C# Crawler

Registry R/W article changes...

Tue, 15 Oct 2002 22:54:19 GMT

Registry in C# article was slightly changed, general descriptions where improved and a correction about the Flush() method has been added.

Note that there might be a change in Flush() method from .NET FW version 1, and SP2, seems like SP2 deals better with the MSDN saying that Flush is rarely neede...but that is just a general thinking

New link

Sun, 13 Oct 2002 23:00:09 GMT

The guys who provided us with the free IDE for VB.Net and C#, also has several interesting .Net free libraries (with full source code).

Among the Libraries released is Zip Library, add that to your application and make it able to read/save Zip files.

Registry R/W in C#

Sun, 13 Oct 2002 22:43:37 GMT

An article about Reading and writing to system registry has been added to articles section.

The article is making use of the easy Class wrapping: Microsoft.Win32.Registry;

Got Dot Net?

Sun, 13 Oct 2002 22:24:42 GMT

I am Proud to announce that the amazing site: http://www.gotdotnet.com/team/csharp/

has decided to have me as a C# Friendly member.

thanks

.NET SP2 thingy

Sun, 13 Oct 2002 22:20:44 GMT

I saw this Q once more: My C# project (console) takes over 30 sec. to run, since i double click it...

Well, if you haven't installed .NET Framework SP2 then this might be the reason, but there is a known sollution that does the trick as well:

create a user named ASPNET as a local user account, you can even dissable the user, and supply no password.

But still, i dont know of any good reason (except internet connection problems) NOT to install the SP2!

C# to VB.Net translator..

Sun, 13 Oct 2002 22:15:54 GMT

Yes, there is such a thing, from C# to VB.Net translation.

tool #1: http://www.aspalliance.com/aldotnet/examples/translate.aspx

tool #2: http://www.kamalpatel.net/ConvertCSharp2VB.aspx

they are both not perfect, and each does have several unsupported features, so try them both, and decide which is perfect for you...let me knoe will ya?

Article Retrieved - Properting and Indexing

Thu, 10 Oct 2002 23:47:19 GMT

The article 'Properting and Indexing' has been succesfully retrieved from backup, and been placed at the articles section (its now at the links on the right)

One Process Please!

Thu, 10 Oct 2002 23:44:27 GMT

There are cases when we want our application to be activated only once, if a second instance is opened we want to terminate it, but before that we might want to show the first instance.

A great example is hown here at codeproject, it also good to note that this example is very good at showing how to easily interface with Win32 api's.

Site update

Thu, 10 Oct 2002 23:42:14 GMT

Site has been slightly updated, to provide extra space for text.

The Articles section now includes all articles that have been posted for the last two months, for extra space and greater archiving.

The Weblog itself will start from now to include only updated on articles added, and/or short C# explanations...meaning that all LOOOONG code examples, or explanations will auto-become articles.

i'd love getting feedback.

Install Shield killer

Wed, 09 Oct 2002 22:26:28 GMT

You cant catch me update on bugs daily, but a bug that actually have been discussed in Microsoft formal newsgroup caught my attention for repeating itself over and over...

it seems that installing Install Shield 7 on top of Visual Studio .Net kills the windows installer...well not really but looks like it.

what install shield is doing is removing certain registry keys that are important for windows installer.

so if you got a weird error while compiling a setup project in visual studio .NET:

'An error occurred while validating. HR = 0x80040155'.

don't despair, you can download my export of the registry and import it, close visual studio

.NET, restart it, and everything will be cool...

Web services hosting (free)

Wed, 09 Oct 2002 22:21:48 GMT

There is a neat site, that helps in hosting ASP.NET web services.

while there are developers who need to make their web services available to the world, for

tests and/or for out side world usage, this site helps...have a peek

http://www.dotnetplayground.com/

They gone? ...na

Wed, 09 Oct 2002 22:20:59 GMT

I know that two articles have vanished from here due to me moving the radio, but dont despair, i will retrieve them...

Lets talk unsafe!

Wed, 09 Oct 2002 01:19:07 GMT

An article about unsafe coding in C# has been added to the links section (right).

[...] unsafe code in C# means usage of pointers, what the CLR does behind the scenes when we use a managed code is part of it, and by stating that we have an unsafe code, we declare a function/line to be 'able' to reach memory directly[...]

update

Wed, 09 Oct 2002 00:23:33 GMT

Just moved C# crawler to a new computer, forget the mismatch...

Guids

Thu, 19 Sep 2002 07:49:14 GMT

An easy and fast way to create unique ID's for your application is GUIDs,

A GUID is a 128-bit integer (16 bytes) that can be used across all computers and networks wherever a unique identifier is required. Such an identifier has a very low probability of being duplicated.

in C# we create a new guid like so:

System.Guid guid=System.Guid.NewGuid();

this will generate a guid out of your local MAC (network adapter physical address which itself is unique) your local time, and more...if you run this more then once: guid=System.Guid.NewGuid(); you are guaranteed to NEVER get the same guid again.

Threads made easy

Thu, 19 Sep 2002 07:36:34 GMT

Dont believe everything they told you...Threads in C# is not hard, in fact its not even easy, its SUPER easy.

A thread is an encapsulation of the flow of control in a program. you might be used to
writing single-threaded programs [...]

a new article is now available through the articles section (the left pane) or here

Is my string Interned?

Tue, 17 Sep 2002 12:20:54 GMT

String interning...what does it mean? catch a new article (right) that explains that exact issue.

[...]Defenition: The CLR maintains a table (the "intern pool"), which holds one instance of each unique string declared in a program, as well as any unique instance of string you programmatically added[...]

Downloader App

Thu, 12 Sep 2002 16:00:37 GMT

This you will all love...i hope.

I have wrote an application which make use of the easy class in C# - WebClient.

the application logs into a playboy pics site, and downloads ALL pictures from the site to your computer...now notice that its about 600 pics!!!

its on the articles section to the right.

Reading from Console

Tue, 10 Sep 2002 12:18:35 GMT

A very nice,easy and smart way to run a console application as a second process from your console application, and read its output into string buffer of your application.

Articles links to the right.

Abstract in my Class

Tue, 10 Sep 2002 11:50:14 GMT

Abstract abstract abstract, what is it?

well read it all on the new article about C# Abstract Classes.

Hashtable: add versus property

Wed, 04 Sep 2002 10:04:11 GMT

In my last Hashtable & serialization example, you my have noticed a Hashtable addition that has a different approach then the retrival.

for addition we used: myCollection.add(mn,ad);

for retrival we used: ad = myCollection[mn];

where myCollection is the hashtable, mn and ad are structs.

i got an email saying that an addition could be performed as such: myCollection[mn]=ad; and that is correct and excellent, but lets point the differences between property addition and add method:

While using a property addition (eg myCollection[mn]=ad;) we can add new items, However, if the specified key already exists in the Hashtable, setting the Item property overwrites the old value. In contrast, the Add method does not modify existing elements, and if the item exists, an exception is thrown.

hope that clears things up.

Hashtable serialized

Tue, 03 Sep 2002 12:54:09 GMT

Just added a new **article** to the articles section (left).

this article shows a full usage of the hashtable data structure in C# and a way to serialize it into a binary file.

the full application is a phone-like book, you can freely change it and use it as you wish.

any questions regarding that article will be hapily answered

Find & replace insensitive

Tue, 03 Sep 2002 11:11:45 GMT

This has been a question that i saw couple of times at the Microsoft news groups...and it goes something like that: "Is there a way to search a given string for a specific sub-string and replace that with another, but the string to be searched will be case insensitive?"

And i decided to sit down and hit the keyboard until a nice function will come up, and it works,,,check the articles link (right) for the 'Find & replace Insensitive' article...

Play with C# strings (my 1st article)

Thu, 15 Aug 2002 08:37:23 GMT

Check out my first article, on the 'articles' link to the left (below the 'home' link).

the article shows how to transit to C# form C++ and not be afraid from the strings...and chars....and ....well read the damn article.

Convert to HEX

Thu, 15 Aug 2002 08:03:04 GMT

Q: How can i convert an integer to HEX?

A: One way would be: string str = System.Convert.ToString(integer, 16);

Basically, i feel that System.Convert namespace holds everything i need for any conversion needed..