VB自带的标准对话框控件好像不能同时选择文件夹和文件(只能返回文件,而文件夹被忽略),有没有类似这样的控件呢?
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hWndOwner As Long
pIDLRoot As Long
pszDisplayName As String
lpszTitle As String
ulFlags As Long
lpfnCallback As Long
lParam As Long
iImage As Long
End Type Public Const BIF_RETURNONLYFSDIRS = &H1
Public Const BIF_DONTGOBELOWDOMAIN = &H2
Public Const BIF_STATUSTEXT = &H4
Public Const BIF_RETURNFSANCESTORS = &H8
Public Const BIF_EDITBOX = &H10
Public Const BIF_VALIDATE = &H20
Public Const BIF_NEWDIALOGSTYLE = &H40
Public Const BIF_USENEWUI = (BIF_NEWDIALOGSTYLE Or BIF_EDITBOX)
Public Const BIF_BROWSEINCLUDEURLS = &H80
Public Const BIF_UAHINT = &H100
Public Const BIF_NONEWFOLDERBUTTON = &H200
Public Const BIF_NOTRANSLATETARGETS = &H400
Public Const BIF_BROWSEFORCOMPUTER = &H1000
Public Const BIF_BROWSEFORPRINTER = &H2000
Public Const BIF_BROWSEINCLUDEFILES = &H4000
Public Const BIF_SHAREABLE = &H8000
Private Const MAX_PATH = 260
Private Const WM_USER = &H400
Private Const BFFM_INITIALIZED = 1
Private Const BFFM_SELCHANGED = 2
Private Const BFFM_SETSTATUSTEXT = (WM_USER + 100)
Private Const BFFM_SETSELECTION = (WM_USER + 102) Public Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" (ByVal pidl As Long, ByVal pszPath As String) As Long
Public Declare Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" (lpBrowseInfo As BrowseInfo) As Long
Public Declare Sub CoTaskMemFree Lib "ole32.dll" (ByVal pv As Long)
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As String) As Long Private mstrSTARTFOLDER As String
Public Function GetFolder(ByVal hWndModal As Long, Optional StartFolder As String = "", Optional Title As String = "Please select a folder:", _
Optional IncludeFiles As Boolean = False, Optional IncludeNewFolderButton As Boolean = False) As String
Dim bInf As BrowseInfo
Dim RetVal As Long
Dim PathID As Long
Dim RetPath As String
Dim Offset As Integer
'Set the properties of the folder dialog
bInf.hWndOwner = hWndModal
bInf.pIDLRoot = 0
bInf.lpszTitle = Title
bInf.ulFlags = BIF_RETURNONLYFSDIRS Or BIF_STATUSTEXT
If IncludeFiles Then bInf.ulFlags = bInf.ulFlags Or BIF_BROWSEINCLUDEFILES
If IncludeNewFolderButton Then bInf.ulFlags = bInf.ulFlags Or BIF_NEWDIALOGSTYLE
If StartFolder <> "" Then
mstrSTARTFOLDER = StartFolder & vbNullChar
bInf.lpfnCallback = GetAddressofFunction(AddressOf BrowseCallbackProc) 'get address of function.
End If
'Show the Browse For Folder dialog
PathID = SHBrowseForFolder(bInf)
RetPath = Space$(512)
RetVal = SHGetPathFromIDList(ByVal PathID, ByVal RetPath)
If RetVal Then
'Trim off the null chars ending the path
'and display the returned folder
Offset = InStr(RetPath, Chr$(0))
GetFolder = Left$(RetPath, Offset - 1)
'Free memory allocated for PIDL
CoTaskMemFree PathID
Else
GetFolder = ""
End If
End Function
Private Function BrowseCallbackProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal lp As Long, ByVal pData As Long) As Long
On Error Resume Next
Dim lpIDList As Long
Dim ret As Long
Dim sBuffer As String
Select Case uMsg
Case BFFM_INITIALIZED
Call SendMessage(hWnd, BFFM_SETSELECTION, 1, mstrSTARTFOLDER)
Case BFFM_SELCHANGED
sBuffer = Space(MAX_PATH)
ret = SHGetPathFromIDList(lp, sBuffer)
If ret = 1 Then
Call SendMessage(hWnd, BFFM_SETSTATUSTEXT, 0, sBuffer)
End If
End Select
BrowseCallbackProc = 0
End Function
Private Function GetAddressofFunction(add As Long) As Long
GetAddressofFunction = add
End Function
使用BIF_BROWSEINCLUDEFILES风格时,SHBrowseForFolder允许选择文件,SHBrowseForFolder本来就是选择目录的
http://visualbasicforum.com/printthread.php?t=46034
二、可以用通用对话框选择文件夹,只不过得写回调函数来扩展通用对话框的功能,而且牵涉到PIDL等Shell API概念。虽然代码较少,但技术难度很高上面rainstormmaster(暴风雨 v2.0)贴的那地址就用的是方法二
http://visualbasicforum.com/printthread.php?t=46034