C# Discussion Boards - CodeProject

28-Sep-06 2:56

In Asyn Callback if some error happens and it enters into a infinite loop then all other calls will be hanged or these request will get result.

User 665828-Sep-06 3:09

User 6658

28-Sep-06 3:09

Question?

modified 12-Sep-18 21:01pm.

subrata.jana2-Oct-06 5:21

2-Oct-06 5:21

hi i m writing code for a Client/Server mechanism, here many users can connected and get some data. Now in some connection there might be some errors and that particular asyn call may enter in a infinite loop. So in this case the other users connected are able to make request and get data or server will stop responding to them also.

Thanks in advance.

User 66582-Oct-06 14:15

User 6658

2-Oct-06 14:15

If you don't create a seperate thread for all your incoming connections then an infinite loop will hang your entire program.
But even if there's some errors in the data your application should never, under any circumstances, fall into an infinite loop. Also not, when it uses multiple threads. Try to handle this error so your app won't create and infinite loop, check the incoming data for errors etc.

regards

modified 12-Sep-18 21:01pm.

Rob Graham28-Sep-06 4:30

Rob Graham

28-Sep-06 4:30

I think you are asking:
"In Asyn Callback if some error happens and it enters into a infinite loop then will all other calls will be hanged or will these requests be processed?".
I beleve the answer is that they will hang.

subrata.jana2-Oct-06 5:28

2-Oct-06 5:28

Hi As per ur believe it will hang and it is really so. So now how can i achieve this. Say in ATM a user comes and checks his balance now if there is some error in server them it is particular for that request all other users are not affected.

My requirement is same the if a asyn call enters into infinite loop it should be for that call only not for all the subsequent request.

thanks in advance

User 66582-Oct-06 14:17

User 6658

2-Oct-06 14:17

Create a Thread for each incoming connection, you may want to use a ThreadPool for this. But see my answer above, don't let your app fall into a infinite loop at all!

regards

modified 12-Sep-18 21:01pm.

Password Protected Pdf

subrata.jana28-Sep-06 2:52

28-Sep-06 2:52

How can i add password to a pdf file in C#.

Nader Elshehabi28-Sep-06 2:57

28-Sep-06 2:57

Hello

This depends on the library -if any- you are using. No classes in C# deals directly with pdf files.

Regards

subrata.jana2-Oct-06 5:30

2-Oct-06 5:30

hi Do CodeProject has some example of writing pdf with passsword protection.

pls guide me with some examples to how to get this done.

thanks in advance.

Nader Elshehabi2-Oct-06 12:15

2-Oct-06 12:15

You won't find examples for "writing pdf with passsword protection" straightforward. Searching for that won't get you anywhere. What you are looking for is a pdf writing library. Some commercial libraries are out there. As I told you, search CodeProject's articles areas for "pdf", or google for "pdf C# library". That might get you closer.

PS.
Elcomsoft has a program called Advanced PDF password recovery by the way. So, if your documents isn't that value, don't make the effort. Good luck!

Regards

Suelinda_W5-Oct-06 8:39

Suelinda_W

5-Oct-06 8:39

Hello,

ComponentOne has a control, PDF for .NET, which allows you to create password protected PDF files. For more information, and to download a free evaluation, please visit http://www.componentone.com/products.aspx?TabTypeID=1&ItemType=1&PanelIndex=14&ItemID=54543&SubCategoryTypeID=0&TabMapID=97&TabID=116[^].

Suelinda W
Customer Engagement, ComponentOne LLC
http:\\www.componentone.com

Splitting an ArrayList

scotlandc28-Sep-06 2:39

scotlandc

28-Sep-06 2:39

Hi,

I have an ArrayList which was populated by a text file with no column headers. What I want to do is split the ArrayList into columns then display it in a datagrid. The ArrayList is made up of lines such as

0168EH1X.PA0 020 1 GRA_ 08/14/06 12:16:42

I need to split this into 5 columns under the headings ID, Duration, Status, Channel and DateTime.

I've been trying to do this with the .SubString method but no luck. I know how to define the columns in the grid but I can't split the ArrayList up. Please can anyone help?

Thanks

Scott

Nader Elshehabi28-Sep-06 2:56

28-Sep-06 2:56

Hello

Is your ArrayList an array of strings each on the above format?

Regards

scotlandc28-Sep-06 2:57

scotlandc

28-Sep-06 2:57

Hi,

Yes, it is. Anywhere between 10 and 150 strings. The format for each string is identical.

Nader Elshehabi28-Sep-06 3:07

28-Sep-06 3:07

scotlandc wrote:
0168EH1X.PA0 020 1 GRA_ 08/14/06 12:16:42

I need to split this into 5 columns under the headings ID, Duration, Status, Channel and DateTime.

Simple! use

MyArrayList[X].ToString().Split(' ');

to get an array of strings of each column.

Regards

implement fast keys like ctrl v

scotlandc28-Sep-06 3:10

scotlandc

28-Sep-06 3:10

Thank you very much, will give it a go.

SysTray

CodeItWell28-Sep-06 2:04

CodeItWell

28-Sep-06 2:04

How to minimize my program in system tray.
To have contextMenu and icon in systray.
Heeeeeeeeeeeelp.

Vasildb

Re: SysTray

Alex@UEA28-Sep-06 2:20

Alex@UEA

28-Sep-06 2:20

Vasildb wrote:
Heeeeeeeeeeeelp.

I think that the 'e' must be sticking on your keyboard.

I needed to do this recently myself and rather radically I did a search for it on Google.

To save you spending valuable seconds doing the same, here is the url that I found.

http://www.codeguru.com/csharp/.net/net_general/tipstricks/article.php/c6933/[^]

regards

Alex

PS you should try Google sometime it's surprisingly useful!

faladrim28-Sep-06 2:02

faladrim

28-Sep-06 2:02

hi,

i was wondering how i can use fast keys in my app
i have a menu and i want to be able to use the ctrl key to open and use elements of it
anybody any ideas?

thx

Re: implement fast keys like ctrl v

Not Active28-Sep-06 2:22

Not Active

28-Sep-06 2:22

Use the & symbol before the letter you miss to be used

&File = Alt+F
E&xit = Alt+x

only two letters away from being an asset

hi, how can i send data to USB port in c#.net 2003 framework is 1.1

premkamalg28-Sep-06 1:57

premkamalg

28-Sep-06 1:57

Hi !

I have to access USB port using C# .NET 2003 and framework is 1.1 to read/send data from device.
i Know to access the namespace but
using system.io.port
but it works in net.2005 only how can i ?

i don't used the "mscomm" also
i want use the API's
plz send sample code for that
it's very usefulll for me
Thanks

Re: hi, how can i send data to USB port in c#.net 2003 framework is 1.1

Nader Elshehabi28-Sep-06 2:48