Seien Sie gespannt auf 5 Tage vollgepackt mit wertvollem Wissen und  Informationen über neueste technologische Entwicklungen in der Delphi-Welt – beste Networking-Möglichkeiten inklusive!

Natürlich sind auch wir von den Delphi-Experts mit einigen Workshops in der bekannt hohen Qualität vertreten. Inhaltliche Fragen zu den Veranstaltungen von mir, Daniel und Holger können gerne hier gestellt werden.

Hier alle Workshops im Überblick:

• Delphi 2010 – Was ist neu? Ein Intensiv-Workshop, Montag, 23.11.2009 – Olaf Monien und Daniel Magin
• Windows Vista & Windows 7, Montag, 23.11.2009 – Daniel Wischnewski
• Entwicklung von Webanwendungen mit der VCL für das Web/ IntraWeb, Dienstag, 24.11.2009 – Olaf Monien
• dbx4/Datasnap 2010 /BlackfishSQL, Dienstag, 24.11.2009 – Thomas Pfister
• Einführung in die professionelle Softwareentwicklung unter .NET mit Delphi Prism, Mittwoch, 25.11.2009 – Olaf Monien/ Holger Flick
• Reporting mit Delphi/Win32 und Delphi/Prism, Mittwoch, 25.11.2009 – Thomas Pfister
• Test Driven Development, Donnerstag, 26.11.2009 – Bernd Ua
• Delphi & COM Programmierung, Donnerstag, 26.11.2009 – Daniel Wischnewski
• Multithreading Delphi 2010 (nur Win32), Freitag, 27.11.2009 – Bernd Ua
• ASP.NET mit Delphi Prism, Freitag, 27.11.2009 – Daniel Magin

Alle Infos auf:  http://entwickler-akademie.de/codecamps/delphi-cc

Since Delphi 2006 there is a new Memory Manager in Delphi: FastMM4 – which is an Open Source project. That one has many advantages over the old BorlandMM. Especially for server-type applications (such as VCL for the Web / IntraWeb applications) FastMM4 is a must – many problems in IntraWeb applications have their source in the old MemoryManager, which is simlpy not designed to handle large numbers of objects being created and freed. I.e. you should download FastMM4 it if you are still on D2005 or older.

One thing that FastMM4 can help with is detecting Memory Leaks. This has been discussed on many blogs already (look for ReportMemoryLeaksOnShutdown := true;), this is really helpful and can even be configured.

Detecting Memleaks during Debugging is one important thing, but locating code that overwrites memory, or accesses objects that have already been freed is also very important. Consider the following code:

program Project20;

{$APPTYPE CONSOLE}

uses
  //Decomment to find memory errors
  //SafeMMInstall,
  SysUtils,
  Classes;

var
  sl: TSTringList;
  i: Integer;
  j: Integer;
begin
  ReportMemoryLeaksOnShutdown := true;
  try
    sl := TStringList.create;
    i := sl.Count;
    //Free Stringlist by purpose
    sl.Free;
    //...

    //Somewhen later - by accident - access a reference to a freed Stringlist
    j := sl.Count;

    //just do something ...
    if j = i then
      Writeln('j=i')
    else
      Writeln('j<>i');
  except
    on e: Exception do
      WriteLn(e.Message);
  end;
  ReadLn;
end.

It accesses a stringlist’s count property after it has already been freed. In complex Class hierarchies this is a situation that may easily happen.

Memleak detection is turned on, but with D2009 this code will run through just fine. There are possibilities to download  FastMM’s full version and tweak it’s config file to detect this situation.

An other option is to use an other Memory Manager, as Daniel pointed out: SafeMM, which is an Open Source project, hosted at Embarcadero’s CodeCentral. Just put “SafeMMInstall” as very first item into your projects uses clause and it will raise exceptions, every time you do something which would corrupt memory. Now recompile your project and let it run – you “error-free” application might unveil quite some errors now

Use SafeMM only for debugging purposes – it’s memory footprint is about 4x the normal one.

To register, you need to sign up for one of the “tutorial days” at DelphiLive! Registration The exact date (Wed or Sat) will be announced soon. (You may leave a note with your preference below)

VCL for the Web / IntraWeb Workshop

This Power Workshop starts with providing an overview of the available Web development tools for Delphi/C++ Builder. During the introduction the different approaches of WebSnap / WebBroker (Win32), ASP.NET (.NET) and IntraWeb will be explained. The differences between page- and application-oriented Web development will be discussed to finally introduce the Application Mode of IntraWeb.

The goal of this session is to learn the base skills to develop a complex Web application. Both strategies, starting from scratch or porting an existing Windows desktop application, will be taught.

Agenda

Part I

• The first Application
• Available components
• Deployment / Server Installation

Part II

• Session Handling
• Multi-Threading
• Multiple Form Applications

Part III

• RIA – Rich Internet Applications
• Ajax – Asynchrones Web
• JavaScript
• Dojo

Part IV

• Data Access
• Templates and Visual Form Inheritance
• (Reporting, Scaleability, Security)

Requirements

Basic skills in Delphi or C++ Builder are required. Examples are shown in primarily in Delphi, but depending on the attendee structure C++ samples can also be shown. Please bring your laptop. Delphi 5 or better should be pre-installed. IntraWeb can be installed with the help of the trainer.

Sie können einen einzelnen Tag buchen oder aber natürlich auch das ganze CodeCamp.

Entwicklung von Webanwendungen mit der VCL für das Web / IntraWeb

Dieser Intensiv-Workshop vermittelt den Teilnehmern zunächst einen Überblick über die verfügbaren Webanwendungs- Technologien in Delphi / C++ Builder. Dabei werden insbesondere WebSnap / WebBroker (Win32) und ASP.NET (.NET) gegenüber der VCL für das Web (IntraWeb) abgegrenzt. Es werden die Unterschiede zwischen Seiten- und Anwendungsorientierter Entwicklung dargestellt, um dann auf die Anwendungsorientierte Entwicklung mit der VCL für das Web zu fokussieren.

Im Vordergrund dieser Veranstaltung steht das Erlernen der notwendigen Kenntnisse, um eine komplexe Anwendung mit einem Web-Interface auszustatten. Dies kann entweder eine Neuentwicklung sein oder aber auch das Umstellen bzw. Erweitern einer bereits existierenden traditionellen Anwendung.

If you create IWRadioButtons dynamically, then also be careful that you always set their “Name” and “Value” properties to the same value – unless you know what you are doing. Value is important for correct control and group recognition during postbacks. Sounds odd but has to do with the way how the underlying INPUT HTML controls are working.

Unfortunately, at least in IntraWeb 9.0, IWRadioButtons synchronize Name and Value at design-time only (no idea why – I cannot remember having touched that during my time at Atozed). The attached IWComRadioButton source file fixes that, so that you only have to care about “Name”.

Note: That file is for IntraWeb 9.0. It may work with older or newer versions, but I did not test that. This is not an official file version, but just a personal contribution to the freely available visual control source files of IntraWeb. Use modified sources at your own risk – the guys at Atozed can support their own versions only.

Diesen Monat (vom 22. bis 25. September) wird die Entwicklerakademie wieder ein sogenanntes “Delphi Code Camp” in Mainz ausrichten. Es werden mehrere Ganztages-Workshops zu verschiedenen Delphi Themen angeboten. So werde ich unter anderem auch einen Workshop zum Thema Webentwicklung mit Delphi und IntraWeb/VCL for the Web leiten.

Nachfolgend der komplette Text zum CodeCamp:

Der Countdown läuft: In zwei Wochen startet das bisher größte Delphi Code Camp! Vom  22. bis zum 25. September präsentieren wir Ihnen diesmal in Mainz insgesamt sieben Workshops mit sechs der bekanntesten Delphi-Profis.

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Dieses exklusive Angebot gilt nur für ehemalige Teilnehmer des Delphi Code Camps: Für das nächste Camp erhalten Sie von uns 20% Sonderrabatt auf den Teilnahmepreis! Bitte melden Sie sich dazu ausschließlich mit dem Faxformular an und vermerken Sie darauf „ehemaliger Teilnehmer DCC – 20 % Rabatt“.

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Unter diesem Link finden Sie alle Details zum Delphi Code Camp.

Hier alle Themen der Workshops im Überblick:

Montag, 22. September

• Track Einstieg in Delphi – Objektorientierte Programmierung – Grundlagen für eine effiziente Anwendungsentwicklung mit Struktur – Daniel Wolf, Holger Flick

Dienstag, 23. September

• Track Internet – Entwicklung von Webanwendungen mit der VCL für das Web/IntraWeb – Olaf Monien
• Track System – Usability (Halbtägiger Workshop) – Daniel Wolf

Mittwoch, 24. September

• Track Internet – Protokolle, Web Services und Silverlight – Olaf Monien
• Track System – Windows Technologien mit Delphi nutzen – Daniel Wischnewski

Donnerstag, 25. September

• Track System – Multithreading mit Delphi – Bernd Ua
• Track Datenbank – Reporting mit RAD Studio/Rave Reports – Thomas Pfister

Am Dienstag und Mittwoch laden wir alle Teilnehmer des Delphi Code Camps herzlich zu den Abendevents der parallel stattfindenden BASTA!-Konferenz ein. Erleben Sie ein abwechslungsreiches Rahmenprogramm (bei Freibier!) und einmalige Gelegenheiten für Networking und Unterhaltung. Zusätzlich können Sie die Night Schools der BASTA! besuchen!

Bei Fragen, senden Sie uns bitte einfach eine E-Mail an info@entwickler-akademie.de oder rufen Sie uns an unter +49(0)69630089-0.

Often, certain errors such as missing images, non working JS files etc, pop up (i.e. customer calls and says “your Web app is totally broken”), and its very hard to determine whats happening. You could now add logging capabilities to your Web application and try to find out whats happening. That’s not a bad idea, but often it would help more to see what’s really sent over the wire, which resources fail to load etc.

Firefox: Firebug

For Firefox there is Firebug. Firebug is kind of a Swiss Army knife for all sorts of analyzing from within the Firefox Web browser. From JavaScript debugging, over JavaScript profiling, CSS and DOM explorer down to a network logger. For a nice introduction how to install and use Firebug see here.

The first thing you should always check with a faulty Web application is, if it loads all resources correctly. This can be done in the Network tab:

In this case the first two requests are answered by an HTTP 200 code, which means successfully loaded. The following request are all answered by HTTP 304, which means the resource has not been modified since the browser requested it last time. In other words these resources are cached.

Anytime there is an invalid request (wrong path, file does not extist), Firebug will mark that with an HTTP 404 response code, highlighted in red. This is very handy.

Internet Explorer: Fiddler

For IE there is Fiddler. Fiddler is a “debugging HTTP proxy”, which directly integrates with IE (but is not limited to). Once Fiddler is started from IE’s Tools menu, it willopen a port and automatically registers IE to use that as proxy location. (You can also register Firefox or any other browser to use that proxy) All subsequent requests will go through fiddler then, which generates well organized logs, like the following one:

This lets you drill down into the communication between your web browser and web server. For DOM or CSS inspection you would need an other tool though: Internet Developer Toolbar. And for JavaScript debugging you would need yet another tool: Visual Studio.

ServerController.ShowLoadingAnimation := false

If you are using IntraWeb’s PageMode then there is problem though: PageModus has no explicit ServerController.  Instead, an instance of TIWServerControllerBase is created when TWebModule is created. Inother words to change an option such as ShowLoadingAnimation you have to do that in your PageMode’s TWebModule:

uses

IWGlobal ...

procedure TWebModule1.WebModuleCreate(Sender: TObject);
begin
GServerController.ShowLoadingAnimation := false;
end;

Technically Atozed Software was a client of mine. I am runnning my own IT consulting business since 2004 and Atozed was one of my (bigger) clients since then.

After about 4 years of working with passion mainly on IntraWeb, which I still love and see as the best Web application framework for Delphi, I came to a point where technical innovation became more and more complicated with IntraWeb. Many new ideas were not easy to implement, as there are many road blocks because of historical reasons. A total rewrite would be a logical consequence, but that idea had no financially viable chance.

A while ago I got the offer to lead a totally new project. It was really a hard decision to take that offer and to discontinue my direct relationship with Atozed Software.

From August 1st, I’ll work on something new. It will be an exciting product and I’ll start blogging about this new project as soon as I have at least white papers and some early demos.

Don’t worry though!

My new project is still on Delphi, so I’m not going to leave the Delphi community.

I will continue to offer support and training for IntraWeb. If you need Delphi or IntraWeb assistance, on- or off-site, then just contact me.

I will cooperate with the IntraWeb Resource Center (IRC), which is a website offering support for Delphi Web application development. IRC is a place where you will find additional IntraWeb learning materials and information about IntraWeb support and training opportunities.

If you have a valid IntraWeb license and have support questions, then please see Atozed’s support options first. If you have specific support needs, which go beyond Atozed’s included options, then feel free to contact me or see the IntraWeb Resource Center. Individual support and training is available at hourly and daily rates.

My old location at blogs.atozed.com was originally meant to be a central place for all Atozed bloggers. For some reason I remained the only person using that blog space.

The blog engine used there is IntraWeb Studio a Content Management System (CMS) of Atozed Software. It works quite good, esp. for Websites, but for a blog I always found it a bit, well sluggish. To get a new post published or edited you have to fire up a special client.