Passing Variables in File Open Dialogue Box 1

[Yardyy]

Hi, I have this snippet of code from

http://www.mvps.org/access/api/api0001.htm

This is just the snippet that i have used: Function TestIt()
Dim strFilter As String
Dim lngFlags As Long
strFilter = ahtAddFilterItem(strFilter, "Access Files (*.mda, *.mdb)", _
"*.MDA;*.MDB")
strFilter = ahtAddFilterItem(strFilter, "dBASE Files (*.dbf)", "*.DBF")
strFilter = ahtAddFilterItem(strFilter, "Text Files (*.txt)", "*.TXT")
strFilter = ahtAddFilterItem(strFilter, "All Files (*.*)", "*.*")
MsgBox "You selected: " & ahtCommonFileOpenSave(InitialDir:="C:\", _
Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _
DialogTitle:="Hello! Open Me!")
' Since you passed in a variable for lngFlags,
' the function places the output flags value in the variable.
Debug.Print Hex(lngFlags)
End Function


that allows me to open a file dialogue box to select a file, on the form i also have a text field, that i would like to get the path for the selected file.

I have the code on call testit() on the click event, which seems to be working fine, what i cannot work out is how to pass that value the path to the text field, which is a hyperlink. I think lngFlags has the value that i need, not sure though.

Any help most appreciated..



Many Thanks
Yurov Ardyy

 

[Remou]

If you wish to set the textbox to the result, instead of:
[tt] MsgBox "You selected: " & ahtCommonFileOpenSave(InitialDir:="C:\", _
Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _
DialogTitle:="Hello! Open Me!")[/tt]

you can say:

[tt]TestIt=ahtCommonFileOpenSave(InitialDir:="C:\", _
Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _
DialogTitle:="Hello! Open Me!")[/tt]

You need to add tests for Null and such like.

 

[Yardyy]

Tried that but i get an error saying :
ambigious name detected: ahtCommonFileOpenSave


Many Thanks
Yurov Ardyy

 

[Remou]

Please post the code you used. Also, check if you have pasted the code from the link into more than one module.

 

[Yardyy]

Ok here goes then ....
I have a module named Open_File_Dialogue with this as the contents:
'***************** Code Start **************
'This code was originally written by Ken Getz.
'It is not to be altered or distributed,
'except as part of an application.
'You are free to use it in any application,
'provided the copyright notice is left unchanged.
'
' Code courtesy of:
' Microsoft Access 95 How-To
' Ken Getz and Paul Litwin
' Waite Group Press, 1996

Type tagOPENFILENAME
lStructSize As Long
hwndOwner As Long
hInstance As Long
strFilter As String
strCustomFilter As String
nMaxCustFilter As Long
nFilterIndex As Long
strFile As String
nMaxFile As Long
strFileTitle As String
nMaxFileTitle As Long
strInitialDir As String
strTitle As String
Flags As Long
nFileOffset As Integer
nFileExtension As Integer
strDefExt As String
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type

Declare Function aht_apiGetOpenFileName Lib "comdlg32.dll" _
Alias "GetOpenFileNameA" (OFN As tagOPENFILENAME) As Boolean

Declare Function aht_apiGetSaveFileName Lib "comdlg32.dll" _
Alias "GetSaveFileNameA" (OFN As tagOPENFILENAME) As Boolean
Declare Function CommDlgExtendedError Lib "comdlg32.dll" () As Long

Global Const ahtOFN_READONLY = &H1
Global Const ahtOFN_OVERWRITEPROMPT = &H2
Global Const ahtOFN_HIDEREADONLY = &H4
Global Const ahtOFN_NOCHANGEDIR = &H8
Global Const ahtOFN_SHOWHELP = &H10
' You won't use these.
'Global Const ahtOFN_ENABLEHOOK = &H20
'Global Const ahtOFN_ENABLETEMPLATE = &H40
'Global Const ahtOFN_ENABLETEMPLATEHANDLE = &H80
Global Const ahtOFN_NOVALIDATE = &H100
Global Const ahtOFN_ALLOWMULTISELECT = &H200
Global Const ahtOFN_EXTENSIONDIFFERENT = &H400
Global Const ahtOFN_PATHMUSTEXIST = &H800
Global Const ahtOFN_FILEMUSTEXIST = &H1000
Global Const ahtOFN_CREATEPROMPT = &H2000
Global Const ahtOFN_SHAREAWARE = &H4000
Global Const ahtOFN_NOREADONLYRETURN = &H8000
Global Const ahtOFN_NOTESTFILECREATE = &H10000
Global Const ahtOFN_NONETWORKBUTTON = &H20000
Global Const ahtOFN_NOLONGNAMES = &H40000
' New for Windows 95
Global Const ahtOFN_EXPLORER = &H80000
Global Const ahtOFN_NODEREFERENCELINKS = &H100000
Global Const ahtOFN_LONGNAMES = &H200000

Function TestIt()
Dim strFilter As String
Dim lngFlags As Long
strFilter = ahtAddFilterItem(strFilter, "Access Files (*.mda, *.mdb)", _
"*.MDA;*.MDB")
strFilter = ahtAddFilterItem(strFilter, "dBASE Files (*.dbf)", "*.DBF")
strFilter = ahtAddFilterItem(strFilter, "Text Files (*.txt)", "*.TXT")
strFilter = ahtAddFilterItem(strFilter, "All Files (*.*)", "*.*")
MsgBox "You selected: " & ahtCommonFileOpenSave(InitialDir:="C:\", _
Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _
DialogTitle:="Hello! Open Me!")
' Since you passed in a variable for lngFlags,
' the function places the output flags value in the variable.
Debug.Print Hex(lngFlags)
End Function

Function GetOpenFile(Optional varDirectory As Variant, _
Optional varTitleForDialog As Variant) As Variant
' Here's an example that gets an Access database name.
Dim strFilter As String
Dim lngFlags As Long
Dim varFileName As Variant
' Specify that the chosen file must already exist,
' don't change directories when you're done
' Also, don't bother displaying
' the read-only box. It'll only confuse people.
lngFlags = ahtOFN_FILEMUSTEXIST Or _
ahtOFN_HIDEREADONLY Or ahtOFN_NOCHANGEDIR
If IsMissing(varDirectory) Then
varDirectory = ""
End If
If IsMissing(varTitleForDialog) Then
varTitleForDialog = ""
End If

' Define the filter string and allocate space in the "c"
' string Duplicate this line with changes as necessary for
' more file templates.
strFilter = ahtAddFilterItem(strFilter, _
"Access (*.mdb)", "*.MDB;*.MDA")
' Now actually call to get the file name.
varFileName = ahtCommonFileOpenSave( _
OpenFile:=True, _
InitialDir:=varDirectory, _
Filter:=strFilter, _
Flags:=lngFlags, _
DialogTitle:=varTitleForDialog)
If Not IsNull(varFileName) Then
varFileName = TrimNull(varFileName)
End If
GetOpenFile = varFileName
End Function

Function ahtCommonFileOpenSave( _
Optional ByRef Flags As Variant, _
Optional ByVal InitialDir As Variant, _
Optional ByVal Filter As Variant, _
Optional ByVal FilterIndex As Variant, _
Optional ByVal DefaultExt As Variant, _
Optional ByVal FileName As Variant, _
Optional ByVal DialogTitle As Variant, _
Optional ByVal hwnd As Variant, _
Optional ByVal OpenFile As Variant) As Variant
' This is the entry point you'll use to call the common
' file open/save dialog. The parameters are listed
' below, and all are optional.
'
' In:
' Flags: one or more of the ahtOFN_* constants, OR'd together.
' InitialDir: the directory in which to first look
' Filter: a set of file filters, set up by calling
' AddFilterItem. See examples.
' FilterIndex: 1-based integer indicating which filter
' set to use, by default (1 if unspecified)
' DefaultExt: Extension to use if the user doesn't enter one.
' Only useful on file saves.
' FileName: Default value for the file name text box.
' DialogTitle: Title for the dialog.
' hWnd: parent window handle
' OpenFile: Boolean(True=Open File/False=Save As)
' Out:
' Return Value: Either Null or the selected filename
Dim OFN As tagOPENFILENAME
Dim strFileName As String
Dim strFileTitle As String
Dim fResult As Boolean
' Give the dialog a caption title.
If IsMissing(InitialDir) Then InitialDir = CurDir
If IsMissing(Filter) Then Filter = ""
If IsMissing(FilterIndex) Then FilterIndex = 1
If IsMissing(Flags) Then Flags = 0&
If IsMissing(DefaultExt) Then DefaultExt = ""
If IsMissing(FileName) Then FileName = ""
If IsMissing(DialogTitle) Then DialogTitle = ""
If IsMissing(hwnd) Then hwnd = Application.hWndAccessApp
If IsMissing(OpenFile) Then OpenFile = True
' Allocate string space for the returned strings.
strFileName = Left(FileName & String(256, 0), 256)
strFileTitle = String(256, 0)
' Set up the data structure before you call the function
With OFN
.lStructSize = Len(OFN)
.hwndOwner = hwnd
.strFilter = Filter
.nFilterIndex = FilterIndex
.strFile = strFileName
.nMaxFile = Len(strFileName)
.strFileTitle = strFileTitle
.nMaxFileTitle = Len(strFileTitle)
.strTitle = DialogTitle
.Flags = Flags
.strDefExt = DefaultExt
.strInitialDir = InitialDir
' Didn't think most people would want to deal with
' these options.
.hInstance = 0
'.strCustomFilter = ""
'.nMaxCustFilter = 0
.lpfnHook = 0
'New for NT 4.0
.strCustomFilter = String(255, 0)
.nMaxCustFilter = 255
End With
' This will pass the desired data structure to the
' Windows API, which will in turn it uses to display
' the Open/Save As Dialog.
If OpenFile Then
fResult = aht_apiGetOpenFileName(OFN)
Else
fResult = aht_apiGetSaveFileName(OFN)
End If

' The function call filled in the strFileTitle member
' of the structure. You'll have to write special code
' to retrieve that if you're interested.
If fResult Then
' You might care to check the Flags member of the
' structure to get information about the chosen file.
' In this example, if you bothered to pass in a
' value for Flags, we'll fill it in with the outgoing
' Flags value.
If Not IsMissing(Flags) Then Flags = OFN.Flags
ahtCommonFileOpenSave = TrimNull(OFN.strFile)
Else
ahtCommonFileOpenSave = vbNullString
End If
End Function

Function ahtAddFilterItem(strFilter As String, _
strDescription As String, Optional varItem As Variant) As String
' Tack a new chunk onto the file filter.
' That is, take the old value, stick onto it the description,
' (like "Databases"), a null character, the skeleton
' (like "*.mdb;*.mda") and a final null character.

If IsMissing(varItem) Then varItem = "*.*"
ahtAddFilterItem = strFilter & _
strDescription & vbNullChar & _
varItem & vbNullChar
End Function

Private Function TrimNull(ByVal strItem As String) As String
Dim intPos As Integer
intPos = InStr(strItem, vbNullChar)
If intPos > 0 Then
TrimNull = Left(strItem, intPos - 1)
Else
TrimNull = strItem
End If
End Function
'************** Code End *****************



Then i have a form with a field called attachment with a hyperlink data type. A button on the form called command107, with this as the code beneath it:

Private Sub Command107_Click()
Call TestIt
Me.Attachement = lngFlags
End Sub

thats the only code that i have used here.

Many Thanks
Yurov Ardyy

 

[Remou]

Change TestIt (above) to this:

Function TestIt()
    Dim strFilter As String
    Dim lngFlags As Long
    strFilter = ahtAddFilterItem(strFilter, "Access Files (*.mda, *.mdb)", _
                    "*.MDA;*.MDB")
    strFilter = ahtAddFilterItem(strFilter, "dBASE Files (*.dbf)", "*.DBF")
    strFilter = ahtAddFilterItem(strFilter, "Text Files (*.txt)", "*.TXT")
    strFilter = ahtAddFilterItem(strFilter, "All Files (*.*)", "*.*")
    TestIt = ahtCommonFileOpenSave(InitialDir:="C:\", _
        Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _
        DialogTitle:="Hello! Open Me!")
    ' Since you passed in a variable for lngFlags,
    ' the function places the output flags value in the variable.
    'Debug.Print Hex(lngFlags)
End Function

Change the code on your form to:

Private Sub Command107_Click()
   Me.Attachement = TestIt
End Sub

 

[Yardyy]

Remou, thanks for that it works now, only thing is that when i click on the hyperlink it doesnt open the file, i tried it out with:

file:///C:\File.txt

and that opens the file, Am i doing something wrong, or is it something that i have not setup in the properties of the hyperlink.

Many Thanks
Yurov Ardyy

 

[Remou]

I greatly dislike hyperlink fields, preferring to use FollowHyperlink. You need two parts for a hyperlink field:

Part1#Hyperlink Address#

So:

[tt]txtFile=TestIt
Me.Attachement = txtFile & "#" & txtFile & "#"[/tt]


You may also wish to look up HyperlinkAddress.

 

[Yardyy]

Thanks for this again, I need to look into what makes a HyperlinkAddress better than the method that i am using, your expertise is greatly appreciated.

Many Thanks
Yurov Ardyy

 

[Remou]

Just to be clear, FollowHyperlink is the bit that I like, HyperlinkAddress is to do with setting up HyperLink fields.