
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Target.Column = 2 Or Target.Column = 3 Or Target.Column = 4 Or Target.Column = 5 Or Target.Column = 6 Or Target.Column = 7 Or Target.Column = 8 Then
If Cells(Target.Row, Target.Column) <> "" Then
Beep
Cells(Target.Row, 1).Offset(0, 0).Select
'MsgBox Cells(Target.Row, Target.Column).Address & " cannot be selected and edited as it is a read-only cell", _
'vbInformation, "Tool"
End If
End If
End Sub
6.check是不是文件夹或者文件
Public Function FileFolderExists(strFullPath As String) As Boolean
On Error GoTo EarlyExit
If Not Dir(strFullPath, vbDirectory) = vbNullString Then FileFolderExists = True
EarlyExit:
On Error GoTo 0
End Function
7.文件copy
Set Fso = CreateObject("Scripting.FileSystemObject")
Fso.CopyFile fromPath, toPath
8.创建和删除文件夹
Set fs = CreateObject("scripting.filesystemobject")
fs.deleteFolder LocalFolderPath
fs.createFolder LocalFolderPath
9.用命令创建网络连接盘符
Dim objshell As Object
Dim DosExec As Object
Set objshell = CreateObject("wscript.shell")
Set DosExec = objshell.Exec("cmd.exe /c " & "net use M: " & createPath)
Set DosExec = Nothing
Set objshell = Nothing