Code Project - C# Discussion Boards

Re: How to query a matrix using LINQ

^Sir Dot Net10-Dec-09 14:07

^Sir Dot Net

10-Dec-09 14:07

Give this a shot. The tough part was trying to figure out how to get the indexer (using Select func)

var q = from n in num.Select( ( a, index ) => new { IX = index, Arr = a } )
        from z in n.Arr
        where z > 0
        select new {
             RootIndex = n.IX,
             Value = z
        };

This'll flatten out the matrix and only return index/values where value > 0
$Shucks | :-\$

Deplying a C# Application with Database Connection!

dennis_max279-Dec-09 1:23

dennis_max27

9-Dec-09 1:23

I've a application running now with a database connection and wanna make a deployment of it

I tried much things. So that's why I'm asking now is there a easy guide to follow where I can see what to do.

My connection string is hard coded, after I deployed the application it's still hard coded what is the way to let the Data Source (Computer Name) change automaticly to the new computername where it is installed?

(return @"Data Source=KONING-AF02EAF7\SQLEXPRESS;Initial Catalog=KringVrienden;Integrated Security=True";)

SofwareI'm using:
Visual Studio 2008.
SQL Server 2005
SQL Management Server 2005

Please help me.
Dennis,

Re: Deplying a C# Application with Database Connection!

loyal ginger9-Dec-09 4:25

loyal ginger

9-Dec-09 4:25

I am assuming that each of your target machine has a db server installed.

In your program use System.Environment.MachineName to get the machine name. Use this instead of the hard-coded machine name in your connection string.

Hope this helps.

Re: Deplying a C# Application with Database Connection!

vtchris-peterson9-Dec-09 4:45

vtchris-peterson

9-Dec-09 4:45

Rather than including your development machine name, simply use ".\SQLEXPRESS" or "(local)\SQLEXPRESS" as this will point to instance "SQLEXPRESS" on the local machine.

Code Project

Muhammad Farooq Qadri9-Dec-09 1:16

Muhammad Farooq Qadri

9-Dec-09 1:16

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology (GIFT), Khuiratta Azad Kashmir

Muhammad Farooq Qadri, Khuiratta AJK

Re: Code Project

Rob Philpott9-Dec-09 1:18

Rob Philpott

9-Dec-09 1:18

Dude,

You've posted this FOUR times.

http://msdn.microsoft.com/en-us/library/3e8s7xdd(VS.71).aspx

Regards,
Rob Philpott.

Re: Code Project

Ashfield9-Dec-09 1:28

Ashfield

9-Dec-09 1:28

Well, its like posting the same question several times. I would suggest you go to google and try there, there are over 500,000 articles.

Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP

Code Project

Muhammad Farooq Qadri9-Dec-09 1:15

Muhammad Farooq Qadri

9-Dec-09 1:15

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri, Khuiratta AJK

Code Project

Muhammad Farooq Qadri9-Dec-09 1:15

Muhammad Farooq Qadri

9-Dec-09 1:15

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri

Re: Code Project

Programm3r9-Dec-09 1:17

Programm3r

9-Dec-09 1:17

What is meant by threading?[^]

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Code Project

Muhammad Farooq Qadri9-Dec-09 1:08

Muhammad Farooq Qadri

9-Dec-09 1:08

code project is really a big project, working for IT development. Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri

Re: Code Project

Programm3r9-Dec-09 1:12

Programm3r

9-Dec-09 1:12

Huh?

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Memory Consumption

abcurl9-Dec-09 0:44

abcurl

9-Dec-09 0:44

string str = null;
can u tell, In the above line of code, what shall be teh memory consumption by the variable str

Re: Memory Consumption

Rob Philpott9-Dec-09 0:56

Rob Philpott

9-Dec-09 0:56

Well, str is a reference type which doesn't reference anything, so it will be just the size of reference itself. I think this will be 4 bytes for the reference itself, and a further 8 for synchronisation and other .NET internal stuff. So, likely 12 bytes.

Regards,
Rob Philpott.

Re: Memory Consumption

abcurl9-Dec-09 1:07

abcurl

9-Dec-09 1:07

Rob Philpott wrote:
and a further 8 for synchronisation and other .NET internal stuff.

Can u please tell where should i read the detailed meaning of the above quoted line ?

Re: Memory Consumption

Rob Philpott9-Dec-09 1:11

Rob Philpott

9-Dec-09 1:11

Actually, I got that wrong. The extra 8 bytes would be on the heap if your reference was not null. So, just 4 bytes on a 32bit machine. Trying to find a good reference for this stuff now.

Regards,
Rob Philpott.

Re: Memory Consumption

Rob Philpott9-Dec-09 1:19

Rob Philpott

9-Dec-09 1:19

Can't find anything on the net I'm afraid. I'm sure there's lots out there if you look around though. Also, consider reading one of Jeffrey Richters books - they are excellent on this sort of stuff.

Regards,
Rob Philpott.

Re: Memory Consumption

abcurl9-Dec-09 1:22

abcurl

9-Dec-09 1:22

Thanks a lot.

sorting arraylist of custom objects

Shameer E.A.9-Dec-09 0:36

Shameer E.A.

9-Dec-09 0:36

Dear techies..

Nice if you could please help me with sorting an arraylist i have which contains objects of type 'card', which inturn contains 2 enums - rank and suit.

The arraylist normally contains 7 card objects. eg :

spades 3, hearts 4, spades 1, diamonds 4, spades 2, clubs 4, spades 4

The sorted arraylist should be like:

spades 1,spades 2,spades 3,spades 4,clubs 4,hearts 4,diamonds 4 - with the suits together with sorted ranks

Many thanks in advance..

Re: sorting arraylist of custom objects

Abhinav S9-Dec-09 0:44

Abhinav S

9-Dec-09 0:44

Use a sorted list instead of an array list(http://msdn.microsoft.com/en-us/library/system.collections.sortedlist.aspx[^].

Re: sorting arraylist of custom objects

Rob Philpott9-Dec-09 1:03

Rob Philpott

9-Dec-09 1:03

You want to call .Sort on your ArrayList, the problem being though that Sort doesn't know how to compare two cards in order to do the sort.

To tell it this, you'll either need to extend 'card' to implement IComparable, or create a new seperate class which implements IComparer. Either way, you'll need to create a method which compares two cards. Compare suits first, and then if they are the same, the 'rank'.

Regards,
Rob Philpott.

Application Freeze

musefan9-Dec-09 0:29

musefan

9-Dec-09 0:29

Hi all,

I have an application (C# .Net WinForms) problem I am finding it difficult to solve, hopefully you guys will have some ideas...

This issue is that sometimes the application will freeze, by that I mean completely unresponsive - like if you perform long tasks on the UI thread. (I use BackgroundWorkers for a number of tasks when required)

Sometimes, I will get a message saying the application has stopped responding with little information I have found use of - it's an 'AppHangB1' error

The problem will occur regardless of which form is open, even a very basic one with little functionality (and no background workers)

I can recreate the issue two ways (not on all machines I tried thou) - If the system is idle an the station becomes locked, the application freezes when logging back in (not 100% of the time thou). The second method is too open internet explorer for a few seconds and then close/minimise, this causes the application to freeze (does not apply on a second machine I tested)

If any one has any ideas or pointers as to what I should be looking for then your responses will be much appreciated.

Thanks

Life goes very fast. Tomorrow, today is already yesterday.

Re: Application Freeze

Member 33524189-Dec-09 0:43

Member 3352418

9-Dec-09 0:43

Hi musefan,

If this is not happening on all the PC's as you said; it might be due to

1) Memory problem (memory leak); check for memory hungry applications running.
2) OS update differe (Check for difference on the PC it is not happening)
3) Check for cross-loops creating infinit loop if any in your code.
4) Also might cause due to virus problem.

Regards,

Maruti

Re: Application Freeze

musefan9-Dec-09 1:08

musefan

9-Dec-09 1:08

Hi,

Thanks for your reply. In response to your suggestions...

1) I have 3GB memory installed, at at the time of freezing no applications are using excessive amounts of memory. Total usage around 45%

2) When I said not happening on other PC, I meant when I can recreate with internet explorer open/close - This issue itself has occurred on all tested machines at some point

3) The freeze occurs on a basic form not long after start-up, when I create the freeze in debugging mode and then pause the process. The highlighted code is Application.Run in the Program.cs file. I would have thought if an infinite loop error then It would shown a line of code in the loop, - well if on the UI thread, a background thread infinite loop should not freeze the UI thread though surely

4) Due to it only freezing my application and on multiple machines, I think a virus is unlikely (Unless you include Vista as a virus Laugh | :laugh:

)

Thanks again

Life goes very fast. Tomorrow, today is already yesterday.

Get Control at Point in another Window

Programm3r9-Dec-09 0:18

Programm3r

9-Dec-09 0:18

Hi all,

I am trying to get hold of a control (context menu item) that the user has clicked on in another window. Let me explain some more:

I have wrote a VSTO add-in which has a mouse and keyboard hook. The hook checks for any combination of shift+delete. So in Outlook, when the user right clicks on an item, then holds the Shift key in while clicking the Delete context menu item the hook fires, but it will fire even if the user hasn't selected any items. Frown | :(

It will fire on every Shift(Key) + Right Mouse button click ... this is not right Thumbs Down | :thumbsdown:

So I am trying to get hold of the "Delete" context menu item within Outlook so that I can know when the user is actually trying to delete something.

Any suggestions?
Many thanks in advance.

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

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