I have a simple function:
function CopyDir(const fromDir, toDir: string): Boolean;
var
fos: TSHFileOpStruct;
begin
ZeroMemory(#fos, SizeOf(fos));
with fos do
begin
wFunc := FO_COPY;
fFlags := FOF_FILESONLY;
pFrom := PChar(fromDir + #0);
pTo := PChar(toDir)
end;
Result := (0 = ShFileOperation(fos));
end;
When I copy, a confirmation window pops up saying that a file already exists, asking if it should be overwritten.
I would like to avoid this popup and overwrite everything without confirmation.
Add flag FOF_NOCONFIRMATION to eliminate alerts
Related
When I call this File dialog it displays a nice modern dialog with
OPEN + OPEN AS READONLY buttons.
How can I remove the OPEN AS READ-ONLY button feature?
OpenSaveFileDialog(editform,'','my|*.my','','Open my',FilSelez,True,False,True,True)
function OpenSaveFileDialog( Parent: TWinControl;
const DefExt,Filter,InitialDir,Title: string;
var FileName: string;
MustExist,OverwritePrompt,NoChangeDir,DoOpen: Boolean): Boolean;
var ofn: TOpenFileName;
szFile: array[0..MAX_PATH] of Char;
begin
Result := False;
FillChar(ofn, SizeOf(TOpenFileName), 0);
with ofn do
begin
lStructSize := SizeOf(TOpenFileName);
hwndOwner := Parent.Handle;
lpstrFile := szFile;
nMaxFile := SizeOf(szFile);
if (Title <> '') then
lpstrTitle := PChar(Title);
if (InitialDir <> '') then
lpstrInitialDir := PChar(InitialDir);
StrPCopy(lpstrFile, FileName);
lpstrFilter := PChar(StringReplace(Filter, '|', #0,[rfReplaceAll, rfIgnoreCase])+#0#0);
if DefExt <> '' then
lpstrDefExt := PChar(DefExt);
end;
if MustExist then
ofn.Flags := ofn.Flags or OFN_FILEMUSTEXIST;
if OverwritePrompt then
ofn.Flags := ofn.Flags or OFN_OVERWRITEPROMPT;
if NoChangeDir then
ofn.Flags := ofn.Flags or OFN_NOCHANGEDIR;
if DoOpen
then begin
if GetOpenFileName(ofn) then
begin
Result := True;
FileName := StrPas(szFile);
end;
end
else begin
if GetSaveFileName(ofn) then
begin
Result := True;
FileName := StrPas(szFile);
end;
end;
end;
Every time you use a new API, you always read its full documentation.
In this case, you go to the docs for the GetOpenFileName function, and you find that it has a single parameter, a structure of type OPENFILENAME. Hence, you go to the documentation for this structure.
At this page, you press Ctrl+F in your web browser, and search for "read only" to quickly find this passage:
Flags
A set of bit flags you can use to initialize the dialog box. When the dialog box returns, it sets these flags to indicate the user's input. This member can be a combination of the following flags.
[...]
OFN_HIDEREADONLY
0x00000004
Hides the Read Only check box.
Hence, you realise that you only need to add this flag:
ofn.Flags := ofn.Flags or OFN_HIDEREADONLY;
I would like to modernize the GUI of my Delphi 7 App, I have already .manifest file and it looks quite good, but the Fileopen dialogs are terrible. How the make them modern?
I am using this code at the moment.
What would it require to use e.g. IFileOpenDialog instead, how to compile the header for that, or any tweaks to dialogs.pas ?
FileOpenDialog := TOpenDialog.create(parent);
FileOpenDialog.DefaultExt := '*.x';
FileOpenDialog.Filter := 'my|*.x|Text File (CSV)|*.csv';
FileOpenDialog.options := [ofHideReadOnly,ofFileMustExist ,ofNoChangeDir,ofPathMustExist ];
if FileOpenDialog.Execute then begin
// do my tricks with FileOpenDialog.filename
FormUpdate;
end;
The following example code of IFileDialog cannot be compiled with D7:
var
FolderDialog : IFileDialog;
hr: HRESULT;
IResult: IShellItem;
FileName: PChar;
Settings: DWORD;
begin
if Win32MajorVersion >= 6 then
begin
hr := CoCreateInstance(CLSID_FileOpenDialog,
nil,
CLSCTX_INPROC_SERVER,
IFileDialog,
FolderDialog);
if hr = S_OK then
begin
FolderDialog.SetOkButtonLabel(PChar('Select'));
FolderDialog.SetTitle(PChar('Select a Directory'));
hr := FolderDialog.Show(Handle);
if hr = S_OK then
begin
hr := FolderDialog.GetResult(IResult);
if hr = S_OK then
begin
IResult.GetDisplayName(SIGDN_FILESYSPATH,FileName);
ConfigPathEdit.Text := FileName;
end;
end;
end;
end;
I used this one, I tested it with D7.
// uses commdlg
function OpenSaveFileDialog( Parent: TWinControl;
const DefExt,Filter,InitialDir,Title: string;
var FileName: string;
MustExist,OverwritePrompt,NoChangeDir,DoOpen: Boolean): Boolean;
var ofn: TOpenFileName;
szFile: array[0..MAX_PATH] of Char;
begin
Result := False;
FillChar(ofn, SizeOf(TOpenFileName), 0);
with ofn do
begin
lStructSize := SizeOf(TOpenFileName);
hwndOwner := Parent.Handle;
lpstrFile := szFile;
nMaxFile := SizeOf(szFile);
if (Title <> '') then
lpstrTitle := PChar(Title);
if (InitialDir <> '') then
lpstrInitialDir := PChar(InitialDir);
StrPCopy(lpstrFile, FileName);
lpstrFilter := PChar(StringReplace(Filter, '|', #0,[rfReplaceAll, rfIgnoreCase])+#0#0);
if DefExt <> '' then
lpstrDefExt := PChar(DefExt);
end;
if MustExist then
ofn.Flags := ofn.Flags or OFN_FILEMUSTEXIST;
if OverwritePrompt then
ofn.Flags := ofn.Flags or OFN_OVERWRITEPROMPT;
if NoChangeDir then
ofn.Flags := ofn.Flags or OFN_NOCHANGEDIR;
if DoOpen
then begin
if GetOpenFileName(ofn) then
begin
Result := True;
FileName := StrPas(szFile);
end;
end
else begin
if GetSaveFileName(ofn) then
begin
Result := True;
FileName := StrPas(szFile);
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
VAR FilSelez : String;
begin
If OpenSaveFileDialog(Form1,'','*.*','c:\windows','',FilSelez,False,False,True,True) Then
Edit1.Text := FilSelez;
end;
Instead of using the IFileDialog interface you can also just modify Delphi's 7 Dialogs.pas file to display the "modern" dialogs.
First make a backup copy of the Dialogs.pas file in the Source\VCL folder under the Delphi installation directory. Then search the file for the term OFN_ENABLEHOOK. The complete line should be Flags := OFN_ENABLEHOOK;. Comment out the line. Add a new line Flags := 0; directly below.
Now search for the term OFN_ENABLETEMPLATE. Two lines above this should be an if Template <> nil then statement. Comment out this statement and all following ones up to and including hWndOwner := Application.Handle; and add the line hWndOwner := Screen.ActiveForm.Handle;.
Now make sure to replace the precompiled units Dialogs.dcu in the Lib and SLib directory under the Delphi installation directory with newly compiled Dialogs.dcu containing the changes. In the Lib directory you store a version without debug information, while the SLib directory contains a version with debug information. Make backup copies of the files before replacing them.
Please take note that the instructions given above only apply to Delphi 7. Furthermore, the code disables event handling for the common dialog components.
Any ideas why this doesn't work? No errors, my text files just don't copy.
procedure TForm1.CopyFiles(Source, Target: string);
var
FO: TShFileOpStruct;
begin
FillChar(FO,SizeOf(FO),#0);
FO.Wnd := Form1.Handle;
FO.wFunc := FO_COPY;
FO.pFrom := PChar(Source);
FO.pTo := PChar(Target);
ShFileOperation(FO);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
CopyFiles('c:\test\*.txt','c:\test2\');
end;
You have no errors because you don't check the return value of the call to SHFileOperation. There could be an error, but you cannot know about it because you neglect to check for it.
The other problem you have is that you failed to double null terminate the strings, as stated in the documentation. So that like so:
FO.pFrom := PChar(Source + #0);
FO.pTo := PChar(Target + #0);
Given these mistakes that you have made, I suggest that you have another close read of the documentation.
I'm using Windows API to recursively delete many files and folders. I'm using it without a UI and suppressing errors. The problem is, it completely fails if one of those files is in use. I expect that possibility, and want this to continue anyway, skipping any such cases. The one file which fails is actually the same EXE which is calling this delete command (which will be deleted after it's all done anyway.
Here's what I'm doing now:
procedure DeleteDirectory(const DirName: string);
var
FileOp: TSHFileOpStruct;
begin
FillChar(FileOp, SizeOf(FileOp), 0);
FileOp.wFunc := FO_DELETE;
FileOp.pFrom := PChar(DirName+#0);//double zero-terminated
FileOp.fFlags := FOF_SILENT or FOF_NOERRORUI or FOF_NOCONFIRMATION;
SHFileOperation(FileOp);
end;
How can I make this skip any event of a file being in use? I looked at the documentation but can't find anything that can do this.
Here is just an idea you can implement in your function to validate if there is any file in use:
function IsFileInUse(FileName: TFileName): Boolean;
var
HFileRes: HFILE;
begin
Result := False;
if not FileExists(FileName) then
Exit;
HFileRes := CreateFile(PChar(FileName),
GENERIC_READ or GENERIC_WRITE,
0,
nil,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
Result := (HFileRes = INVALID_HANDLE_VALUE);
if not Result then
CloseHandle(HFileRes);
end;
Maybe it can help you.
Why don't you try this:
procedure DeleteFiles(const DirName: String);
var
SR: TSearchRec;
i: Integer;
begin
//get all files in directory
i := FindFirst(DirName +'\*.*', faAnyFile, SR);
while i = 0 do
begin
if (SR.Attr and faDirectory) <> faDirectory then
DeleteFile(DirName +'\'+ SR.Name);
i := FindNext(SR);
end;
FindClose(SR);
end;
It's another way to do it.
I cannot delete files to Recycle Bin.
VAR SHFileOpStruct: TSHFileOpStruct;
begin
with SHFileOpStruct do
begin
wnd := Handle;
wFunc := FO_DELETE;
pFrom := PChar(FileName);
fFlags:= 0;
pTo := NIL;
hNameMappings:= NIL;
lpszProgressTitle:= NIL;
end;
Result:= SHFileOperation(SHFileOpStruct);
end;
I can delete files in this format: '1.xyz' but not in this format '12.xyz' (file name is longer than 1 character).
According to the documentation of SHFileOperation you should not use GetLastError to see if the operation succeeds. Check the Result of the function and use the documentation to figure out the error it returns. That should give you a better clue what the problem is.
EDIT:
Best guess from reading the documentation:
pFrom
Although this member is declared as a
single null-terminated string, it is
actually a buffer that can hold
multiple null-delimited file names.
Each file name is terminated by a
single NULL character. The last file
name is terminated with a double NULL
character ("\0\0") to indicate the end
of the buffer
So you should make sure pFrom is ended with a double 0. Try the following
pFrom := PChar(FileName + #0);
Also, what Delphi version are you using?
EDIT2:
Also make sure the structure is properly initialized to 0. Uncomment the FillChar
This works for me:
function DeleteToRecycleBin(WindowHandle: HWND; Filename: string; Confirm: Boolean): Boolean;
var
SH: TSHFILEOPSTRUCT;
begin
FillChar(SH, SizeOf(SH), 0);
with SH do
begin
Wnd := WindowHandle;
wFunc := FO_DELETE;
pFrom := PChar(Filename + #0);
fFlags := FOF_SILENT or FOF_ALLOWUNDO;
if not Confirm then
begin
fFlags := fFlags or FOF_NOCONFIRMATION
end;
end;
Result := SHFileOperation(SH) = 0;
end;
You may want to set the fFlags := FOF_SILENT + FOF_ALLOWUNDO + FOF_NOCONFIRMATION