Re: FileStreams - C# Discussion Boards

22-Jun-07 9:11

Now that you've mentioned it, I have an irrational need for indexers to be passed as an out parameter. Gahhhhhh.

Please visit http://www.readytogiveup.com/ and do something special today.
Deja View - the feeling that you've seen this post before.

FileStreams

RussBus22-Jun-07 5:08

22-Jun-07 5:08

I am having a problem with a File Stream. I am using the following code:

//Get .RJB file
m_oZipFile = new ZipFile(new FileStream(l_szLocation, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite));

I hold onto the m_oZipFile until I close the XML editor (that I am building), I am closing the Stream as follows.

m_oZipFile.Close();

When I close the program I am not getting the File write access back. For example, if I have 2 of the XML editors open, once I close the one with Write access to the file, the other one does not gain the write access.

RussBus22-Jun-07 5:14

22-Jun-07 5:14

I have also tried doing the following:

m_oFileStreamTest = new FileStream(l_szLocation, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);

m_oZipFile = new ZipFile(m_oFileStreamTest);

then to close

m_oZipFile.Close();
m_oFileStreamTest.Close();
m_oFileStreamTest = null;
m_oZipFile = null;

Luc Pattyn22-Jun-07 5:28

Luc Pattyn

22-Jun-07 5:28

Hi,

you most close things in reverse order from opening them.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

RussBus22-Jun-07 5:36

22-Jun-07 5:36

Is that not what I have done?

Luc Pattyn22-Jun-07 5:38

Luc Pattyn

22-Jun-07 5:38

etc.

Luc Pattyn

[My Articles] [Forum Guidelines]

RussBus22-Jun-07 5:41

22-Jun-07 5:41

I have close things in the reverse order and i still get the same error. That being that write access is not given to the next open file.

Luc Pattyn22-Jun-07 6:53

Luc Pattyn

22-Jun-07 6:53

These are some of the questions that need answered in order to debug:

What is ZipFile ?
if your class, show code; at the least the constructor, the Close method and any methods they may call. Provide proof that Close run up to its end.
if ZipFile is not your class, where did you get it ?

Does the problem exist outside your app:
- can you rename the file with Windows Explorer ?
- Can you delete the file ?

Try another file name. Does it work the first time ? and the second time ?

Any chance your previous EXE is still running (e.g. because one of the threads
is still running while not declared a background thread) ?

Any chance your app has another stream open on the same file ?

Why do you use FileMode.Open instead of Create ??
And why FileAccess.ReadWrite ? are you first reading then writing (hence
multiple streams...) ?? if so did you close all streams before closing the file ?

And why FileShare.ReadWrite ???? I must strongly advice against it. If you do
not absolutely need this, use None !

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Scott Dorman22-Jun-07 7:17

Scott Dorman

22-Jun-07 7:17

I think what Luc is trying to say is that you need to close the m_oFileStreamTest before closing the m_oZipFile.

-----------------------------
In just two days, tomorrow will be yesterday.

Database Architecture:Record Locking

Scott Dorman22-Jun-07 7:19

Scott Dorman

22-Jun-07 7:19

You might want to try wrapping things in a using statement to ensure that the streams are being closed properly. It should look something like this:

using (FileStream m_oFileStreamTest = new FileStream(l_szLocation, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite))
{
   using (ZipFile m_oZipFile = new ZipFile(m_oFileStreamTest))
   {
      // Whatever code you have to write to the file.
   }
}

-----------------------------
In just two days, tomorrow will be yesterday.

xbiplav22-Jun-07 5:05

xbiplav

22-Jun-07 5:05

I have a central database in a server computer(In sql express 2005).
Two or more computers can connect to the central database.When a terminal computer is doing some operation on some data, how can i ensure that the other terminal
in the same network doesnot change the data at the very same moment?

Help appreciated both in C# or VB.Net

X

Re: Database Architecture:Record Locking

originSH22-Jun-07 5:14

originSH

22-Jun-07 5:14

Concurrency is quite a big issue Wink | ;)

Heres 2 links to relivent discussions on the subject. For more information do searches for optimistic and pessimistic concurrency.

http://www.microsoft.com/technet/prodtechnol/sql/2005/cncrrncy.mspx[^]

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=839625&SiteID=1[^]

I would like to have an extra algorithm about slide puzzle game [modified]

john84vn22-Jun-07 4:45

john84vn

22-Jun-07 4:45

I have read a demo about the Slide puzzle game.
http://www.codeproject.com/csharp/slidingpuzzle.asp[^]
It's great. But i need to know more. I would like to cut the image to any sharp, such as circle, wheel... not only square.
How can i do that?
More, how can i cut the image to several pieces with any sharp and then collect and join them into the original image by drag and drop them(a game call juzzle)?
Thanks in advance
Phong Tran

-- modified at 10:50 Friday 22nd June, 2007

JohnJone

Read entire data in data base table

kaushal65422-Jun-07 3:04

kaushal654

22-Jun-07 3:04

I want to read entire data in particular table into my variables.that can be an array. In sametime I want to sort those value. I u know some thing about this pls reply me. That is so urgent, pls.... pls.... WTF | :WTF:

Re: Read entire data in data base table

Colin Angus Mackay22-Jun-07 3:11

Colin Angus Mackay

22-Jun-07 3:11

kaushal654 wrote:
That is so urgent

Is it... There are so many people that say that their problem is urgent that I remain unconvinced.

kaushal654 wrote:
I want to read entire data in particular table into my variables.

What do you mean by that. What variables? What type of object are they?

kaushal654 wrote:
In sametime I want to sort those value.

How would you like them sorted?

So, what work have you done so far in this urgent matter? Why not show us your code and we can help you fix it up.

Upcoming events:
* Glasgow: Mock Objects, SQL Server CLR Integration, Reporting Services, db4o, Dependency Injection with Spring ...
* Reading: Developer Day 5

Ready to Give up - Your help will be much appreciated.

My website

I thought this was "so urgent"

Colin Angus Mackay22-Jun-07 4:21

Colin Angus Mackay

22-Jun-07 4:21

kaushal654 wrote:
That is so urgent, pls.... pls....

It's been over an hour since I requested that you clarify your question. It is genuinely was urgent you would have replied by now. So, I can only conclude that putting urgent in the message was a deception.

Pete O'Hanlon22-Jun-07 9:14

22-Jun-07 9:14

It obviously wasn't so urgent that he had to solve it before knocking off for the weekend.

Please visit http://www.readytogiveup.com/ and do something special today.
Deja View - the feeling that you've seen this post before.

Martin#22-Jun-07 9:18

Martin#

22-Jun-07 9:18

I would not be surprised to see same post on monday!

Again very URGENT, of course!

Not Active22-Jun-07 9:28

Not Active

22-Jun-07 9:28

No, by Monday it would be very, very urgent;P

only two letters away from being an asset

Pete O'Hanlon22-Jun-07 9:31

22-Jun-07 9:31

By that stage I expect it to be "Oh my god - we're doomed"!!!

Please visit http://www.readytogiveup.com/ and do something special today.
Deja View - the feeling that you've seen this post before.

Colin Angus Mackay22-Jun-07 9:37

Colin Angus Mackay

22-Jun-07 9:37

Pete O`Hanlon wrote:
By that stage I expect it to be "Oh my god - we're doomed"!!!

I just had the voice of Fraser from Dad's Army in my head when I read that.

Wuhrr doomed. Wuhrrr alllll doooommmmmmmed!

Pete O'Hanlon22-Jun-07 9:44