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OPENFILENAME A P I. User cancels ?
How can I take an action (Example: Display a measssge box ), if the user
clicks Cancel in the Open Dialog. I got this API to work, but I know very little about how to manipulate it. Some sample code and an indication of where to place ithe code would be very appreciated. As is stands now, when the user clicks cancel, the return value is the first file in My Documents. I would like have it return nothing if the user clicks cancel, then display a message box. Here is API as I am currently using it: '================================ Private 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 Private Declare Function aht_apiGetOpenFileName Lib "comdlg32.dll" _ Alias "GetOpenFileNameA" (OFN As tagOPENFILENAME) As Boolean Private Declare Function aht_apiGetSaveFileName Lib "comdlg32.dll" _ Alias "GetSaveFileNameA" (OFN As tagOPENFILENAME) As Boolean Private Declare Function CommDlgExtendedError Lib "comdlg32.dll" () As Long Const ahtOFN_READONLY = &H1 Const ahtOFN_OVERWRITEPROMPT = &H2 Const ahtOFN_HIDEREADONLY = &H4 Const ahtOFN_NOCHANGEDIR = &H8 Const ahtOFN_SHOWHELP = &H10 Const CSIDL_DESKTOPDIRECTORY = &H10 ' You won't use these. ' Const ahtOFN_ENABLEHOOK = &H20 ' Const ahtOFN_ENABLETEMPLATE = &H40 ' Const ahtOFN_ENABLETEMPLATEHANDLE = &H80 Const ahtOFN_NOVALIDATE = &H100 Const ahtOFN_ALLOWMULTISELECT = &H200 Const ahtOFN_EXTENSIONDIFFERENT = &H400 Const ahtOFN_PATHMUSTEXIST = &H800 Const ahtOFN_FILEMUSTEXIST = &H1000 Const ahtOFN_CREATEPROMPT = &H2000 Const ahtOFN_SHAREAWARE = &H4000 Const ahtOFN_NOREADONLYRETURN = &H8000 Const ahtOFN_NOTESTFILECREATE = &H10000 Const ahtOFN_NONETWORKBUTTON = &H20000 Const ahtOFN_NOLONGNAMES = &H40000 ' New for Windows 95 Const ahtOFN_EXPLORER = &H80000 Const ahtOFN_NODEREFERENCELINKS = &H100000 Const ahtOFN_LONGNAMES = &H200000 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) Else '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 Function OpenDLG() Dim strFilter As String Dim lngFlags As Long Dim strFileNameOnly As String strFilter = ahtAddFilterItem(strFilter, "Excel Files (*.XLS)", "*.XLS") ' "C:\" 'CSIDL_DESKTOPDIRECTORY 'Environ("UserProfile") & "\Desktop" 'The full path is placed in Module level variable so the full path can be passed to the 'Excel automation procedure and the filename only to the text on the form strFullPathOfExcelFile = ahtCommonFileOpenSave(InitialDir:=Environ("UserPro file") & "\Desktop", _ Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _ DialogTitle:="Select an Excel file and click 'Open'") ' Since you passed in a variable for lngFlags, ' the function places the output flags value in the variable. 'Debug.Print Hex(lngFlags) 'These are the text boxes on the form strFileNameOnly = RturnFileName(strFullPathOfExcelFile) Me.txtFileName = strFileNameOnly Me.txtOutPutFileName = left(strFileNameOnly, Len(strFileNameOnly) - 4) & "(CONSLD).XLS" End Function '************** Code End ***************** |
#2
Posted to microsoft.public.excel.programming
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OPENFILENAME A P I. User cancels ?
You will find things much simpler if you use Excel's GetOpenFileName method:
Sub AAA() Dim FName As Variant FName = Application.GetOpenFilename(filefilter:="Excel Files, *.xl*") If FName = False Then MsgBox "No file selected" Else MsgBox "File: " & FName End If End Sub The variable FName will be a Boolean False if no file was selected (user cancels) or a String containing the fully qualified file name if the user selectes a file. Note that GetOpenFilename does *not* actually open the file -- it simply returns the name of the selected file. -- Cordially, Chip Pearson Microsoft MVP - Excel, 10 Years Pearson Software Consulting www.cpearson.com (email on the web site) "DZ" wrote in message ... How can I take an action (Example: Display a measssge box ), if the user clicks Cancel in the Open Dialog. I got this API to work, but I know very little about how to manipulate it. Some sample code and an indication of where to place ithe code would be very appreciated. As is stands now, when the user clicks cancel, the return value is the first file in My Documents. I would like have it return nothing if the user clicks cancel, then display a message box. Here is API as I am currently using it: '================================ Private 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 Private Declare Function aht_apiGetOpenFileName Lib "comdlg32.dll" _ Alias "GetOpenFileNameA" (OFN As tagOPENFILENAME) As Boolean Private Declare Function aht_apiGetSaveFileName Lib "comdlg32.dll" _ Alias "GetSaveFileNameA" (OFN As tagOPENFILENAME) As Boolean Private Declare Function CommDlgExtendedError Lib "comdlg32.dll" () As Long Const ahtOFN_READONLY = &H1 Const ahtOFN_OVERWRITEPROMPT = &H2 Const ahtOFN_HIDEREADONLY = &H4 Const ahtOFN_NOCHANGEDIR = &H8 Const ahtOFN_SHOWHELP = &H10 Const CSIDL_DESKTOPDIRECTORY = &H10 ' You won't use these. ' Const ahtOFN_ENABLEHOOK = &H20 ' Const ahtOFN_ENABLETEMPLATE = &H40 ' Const ahtOFN_ENABLETEMPLATEHANDLE = &H80 Const ahtOFN_NOVALIDATE = &H100 Const ahtOFN_ALLOWMULTISELECT = &H200 Const ahtOFN_EXTENSIONDIFFERENT = &H400 Const ahtOFN_PATHMUSTEXIST = &H800 Const ahtOFN_FILEMUSTEXIST = &H1000 Const ahtOFN_CREATEPROMPT = &H2000 Const ahtOFN_SHAREAWARE = &H4000 Const ahtOFN_NOREADONLYRETURN = &H8000 Const ahtOFN_NOTESTFILECREATE = &H10000 Const ahtOFN_NONETWORKBUTTON = &H20000 Const ahtOFN_NOLONGNAMES = &H40000 ' New for Windows 95 Const ahtOFN_EXPLORER = &H80000 Const ahtOFN_NODEREFERENCELINKS = &H100000 Const ahtOFN_LONGNAMES = &H200000 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) Else '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 Function OpenDLG() Dim strFilter As String Dim lngFlags As Long Dim strFileNameOnly As String strFilter = ahtAddFilterItem(strFilter, "Excel Files (*.XLS)", "*.XLS") ' "C:\" 'CSIDL_DESKTOPDIRECTORY 'Environ("UserProfile") & "\Desktop" 'The full path is placed in Module level variable so the full path can be passed to the 'Excel automation procedure and the filename only to the text on the form strFullPathOfExcelFile = ahtCommonFileOpenSave(InitialDir:=Environ("UserPro file") & "\Desktop", _ Filter:=strFilter, FilterIndex:=3, Flags:=lngFlags, _ DialogTitle:="Select an Excel file and click 'Open'") ' Since you passed in a variable for lngFlags, ' the function places the output flags value in the variable. 'Debug.Print Hex(lngFlags) 'These are the text boxes on the form strFileNameOnly = RturnFileName(strFullPathOfExcelFile) Me.txtFileName = strFileNameOnly Me.txtOutPutFileName = left(strFileNameOnly, Len(strFileNameOnly) - 4) & "(CONSLD).XLS" End Function '************** Code End ***************** |
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