C#

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Usage of lookup tables feicki27-Jan-04 23:56 feicki 27-Jan-04 23:56  Hi! First of all, I'd like to excuse my stupid question . However, I'm having probelms understanding the use of simple lookup tables in c#. I do not want to use database to create them, but classes or data structures instead. How can it be accomplished? I'd appreciate if one could explain the idea and the usage thoroughly. Little more about my problem. I'm implementing an price collection software that fetches prices from multiple web sites. So one item (lets say MS Windows XP professional) may have multiple prices and it's name may me written in multiple ways (such as Win XP Pro or Microsoft Windows XP Professional etc). Any tips how to overcome this problem? Thanks you for your answers in advance! Feic Kilmore Re: Usage of lookup tables Mazdak28-Jan-04 0:28 Mazdak 28-Jan-04 0:28  I think the proper way is add a LIKE operation to your query string: SELECT * FROM mytable WHERE product LIKE 'WIN%' Or something like this query , I think most web sites use this mechanism. This would gain most of result correctlty. Mazy No sig. available now. Re: Usage of lookup tables feicki28-Jan-04 0:57 feicki 28-Jan-04 0:57  Thanks for your quick response. However, I don't want to use database but classes instead. Any good tips to overcome it? Feic Re: Usage of lookup tables Mazdak28-Jan-04 2:56 Mazdak 28-Jan-04 2:56  What do you mean exactlyy by not using database? You mean you want it disconnected from DB? So you can use DataSet and its Find() method when you after filling dataset. Mazy No sig. available now. Re: Usage of lookup tables Heath Stewart28-Jan-04 6:21 Heath Stewart 28-Jan-04 6:21  Besides maintaining an instance of a DataSet (which can be easily serialized to and deserialized from XML) and using Find, you can also use an IDictionary implementation like the Hashtable. This won't, however, allows you to find similar but different names without extending the Hashtable greatly. Otherwise, you can always build your own database-like implementation with lists, collections, and the sort. To find similar names you'll offen experience O(n) operations unless you use something like a character-based or word-fragment-based B-tree. Another option is to go with an in-memory database that exhibits the ACID properties (although it goes about transaction processing differently) known as Bamboo Prevalence (a .NET version of Prevayler, which is a Java implementation). See http://bbooprevalence.sourceforge.net/[^] for more information, or Object Prevalence with Bamboo Prevalence[^] for an article about it here on CodeProject.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- .NET Remoting Question andreas_aus_hamburg27-Jan-04 23:48 andreas_aus_hamburg 27-Jan-04 23:48  Hi! I've written a Client-Server-Application using Remoting. The Server runs as a WindowsService on a Windows 2003 or Windows 2000 Server. So far everything is working fine. But if the Server has 2 or even more Network-Cards installed - how do I tell my RemotingApplication which one to use? and 2nd: how do I get the IP-Address of each Network-Card? Any help would be really appreciated! Andreas Re: .NET Remoting Question msdnexpert28-Jan-04 5:45 msdnexpert 28-Jan-04 5:45  You just have to specify the appropriate port. Windows device manager will internally map the port to one of the multiple network cards. Re: .NET Remoting Question andreas_aus_hamburg28-Jan-04 11:30 andreas_aus_hamburg 28-Jan-04 11:30  I already got that port-thing - my question was if I can tell the Framework/App explicitly which Network-Card to use? anyway thanks for your answer! Andreas WebService question Mazdak27-Jan-04 23:35 Mazdak 27-Jan-04 23:35  In my asmx page, user can request for WSDL . How can I disable it. I want only my priivate customer access to the service defenitions. Mazy No sig. available now. Re: WebService question Heath Stewart28-Jan-04 6:05 Heath Stewart 28-Jan-04 6:05  After digging through the assemblies and documentation, if there is a way I haven't found it. However, hiding information is by no means a way to secure information. Instead of worry about others getting your service definition, use the Web Services Enhancements 1.0[^] (2.0 is still a preview and shouldn't be used / can't be used due to licensing restrictions in production environments). You can add WS-Security (remember my XML Digital Signatures article? That's a part of it) and many other things (like authentication via X.509 certificates) to ensure that no matter who gets your WSDL, only people to whom you grant credentials or certificates (or both) can access your Web Service. This is by far a better way than just hiding it. If someone wants your service definition that badly, they will get it.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: WebService question Mazdak28-Jan-04 7:26 Mazdak 28-Jan-04 7:26  Heath Stewart wrote: Web Services Enhancements 1.0 hmmmm. Good point. Thanks. Mazy No sig. available now. C# modem and mp3 devvvy27-Jan-04 19:58 devvvy 27-Jan-04 19:58  Just day dreaming here. But how can you dial to a phone using modem/C#/.NET, then play a clip, say in mp3 format? norm Re: C# modem and mp3 Michael P Butler28-Jan-04 3:37 Michael P Butler 28-Jan-04 3:37  norm wrote: Just day dreaming here. But how can you dial to a phone using modem/C#/.NET, then play a clip, say in mp3 format? The simplest way would be to use the TAPI 3 COM objects via COM Interop. Have a read on MSDN for the Tapi 3 docs. It should at least get you a starting point of making the call. Not sure about playing mp3 down the phone though, I've only ever done that with Tapi 2 and Wav files via the Windows multimedia libraries. Michael But you know when the truth is told, That you can get what you want or you can just get old, Your're going to kick off before you even get halfway through. When will you realise... Vienna waits for you? - "The Stranger," Billy Joel George Shepherd's Windows Forms FAQ Shree27-Jan-04 18:11 Shree 27-Jan-04 18:11  http://www.syncfusion.com/FAQ/WinForms/default.asp Network Programming in C# ASGill27-Jan-04 16:23 ASGill 27-Jan-04 16:23  Hi, Im using C# to create a clinical information system(data management) what i would like to know is on what OS will the app run...some guys told me that .net apps are not able to run on win98 OS...this worries me alot...im at the point of no return...i heard that there is a framework or something to solve this...pls tell me 2. i want my software to send certain information from one form to a different form(in the same app) on a diff. workstation...is there anywhere where i can get resources for networking codes...maybe u guys could gimme some initial/crutial points...thx alot Arvinder Gill Re: Network Programming in C# Heath Stewart27-Jan-04 18:29 Heath Stewart 27-Jan-04 18:29  ASGill wrote: some guys told me that .net apps are not able to run on win98 OS That's incorrect - the .NET Framework is not supported on Windows 95. ASGill wrote: i want my software to send certain information from one form to a different form(in the same app) on a diff. workstation .NET Remoting is your answer. This is the de facto way of marshaling and transmitting data between two different AppDomains. See Accessing Objects in Other Application Domains Using .NET Remoting[^] for topics and examples. Also visit http://www.ingorammer.com[^] for arguably one of the best sources for .NET Remoting information. He also has a book. And speaking of books, there's also Microsoft .NET Remoting[^] from the Microsoft Press. It's a good intro and intermediate book on .NET Remoting. You can also search the CodeProject site for information on .NET Remoting as well.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Network Programming in C# ASGill27-Jan-04 23:02 ASGill 27-Jan-04 23:02  well thats a big relieve abt .NET apps not working on WIN 98...and also thx for the resources abt .NET Remoting i dint had any cllue abt it until you told me...great help friend!...thx a mil. Arvinder Gill CODER Making my class support [] notation Christian Graus27-Jan-04 15:34 Christian Graus 27-Jan-04 15:34  I've flat out forgotten how to make my class accept [] notation, as in: myClass[0] = 7; any help appreciated.... Christian I have drunk the cool-aid and found it wan and bitter. - Chris Maunder Re: Making my class support [] notation Nick Parker27-Jan-04 16:04 Nick Parker 27-Jan-04 16:04  Christian Graus wrote: myClass[0] = 7; What is referenced with myClass[0]? - Nick Parker   My Blog Re: Making my class support [] notation Christian Graus27-Jan-04 16:13 Christian Graus 27-Jan-04 16:13  It's OK, I figured it out: public object this [string key] { get { etc. Thanks though. Christian I have drunk the cool-aid and found it wan and bitter. - Chris Maunder Lockdown PC johnstacey27-Jan-04 14:51 johnstacey 27-Jan-04 14:51  Hi, I am relatively new to C#. I am trying to implement a system which locks the user out from all Windows functions such a the 'Start Menu', shortsuts such as CTRL-E and CTRL-ALT-DEL. Basically I have designed a database for the public to search for emigrant records from the 19th Century between Europe and US. But as with all things I am getting 'fiddlers' who seem more interested in trying to mess up Windows settings. So what I need to do is have a splash screen which will display the shortcut or link to the database and nothing else. The program will then lock out any attempt to access any other Windows functions. Is this sort of functionality available in C# and if so does anyone have any suggestions, Regards, John Re: Lockdown PC Christian Graus27-Jan-04 15:32 Christian Graus 27-Jan-04 15:32  You're using the wrong language - you need to set up some system hooks, which I believe requires C++, although it may be possible using some sort of funky interop stuff. Christian I have drunk the cool-aid and found it wan and bitter. - Chris Maunder Re: Lockdown PC Nick Parker27-Jan-04 16:07 Nick Parker 27-Jan-04 16:07  A couple of links: Using Hooks from C#[^] Windows Hooks in the .NET Framework[^] - Nick Parker   My Blog Re: Lockdown PC Heath Stewart27-Jan-04 18:23 Heath Stewart 27-Jan-04 18:23  Ctrl+Alt+Delete is not something you can hook, though. This is by design. One can hook Ctrl+Tab and similar key combos.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Lockdown PC Anonymous27-Jan-04 23:09 Anonymous 27-Jan-04 23:09  One thing you can do that fairly easy is to set your app as the shell, this will stop access to Start menu and the entire desktop, but not Ctrl-Alt-Del.

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