C# Discussion Boards - CodeProject

Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

Waleed Eissa29-Jul-08 0:24

29-Jul-08 0:24

Hi gurus, I'm looking for a collection that combines the functionality of a list and dictionary. I basically want to be able to keep the order in which the items are added and at the same time do fast lookup? O(log n) as opposed to O(n), does this thing exist or do I have to write it myself?

Regards

Waleed Eissa
Software Developer Sydney

Re: Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

Guffa29-Jul-08 0:48

Guffa

29-Jul-08 0:48

If you can use a SortedDictionary, it's loopup is a O(log n) operation.

Otherwise you need to write it yourself. Just wrap a List and a Dictionary in a class, write an Add method that adds an item to both collections, and properties to get the values by index and by key.

Despite everything, the person most likely to be fooling you next is yourself.

Re: Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

Frank Horn29-Jul-08 2:17

Frank Horn

29-Jul-08 2:17

Guess you have to write it yourself, like KeyList<T> with members List<T> and Dictionary<T> to which you delegate. But then I'm not a guru...

Re: Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

Waleed Eissa29-Jul-08 2:44

Waleed Eissa

29-Jul-08 2:44

Thanks guys for your replies, seems like I'll have to write myself .. just wanted to be sure I'm not wasting my time in reinventing the wheel ..

Waleed Eissa
Software Developer Sydney

Re: Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

J4amieC29-Jul-08 3:04

J4amieC

29-Jul-08 3:04

Does SortedList in the System.Collections.Generic namespace not work for you? It has a GetByIndex method along with key lookup!

Re: Is there a collection in .NET that combines the functionality of both a List and a Dictionary?

Waleed Eissa30-Jul-08 3:18

Waleed Eissa

30-Jul-08 3:18

Thanks for your reply, actually I want to keep the same order in which items are inserted, this is why SortedListed and SortedDictionary are not suitable for the job ..

Waleed Eissa
Software Developer Sydney

Get Element which is clicked next

ezazazel29-Jul-08 0:01

ezazazel

29-Jul-08 0:01

Greetings!

I'd like to do this:
I have a Button which defines the value of a bool Parameter:

public bool ListenMode { get; set; }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            ListenMode = !ListenMode;
//TODO: Route all click Events to a self defined method
        }

Further I have a Grid which can contain certain Items.

What I want to do is, that if ListenMode is true, and the next element clicked on is one of those Items, get the item.

The problem (if it is one) is, that I don't know how to catch all the next clicks while ListenMode is true.

Any suggestions would be apreciated.

PS: It's done in WPF if this is of any matter.

Thank you in advance,
eza

find page rand of a site ????

mr.mohsen28-Jul-08 23:33

mr.mohsen

28-Jul-08 23:33

hi friends
i am working on a project. in this project we simulate a search engine to achieve some specific information about our users.
in this search engine i want to save the rank of a site in the database. but i dont know how can i get the rank of a site programmatically??? i write this application with c#.net
thank you for your reply.

nobody help you...
you have to help you yourself
and this is success way.

Re: find page rand of a site ????

Guffa29-Jul-08 0:53

Guffa

29-Jul-08 0:53

First you have to specify what the rank for a web site should be in your application.

After that you should know what the input data needs to be so that you can collect it, and what formula to use to calculate the rank from the input data.

Despite everything, the person most likely to be fooling you next is yourself.

Re: find page rand of a site ????

mr.mohsen29-Jul-08 2:16

mr.mohsen

29-Jul-08 2:16

thank you
but i did it, i calculate rank t any site with my formula
but i want to save google page rank( with google formula) too.
there are some site to get u a google page rank if u enter the url address on it.
i want get the google page rank in win application with c#.net

nobody help you...
you have to help you yourself
and this is success way.

Row clicking in ViewGrid in C#.NET2.0

YSridhar28-Jul-08 23:10

YSridhar

28-Jul-08 23:10

I want to get the data while single or double clicking the row in the view grid in C#.NET2.0.

Re: Row clicking in ViewGrid in C#.NET2.0

stancrm28-Jul-08 23:19

stancrm

28-Jul-08 23:19

Use event DoubleClick from DataGridView.
If the event comes, then read the value, for example :

dataGridView1.SelectedRows[0].Cells[0].Value

Regular Expression Help

Paw Jershauge28-Jul-08 22:35

Paw Jershauge

28-Jul-08 22:35

Can someone give me an search and replacement pattern to regular expression for this convertion.

From text:

for (<br />
; rs.Read(); <br />
)<br />
{<br />
	AddFromRecordSet(rs);<br />
}

To text:

while(rs.Read())<br />
{<br />
	AddFromRecordSet(rs);<br />
}

Thanks.

With greate code, comes greate complexity, so keep it simple stupid... $Shucks | :-\$ $Shucks | :-\$

Re: Regular Expression Help

Christian Graus28-Jul-08 22:48

Christian Graus

28-Jul-08 22:48

I don't see any candidate for a regex here, what are you trying to do ?

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

Re: Regular Expression Help

Paw Jershauge28-Jul-08 22:56

Paw Jershauge

28-Jul-08 22:56

Im trying to clean up the messy code codedom creates...

CodeDom can not make While loops in CSharp language. it creates an for loop "which is actualy what an while loop is", but an developer, will always want to write an while loop instead of an for loop when it looks like i wrote above...

Thats what i want to do... Wink | ;)

With greate code, comes greate complexity, so keep it simple stupid... $Shucks | :-\$ $Shucks | :-\$

Re: Regular Expression Help

Paw Jershauge29-Jul-08 22:17

Paw Jershauge

29-Jul-08 22:17

I think I found the answer, let me know if its wrong:

Search pattern: \bfor\b $(.*?);\s(.*?)\;(.*?)$
Replace pattern: while($2)

RegOption.Singleline = on

With greate code, comes greate complexity, so keep it simple stupid... $Shucks | :-\$ $Shucks | :-\$

Installer/setup file should support for single machine

PrakashBhaskar28-Jul-08 22:14

PrakashBhaskar

28-Jul-08 22:14

Is it possible to create a installer/setup file and make it as a CD and we should use this CD in one PC. If that CD is already used in particular PC and that CD should not support other PC. Is this possible.

Thanks
Warm Regards
Prakash-B

Re: Installer/setup file should support for single machine

stancrm28-Jul-08 22:33

stancrm

28-Jul-08 22:33

1. That is no possibilities to write to CD (except if you have a CD Recorder)... Smile | :)

2. It's like Mission Impossible ... this CD will be explode in 5 sec.. Smile | :)

Change your application, that the user must be register first.
If you create a serial number for that PC, you must take for example MAC-Address for the serial number.
That means, that serial number is valid only for that MAC-Address. Not for other PC.

Re: Installer/setup file should support for single machine

PrakashBhaskar28-Jul-08 22:51

PrakashBhaskar

28-Jul-08 22:51

I have saw some software CD's that can be used in only one PC. If that CD is used in one machine you cannot use that CD in another machine. I heared that they have used embedded systems. I did not find any clue please advice

Thanks
Warm Regards
Prakash-B

Open File Dialog with Image Preview

Sukhjinder_K28-Jul-08 21:59

Sukhjinder_K

28-Jul-08 21:59

I found one implementation here[^]. But I need similar functionality in C#.

Any Ideas?

Thanks
Sukhjinder...

Re: Open File Dialog with Image Preview

stancrm28-Jul-08 22:29

stancrm

28-Jul-08 22:29

http://www.codeproject.com/KB/dialog/OpenFileDialogEx.aspx[^]

Re: Open File Dialog with Image Preview

Sukhjinder_K28-Jul-08 23:01

Sukhjinder_K

28-Jul-08 23:01

Another Link I found on the above mentioned page http://msdn.microsoft.com/en-us/library/ms996463.aspx[^]

It seems I need to work with low level implementations (Windows Messages/Hooks, etc.). I'm looking for something which works well with MS .NET runtime and possibly with Mono as well.

It would be great if I can find some custom (not extended) implementation of OpenFileDialog with Preview box...

Thanks for all the information...

Looking for help on my OpenSource Media Player LetsYo

Re: Open File Dialog with Image Preview

stancrm28-Jul-08 23:12

stancrm

28-Jul-08 23:12

The OpenFileDialog Class is also using Windows API.
That means, you must search it again. Until now, I don't found any 100% .NET Codes of FileDialog.

Differentt Typecasting for the same object

SatyaVas28-Jul-08 20:26

SatyaVas

28-Jul-08 20:26

Hi All

Already developed client(Developing for OPC) I am having code like below

1. OPCserverObj = Activator.CreateInstance( typeofOPCserver );

2. ifServer = (IOPCServer) OPCserverObj;

// connect all interfaces
3. ifCommon = (IOPCCommon) OPCserverObj;
4.ifBrowse = (IOPCBrowseServerAddressSpace) ifServer;
5.ifItmProps = (IOPCItemProperties) ifServer;
6.cpointcontainer= (UCOMIConnectionPointContainer) OPCserverObj;

Create different types of objects(type castings) with the same source object.

Note: IOPCServer, IOPCCommon, IOPCBrowseServerAddressSpace ..etc are different Interfaces.

How to achive this? How to decalre to object to get all 6 points.

Thanks in advance for your help
Satya

Re: Differentt Typecasting for the same object

Super Lloyd28-Jul-08 20:31

Super Lloyd

28-Jul-08 20:31

How about:
typeofOPCserver OPCserverObj = (typeofOPCserver)Activator.CreateInstance( typeofOPCserver ); ??

A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.