Question

Vista and writing a blank file

Asked by: wildzero

Hi there,

I got an application which tries to save a text file to the users desktop.
XP this works fine, but Vista I get a blank file.
After searching google I know that this is a permissions issue, but why can't the user write to there own desktop? Or My Documents.

Frustrating! I even wrapped it in try finally, but there is no error message/exception. It just fails to write anything other then blank file.

Built with D2007

If SaveDialog1.Execute then
begin
  sl := TStringList.create;
  sl.add('hello');
  sl.SaveToFile(SaveDialog1.FileName);
  sl.Free;
end;

                                  
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Asked On
2008-12-28 at 11:39:44ID24012037
Tags

blank file

,

vista

,

permissions

Topic

Delphi Programming

Participating Experts
2
Points
0
Comments
7

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Answers

 

by: MerijnBPosted on 2008-12-29 at 01:23:10ID: 23254572

> but why can't the user write to there own desktop? Or My Documents.

as far as MS is concerned you could be a virus! lol

anyway, welcome to UAC I guess.

 

by: wildzeroPosted on 2008-12-30 at 10:41:50ID: 23264745

So, how can I work around this issue?

 

by: JohnjcesPosted on 2009-01-02 at 08:47:26ID: 23280562

1). You can turn UAC off in Vista.

2). You can add a proper manifest to your Delphi projects for Vista (search EE for Vista Manifest), that requests admin privileges. This will request your user always to say use and enter an administrator password.

3)... and there is not much else you can do to get around Vista's User Access Control!

John

 

by: wildzeroPosted on 2009-01-10 at 14:12:09ID: 23345552

So.. your telling me for my program to save a text file to the users desktop / my documents folder it needs an admin password?

How does Word / notepad do it.

 

by: wildzeroPosted on 2009-02-04 at 01:30:10ID: 23546166

Right figured out the solution finally.

It seems that with vista and dialogs and listviews.

When the user clicked Save it would fire up a TSaveDialog, then it would try and see which of the two listviews had focus and it would save that list.

However in vista, once the dialog was poped and closed the listview would loose focus. To get around this I would have to build the content BEFORE the dialog was opened.

before and after summary code below

(I don't have the code infront of me, it's either isFocused or has Focus or just Focused, it's a standard property of the listview)

begin
  if SaveDialog.execute then
  begin
    if Listview1.IsFocused then
    { generate content into str variable }
    
    if Listview2.IsFocused then
    { generate this content in str variable }
 
    Save content to SaveDialog.FileName;
  end;
end;
 
to make it work I had to...
 
begin
  if Listview1.IsFocused then
  { generate content into str variable }
    
  if Listview2.IsFocused then
  { generate this content in str variable }
 
  if SaveDialog.execute then
  begin
    Save content to SaveDialog.FileName;
  end;
end;
                                              
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by: MerijnBPosted on 2009-02-04 at 01:31:30ID: 23546177

Probably HasFocus

Good thing you found it!

 

by: MerijnBPosted on 2009-02-04 at 01:32:05ID: 23546183

Oops, that is Focused

20120131-EE-VQP-002

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