Re: C# Threading - C# Discussion Boards

29-Sep-10 3:04

In order to be able to delete a file, everything that points to the file must have been disposed.
Candidates are: Image.FromFile, Image.FromStream, PictureBox.ImageLocation
The problem here is you have to do special things at the end of the PictureBox's life; if the image is used in more than one location in your code, it may be hard to correctly decide on its disposal.

There also is a different approach, where the problem is avoided beforehand, by copying the image; this is a schematic example:

Image image1=Image.FromFile(...);
Bitmap bitmap1=new Bitmap(image1);        // bitmap1 is unrelated to the file!
image1.Dispose();                         // now the file is deletable
PictureBox.Image=bitmap1;
...
myForm.Close();                           // will lead to PictureBox disposal
// bitmap1 will be garbage collected at some point, this does not affect the file

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

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C# Threading

Ramkithepower28-Sep-10 23:27

Ramkithepower

28-Sep-10 23:27

Hi ,

I am trying to create an application to extract some txt files from ZIP and then search the text files for a search string.

I have done two functions
1. That extracts the files
2. That searches through the files

This is my required program flow.

I need to threads to run here
The first thread should concentrate on searching the file, extracting them and add the extracted files's to a string array and the second thread to monitor that string array and search the newly added files for the search string.

Is this possible? I have done some coding for this. Will post it later in this message thread if required later.

Jack Sparrow
--------------------------------------
Defeat is not the worst of failures. Not to have tried is the true failure.

Re: C# Threading

Pete O'Hanlon28-Sep-10 23:38

28-Sep-10 23:38

Ramkithepower wrote:
Is this possible?

Yes - I'm not sure it's the best possible design, but it is possible. What you could do (if you are using .NET 3.5 or later) is use an ObservableCollection in the first thread which the second thread hooks into the event handlers for to see when items are added into that collection - then it can perform it's searching in response to the item changing.

Alternatively, and this is perhaps a better method, you could have your first thread implement an event handler that takes the contents of the file as a parameter (assuming you are just storing it as a big string here) and the second thread hooks into that event. Obviously, you'd fire off the event every time you added a file.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

file manager

kamila_me28-Sep-10 6:22

kamila_me

28-Sep-10 6:22

Help to create a simple file manager that can do following things:
- Browse the directories(forward and back functionality);
- Change the current driver(from C:\ to D:\ or to flash);
- Pre-view and edition of the file with the short-cut key(F4) –
only for txt files;
- The icon with functionality that allows the user show or hide
hidden/system files and folders; Confused | :confused:

PLEASE HELP Smile | :)

Re: file manager

Luc Pattyn28-Sep-10 6:35

to show checkBox 'true' using List View

28-Sep-10 6:35

You should read some CodeProject articles, maybe this one for starters: C# File Browser[^]

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

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annie_bel28-Sep-10 0:01

annie_bel

28-Sep-10 0:01

hi,

I am using ListView to display the records.
I have a column namely, 'module' contains record in following manner.

edit, delete

Actually i am adding this value through checkbox. when i select checkbox, the associated value ('edit') has been added in database, when i select another checkbox, the related value ('delete')has been added in the database. basically i can select two or three checkox, all concerned value has been added and seperated with 'comma' in same column.

My query is , I want to edit this data. when I select edit button, the value of the checkbox shows 'true'.
e.g. the 'edit' related checkbox shows 'tick' and so on.

thanx and regards,

Re: to show checkBox 'true' using List View

Michael Eber30-Sep-10 11:46

Michael Eber

30-Sep-10 11:46

This is the C# forum. You don't state what you are using this in.

Is it a web page, WPF, or Silverlight application? It makes a big deal as to how to do things based on where you display it.

How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

Duong Minh Hai27-Sep-10 23:30

Duong Minh Hai

27-Sep-10 23:30

This ICAO line retrevie from Passport, for example:

P<VNMLE<<HUY<HOP<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
B2497277<3VNM9007219M18082251010666632<<<<<58
Now, I want to Name, Sexual, Passport No,...from above line.
Please help me,

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

Pete O'Hanlon27-Sep-10 23:50

27-Sep-10 23:50

Take a look at the Passport section here[^] for details of the format. You could have found this information yourself easily enough, by using Google to search for ICAO line passport - that's what I did and the first link took me to this page.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

AspDotNetDev28-Sep-10 10:26

AspDotNetDev

28-Sep-10 10:26

Barry White will get you sexual.

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Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

Pete O'Hanlon28-Sep-10 10:35

28-Sep-10 10:35

Noooooo - that's an image I don't want in my mind.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

Luc Pattyn28-Sep-10 10:39

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

28-Sep-10 10:39

yeah, I had been wondering how long it would take for a little quip to appear here, and I was pretty disappointed by Pete missing the opportunity.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

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Pete O'Hanlon28-Sep-10 10:51

28-Sep-10 10:51

I didn't miss the opportunity - I prefer to pick out the less obvious ones.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

Luc Pattyn28-Sep-10 10:59

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

28-Sep-10 10:59

So I didn't have to read your initial reply twice just to make sure I didn't miss something under the surface.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Pete O'Hanlon28-Sep-10 11:06

28-Sep-10 11:06

Nope - it was a straight answer.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: How I can get Name, Sexual, Date of birth, Nationality...from ICAO line

AspDotNetDev28-Sep-10 13:42

AspDotNetDev

28-Sep-10 13:42

I certainly saw nothing queer about it.

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Enable/Disable LinkButton in Javascript

SatyaKeerthi1527-Sep-10 21:19

SatyaKeerthi15

27-Sep-10 21:19

I want to disable a LinkButton click on the client site.

if(true)
objLinkButton.disabled = true;
else
objLinkButton.disabled = false;

This disables the link but I am still able to click on the link and do PostBack.

Is there any way I can disable/enable the link.

Re: Enable/Disable LinkButton in Javascript

Pete O'Hanlon27-Sep-10 22:03

27-Sep-10 22:03

You also need to remove/add the href for the link depending on what you want to do.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

Re: Enable/Disable LinkButton in Javascript

SatyaKeerthi1528-Sep-10 1:01

SatyaKeerthi15

28-Sep-10 1:01

Yes I tried it like below,

document.getElementById(lkbtn).removeAttribute("href"); This works fine. But when i am adding attribute it raises error.

document.getElementById(lkbtnEditMap).addAttribute("href");

So i did like this
document.getElementById(lkbtnEditMap).setAttribute("href"); enable/disable works fine but when click on link button it showing error like resource cannot be found....

Re: Enable/Disable LinkButton in Javascript

Pete O'Hanlon28-Sep-10 1:14

28-Sep-10 1:14

SatyaKeerthi15 wrote:
document.getElementById(lkbtnEditMap).setAttribute("href");

What are you setting the link to? You haven't actually specified the href value in there.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads