DeleteEntries or a possibility to overwrite

[Manuel]

Hi,
my app has to modify an archive, if i add a file (via ZipFromStream) which is allready existing in the archive,
it becomes duplicated, on the second run i got an error.
Is there a way to overwrite files in the archive?
If i delete the existing file in the archive first(via FileList and DeleteEntries) it lasts a very long time(about 1-2sec! for a few kb file in an small archive with 20 files,or so).
Is there a faster way??

thanks,
Manuel

[Manuel]

Why does this gave an "duplicate object index" exception??
...
filename:='blah/blupp.txt';
for i:=1 to 3 do
begin
zip.ClearZip;
zip.ZipName:='c:\test.zip';
zip.ZipFromStream(memstream,filename);
zip.SaveModifiedZipFile;
end;

if filename doesn't contain subdirectories
(eg. filename:='blupp.txt') it works.
I'am too stupid, or is that a bug???

[Kevin]

Manuel,

First, you don't need to call SaveModifiedZipFile, so you can remove that. That is only needed when you change something that does not require zipping, like when you change a filename or pathname or something like that.

Second, you probably want to set StorePaths := True. I think that MIGHT fix your problem. Let me know.

Kevin

[Manuel]

hi,

nope, StorePath is set.
(in fact, despite setting StorePath to false creates
a directory in the archive using ZipFromStream/Buffer)
files become duplicated (why does TSortedObjectList.Insert() handle the first duplicated file wrong (DupIgnore) ?)
if 2 duplicated files are allready in the archive then the duplicate object index exception occures..
(if there are 2 same files in the zip, winrar says the archive is
destroyed...)

[Kevin]

Instead of forward slashes use backslashes. That is instead of 'blah/blupp.txt' try 'blah\blupp.txt'.

Kevin