C# Discussion Boards - CodeProject

Dave Kreskowiak12-Mar-12 5:25

12-Mar-12 5:25

What do you mean by "formatting the above string"??

Are you looking to pull information out of the string?? What would that data be??

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Dave Kreskowiak

Sunil P V12-Mar-12 5:32

Sunil P V

12-Mar-12 5:32

Hi Dave,

This is my requirement. I read a line from a file, which is in the following format: [Some message 123...]
So I would want to create a RegEx pattern for the above format. What would be the expression for this case. I tried this but it failed while calling method RegEx.Match():

RegEx _exp = new Regex(@"^\[(?<message>\w+)]", RegexOptions.IgnoreCase);

Sunil

djdanlib12-Mar-12 6:41

djdanlib

12-Mar-12 6:41

That still doesn't help. Why do you need a regex, what problem is it supposed to solve?

Dave Kreskowiak12-Mar-12 7:18

12-Mar-12 7:18

sunilkpv wrote:
So I would want to create a RegEx pattern for the above format

TO DO WHAT??

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Dave Kreskowiak

Richard MacCutchan12-Mar-12 6:21

Richard MacCutchan

12-Mar-12 6:21

Why are you using a RegEx when you can easily separate the tokens of the message with the String.Split()[^] method? Perhaps if you explain exactly what you are trying to do we can make some more informed suggestions.

Unrequited desire is character building. OriginalGriff
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PIEBALDconsult12-Mar-12 7:01

PIEBALDconsult

12-Mar-12 7:01

There is a Regular Expression forum.

Perhaps you should provide more examples and the results you want.

If you want to separate the message part from the number part, perhaps something like this might help:

@"(?'message'[^\d]*)(?'number'[\d]*)"
or
@"(?'message'.*?) message (?'number'.*)"

limit memory c#

william ormundo12-Mar-12 4:29

william ormundo

12-Mar-12 4:29

Good Morning,

Please,

Is there a limit memory on the Windows to an application c#?

Ex: I have a program that carry different informations and that information are equals 2 GB for example

but when I go to do other process I can't do because it's give me Exception System.out.of.memory

how can I change this limit?

thanks

William

Dave Kreskowiak12-Mar-12 4:55

12-Mar-12 4:55

Not enough information.

How much memory is in the machine? Which version of Windows are you running? What code is throwing this exception? How big is the object you're allocating?

Under .NET, OutOfMemory exceptions cover a lot of things, some of which have nothing to do with running out of memory.

Also, no single object in .NET can be larger than 2GB. So, if you're trying to allocate say, an array of integers greater than 512 million elements, it's going to fail.

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Dave Kreskowiak

william ormundo12-Mar-12 9:44

william ormundo

12-Mar-12 9:44

I'm using 8GB of Memory Ram, Windows 7 Professional 64 bits. Virtual Memory 6144 MB.
I carry a HashTable With 5 000 000 of records, this equivalent 2GB, but when I go to create other array of 25000 positions give me System out of memory exception.
If I stop the code in this section and instantiate the array in another application works perfect, so I have memory on the machine, so I see that the problem is the limitation of each application
thanks

Luc Pattyn12-Mar-12 10:06

12-Mar-12 10:06

Three thoughts:

1. is your app running in x-64 mode? how did you build it: x-86, x-64, or "Any CPU"?

2. could it be a fragmentation problem: objects larger than 80KB go in the Large Object Heap, which never gets compacted, hence could fragment when many different sized objects get allocated and freed in random order.

3. do you really need/want that big a hash table, wouldn't a database be more appropriate? or a completely different algorithm? (we don't know what it is your app is doing...)

Smile | :)

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william ormundo12-Mar-12 10:31

william ormundo

12-Mar-12 10:31

X86, I use hash because i need fast performance, this informations already has a database.
thanks

Luc Pattyn12-Mar-12 10:35

12-Mar-12 10:35

If you aren't using any components that force you to keep building for x86, then go for x-64 (or "Any CPU"), and take advantage of the huge address space it offers. Mind you, each process must be homogeneous, you can't mix x86 and x-64 code in one build.

Smile | :)

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Dave Kreskowiak12-Mar-12 10:08

12-Mar-12 10:08

On top of what OriginalGriff said, it also depends on what you're doing. If you're resizing the HashTable to get to this point, you've fragmented the Large Object Heap. This will give you a problem. The Large Object Heap is never defragmented (for performance reasons).

So, if you started with a small(ish) HashTable, then exand it to accomodate more entries, you're actuall creating a new HashTable object with greater capacity, copying the references in old object to the new one, then destroying the old HashTable. Do this enough and you'll end up fragmenting the Large Object Heap to the point where you've got, say 5GB of memory available, but no free blocks of memory big enough to hold your new expanded HashTable all in one shot. There is no way to force a defrag of the Large Object Heap.

To get minimize this, try specifying the expected capacity of the HashTable when you create an instance of it.

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Dave Kreskowiak

OriginalGriff12-Mar-12 7:28

OriginalGriff

12-Mar-12 7:28

There is no limit of 2GB for all information in .NET - but there is a limit of 2GB for any one object in .NET

What that means is that each object you create must be less than 2GB - you can have an array of 536,870,912 strings, each string of which can be 1GB in size, but you cannot have an array of 536,870,913 strings (assuming each reference is 32 bits, that would take teh total size of the array over 2GB - for 64 bit references the size is halved).

This doesn't mean that you won't get "out of memory" errors - it depends on how much virtual memory is available to .NET and your system in general, and you may run out of memory if the garbage collector can't free up a big enough chunk to fill a request.

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defining a row grid within a column grid, c#, wpf

jschell12-Mar-12 8:55

jschell

12-Mar-12 8:55

william ormundo wrote:
but when I go to do other process I can't do because it's give me Exception
System.out.of.memory

Only way I can see that happening is if you have turned off virtual memory. And that has nothing to do with C#, it is an OS configuration issue.

Sutton Mehaffey12-Mar-12 3:37

Sutton Mehaffey

12-Mar-12 3:37

I have a grid with 3 defined columns. Is there a way to divide column 1 into 3 grid rows without affecting the other 2 columns? I've tried defining RowDefinitions, but it spans all 3 columns. I don't want that. I only want it to affect the 1 column.

Re: defining a row grid within a column grid, c#, wpf

Wes Aday12-Mar-12 3:55

Wes Aday

12-Mar-12 3:55

Sutton Mehaffey wrote:
affecting the other 2

Sutton Mehaffey wrote:
I don't want that

Then put another grid with 3 rows in column one.

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Duplicate post

Pete O'Hanlon12-Mar-12 4:10

Pete O'Hanlon

12-Mar-12 4:10

Pick a forum and stick with it.

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Problem with Exchange server monitoring

Sebastian T Xavier11-Mar-12 19:05

Sebastian T Xavier

11-Mar-12 19:05

Hello All,

I have a problem with Exchange server 2007. I was trying to execute the following query get-mailbox | FL. This query was working when I tried it in the Exchange server's power shell console after executing following query Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Admin.

But I need it to be executed from a remote machine, so I have executed it from my powershell console , as follows...

$server='192.168.1.23';$pwd= convertto-securestring '123' -asplaintext -force;$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist 'exchangeserver\Administrator',$pwd; invoke-command -computername $server -credential $cred -scriptblock {Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Admin get-mailbox | FL}

But, this query fails with the following error...

A positional parameter cannot be found that accepts argument 'get-mailbox'.

  +CategoryInfo  :InvalidArgument:  {:} [Add-PSSnapin], ParameterBIndingException
  +FullyQualifiedErrorId: PositionalParameterNotFound,Microsoft.Powershell.Commands.AddPSSnapinCommand

I have modified this query again and added a ; after the snapin add section.

$server='192.168.1.23';$pwd= convertto-securestring '123' -asplaintext -force;$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist 'exchangeserver\Administrator',$pwd; invoke-command -computername $server -credential $cred -scriptblock {Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Admin; get-mailbox | FL}

This is also fails with the following error.

Active Directory server exchangeserver.xxxxxx.local is not available. Error message: The supplied credential is invalid. 

     + CategoryInfo           :   NotSpecified: <0:int32> [Get-MailBox],ADOperationException
     + FullyQualifiedErrorId  :   A2B6F75B,Microsoft.Exchange.Management.RecipientTasks.GetMailbox

Then I have removed the add-snap-in section from the command and executed again.

$server='192.168.1.23';$pwd= convertto-securestring '123' -asplaintext -force;$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist 'exchangeserver\Administrator',$pwd; invoke-command -computername $server -credential $cred -scriptblock {get-mailbox | FL}

Now it throws another error message.

The term 'get-mailbox' is not recognised as the name of a cmdlet, function, script file or operable program.
Check the spelling of the name, or if a path was included, verify that the path is corerct and try again.

     + CategoryInfo           :   ObjectNotFound: <get-mailbox:String> [],CommandNotFoundException
     + FullyQualifiedErrorId  :   CommandNotFoundException

Can someone help me on this?

Thanks in advance

Sebastian

Methods of a collection class are not always called

CDP180211-Mar-12 16:52

CDP1802

11-Mar-12 16:52

I have a collection class to hold the children of a control in a DIY user interface. The UI allows to add new controls by calling the Add() method of the collection. Nothing special and breakpoints in Add() are reached as long as the calls come from my own code. Everything is as it should be. Alternatively a view can also be loaded from XAML (using the XamlServices class). If that is done, the view is loaded correctly, but none of the breakpoints in any of the collection's methods are reached. As a result the parent control does not react to layout changes when children are added or removed. Still, XamlServices has successfully loaded the controls and their children, just none of my methods have been used and the layout has not been updated.

According to MSDN, XAML fills the collection with reflection (no real surprise) and looks for the IList interface to do that. I have implemented the complete IList interface and set breakpoints in all of the methods and properties, but they are only reached when the methods are called from my own code. Also, the collection may not be a generic list itself, but may be derived from a generic list. That is why I implemented my collection the following way:

public class ControlList : List<Control>, IList // Component is one of my own classes, not WPF, Silverlight or anything else of the usual!
{
    // Just one of the many IList methods
    public new void Add(cPraeComponent oComponent)
    {
        // Here comes code that is only executed when not using XAML
    }
}

I am convinced that XAML calls the methods of the baseclass (the generic list) instead of mine. My only idea up to now is to wrap the whole collection in a wrapper class which does not inherit from anything and implements IList, but this would be one ugly workaround. Does anybody have a better idea?

Edit: I tried deriving the collection from (forgive me) ArrayList, but that also did not change anything. It really looks like XAML always ends up calling the baseclass and not my methods.

I'm invincible, I can't be vinced

Re: Methods of a collection class are not always called

Luc Pattyn11-Mar-12 17:26

Re: Methods of a collection class are not always called

11-Mar-12 17:26

CDP1802 wrote:
public new void

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CDP180211-Mar-12 23:34

CDP1802

11-Mar-12 23:34

I assume you are wondering about the order of the modifiers, not about the 'new' modifier itself. As far as I know the sequence of the modifiers is unimportant. You could write 'public new' or 'new public' without changing anything.

I'm invincible, I can't be vinced

Re: Methods of a collection class are not always called

lukeer12-Mar-12 3:11

lukeer

12-Mar-12 3:11

I think he wanted to point out that override could work better than new here.

Ciao,

luker

Re: Methods of a collection class are not always called

Luc Pattyn12-Mar-12 3:26