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Πρόσφατες Δημοσιεύσεις
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As promised in the previous post I will now attempt to provide a concise yet comprehensive look at the 5 possibilities that Xpand gives us when we want to create a calculated member. I will also provide discussion of the relative advantages and disadvantages of each approach. We can see all of them in action in Xpand FeatureCenter application. Remember it is only thanks to the fact that XAF/XPO have such a strong and flexible architecture that this is possible! We must also acknowledge that these approaches have evolved as a direct result of contributions from the XAF team and community. 1. The XPO way –>Using Code Take a look at the CreateCalculabeMember extension method in the code below, public class CreateRuntimeCalculatedFieldController : ViewController { public override void CustomizeTypesInfo ( DevExpress . ExpressApp . DC . ITypesInfo typesInfo) { base . CustomizeTypesInfo (typesInfo); XPClassInfo...
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http://sqlschoolgr.wordpress.com/2011/09/19/tod-using-hotmail-account-with-sql-server-db-mail/...
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In the next couple of days I’ll be reading and reviewing Neil’s book. Neil is a fellow Windows Azure MVP and judging from what I’ve heard and read up to this point, this is probably going to be a very nice book not that I expected anything less from him. You can find the book [...]...
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http://sqlschoolgr.wordpress.com/2011/09/16/tod-enable-aero-theme-on-windows-server-2008-r2-windows-7-when-open-them-with-rdp...
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Recently in Xpand forums Dionisis Soldatos raised a question about how unbound columns can be implemented with XAF . Unbound columns along with their UnboundExpression can be used for creating calculated fields even at runtime. Since we are talking about unbound grid columns it should be obvious that we will operate at the UI level by modifying the grid control columns. However lets do a deep dive inside XAF model to extend it as needed! The Model By now we are all used to XAF providing us with excellent out of the box solutions which negate the need for us to write hundredths of lines of code. This of course means money saved during developing and ultimately your product hits the market faster. Why spend time reinventing the wheel when the XAF team have already done the hard work for you? XAF creates the model by reading the metadata of our classes, this model has 3 types of view. One of these is the ListView which can be displayed with data source enabled controls like Grid controls. ListView has columns which...
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http://sqlschoolgr.wordpress.com/2011/09/16/using-instant-file-initialization-with-sql-server/...
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Install Windows 8 in VirtualBox Requirement: Oracle VM VirtualBox Windows 8 Developer Preview ISO file (32-bit or 64-bit) Windows Live ID* (for best testing experience, sign up here if you doesn’t have one) Internet Connection* * Nice to have, for best experience Besides that, also make sure that your computer have the Virtualization Technology (VT-x/AMD-V) activated in the BIOS. Proceed to the installation if you are ready with everything. Steps: 1. Get the Oracle VM VirtualBox installed in your PC. (VMWare player is not working but you can use VMWare Workstation 8, released two days ago just for Windows 8.) 2. For setting up the Virtual Machine, use the following settings: 3. Below screenshots show all the settings I used for that Virtual Machine: System It is important to have the chipset to PIIX3 and to check the Enable IO APIC as the installation will fail. Display Storage This part is easy. The .vdi will be mount as an IDE Controller and all you need to do is to right click on the IDE Controller and "Add...
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Πάει καιρός, από τον Μάιο, που έχω να γράψω στο blog μου. Αυτό είναι το πρώτο post ύστερα από τόσο καιρό και πλέον πολλά πράγματα έχουν αλλάξει! Κατ’ αρχήν, μια μεγάλη προσπάθεια που ξεκινήσαμε τον Ιανουάριο του 2010 έφτασε στο τέλος της και πλέον στην οικογενειά μας είμαστε τρεις καθώς αποκτήσαμε τον Οδυσσέα! Αν υπάρχει [...]...
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Today Windows Azure SDK 1.5 and Windows Azure AppFabric SDK 1.5 were released, fixing issues and bugs detected during the beta. There are also some new enhancements to it: Re-architected emulator, which enables higher fidelity between local and cloud developments. Support for uploading service certificates in csupload.exe. A new csencrypt.exe tool to manage remote desktop [...]...
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Yesterday I have watched the Keynote speech presenting to developers around the world the new Windows8 development ecosystem. And in my opinion the basic idea on what is going to happen, which programing skills we need to master and what we can carry with us from the .net world is summarized in the following basic figure: In this figure with light-blue we have the “old” paradigm and with light-green the “new” one. And as I see it in this “new” era XAML is there, C# is there and also HTML5 and JavaScript are now more “natively” supported, being two more than welcome additions to the picture. So if I tried to summarize the awaited change I would say: a new underlying API (WinRT) that understands more developers and provides richer functionality out-of-the-box along with a big set of new UI interaction ideas at the hands of the developer. Of course there are hundreds of features in this new ecosystem for the developer to harness and master but this for me is the general...
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In this post I would like to talk about the great support that JQuery has for Ajax.I have already written another post on my blog regarding the Jquery Ajax functions and how we can get data form the server.In that post we looked into how we can use the...( read more )...
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I recently received a promotional e-mail from an e-shop I mainly use to buy home appliances in Greece that was really funny: at the top offer there was a TV, but although the e-mail had been just sent (judging from its date/time stamp) the image already had a mark “exhausted” on it. Obviously it was [...]...
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After getting some proper rest during my summer holidays and reading quite a few books (once again) I decided that I should publish my list of all time favorite books which I will continuously update from now on. I am a big fan of physical books and I try to buy my favorite books in physical form so that I can have them all in my room's shelves. The last years though I try to also read e-books as they are cheaper and easier to have with me. I am a big fan of apple books and kindle on iPhone although I have to admit that I would be more happy with a bigger screen. I might give a shot to the real Kindle in the future although I am not sure it's worth the money against an iPad. On the other hand, reading pdfs on my pc get's me soooooooo sleepy, I have never managed to finish a single book like that. I have two simple rules that i try to follow when reading books: read at most two books per month and read them from start to end. Read ALL of them! The last one is an old rule that a friend of mine taught me from my...
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A new book on discovering and understanding the Microsoft .NET 4 Framework has special meaning to our community. Real World .NET 4 and C# is a collaborative project created by real-world experts—in fact a whopping 15 MVPs contributed to its making. Each MVP wrote a chapter, drawing from a particular area of expertise to provide valuable information on using various .NET 4, C# 4, Silverlight 4, and Visual Studio tools in real world applications. They cover topics such as Windows Presentation Foundation, Silverlight 4, Windows Communication Foundation, ASP.NET performance, and the entity framework. Here’s an inside peak at the contents: ASP.NET and jQuery, by C# MVP David Giard ASP.NET Performance, by Visual Basic MVP Bill Evjen Ethical Hacking ASP.NET, by Sharepoint MVP György Balássy How to Build Real-World Silverlight Applications, by Silverlight MVP Gill Cleeren Silverlight: The Silver Lining for Line-of-Business Applications, by Silverlight MVP Jeremy Likeness JumpStart …., by Silverlight MVP Daron Yondem MVVM...
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This another post that is focusing on how to use JQuery in our ASP.Net applications. If you want to have a look at the other posts related to JQuery in my blog click here We always wanted to have eye-candy web applications and since the first web pages...( read more )...
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If you liked the IT Pro | Dev Connections 2010 ... get ready to upgrade to version 2011! The technical community of Greek IT professionals, autoexec.gr , in cooperation with the relevant community of developers, dotNETZone.gr , are joining forces once again and will present an event with five parallel catting edge technical tracks ! The event is exclusively focused on professionals and developers who don’t want to lose time in presentations of products with information that can be found on the Internet. I’m also going to participate in the event with a talk which is going to be titled “ The Producer(s) - the most outrageous $1.000.000 scheme in the annals of... Windows Azure” Here’s a small teaser of where the idea came from (more will follow) Looking forward to seeing you there at the 26th and 27th of November 2011 in the Educational Centre of the National Bank of Greece !...
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I recently came across a very useful Microsoft tool (FCIV) that can compute and store (as XML) checksums (MD5, SHA1 or both hashes) of folders/files you want and can also be used to later on verify the checksum lists to see if they’ve been tampered with. Would be nice to have a GUI wrapper around [...]...
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I own a Lenovo IdeaPad S10-3t and I’m pretty satisfied with it (apart from the glossy screen and the bevel border arround the touchscreen that doesn’t allow you to easily touch near the screen edges – and would much prefer a NVidia GPU instead of Intel Graphics Accelerator which doesn’t support WDM1.1 btw [keep on [...]...
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In version 11.1.7 our team now provides workflow instance support outside XAF borders! With a few lines of code, it is now possible to store our workflows in any of the 14 database systems described in this post . Durability is a key benefit of the Workflow Foundation and it is based on the ability to store a running workflow instance on the fly at almost any time. To this end Microsoft workflow team implemented the SqlWokflowInstanceStore class. Using this class and a few lines is possible to store workflow instances in SQL Server as shown, // Define SqlWorkflowInstanceStoreBehavior: // Set interval to renew instance lock to 5 seconds. // Set interval to check for runnable instances to 2 seconds. // Instance Store does not keep instances after it is completed. // Select exponential back-off algorithm when retrying to load a locked instance. // Instance state information is compressed using the GZip compressing algorithm. SqlWorkflowInstanceStoreBehavior...
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Δεν ξέρω πόσοι το αντελήφθησαν, αλλά την προηγούμενη εβδομάδα βγήκε ανακοίνωση από τη Microsoft (και πιο συγκεκριμένα από την ομάδα του SQL Native Client) που δήλωσε ότι η εταιρία αποφάσισε να επικεντρωθεί στην ODBC και σταδιακά να εγκαταλείψει...
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In this post we are going to extend the functionality of the workflow module . to create a UI that will help us to schedule workflows. Some of you may recall that we looked at using a Delay inside a While activity in Working with CRUD activities – Short Transactions. Recently, DX-Squad member Martin Praxmarer raised an interesting question relating to this topic: I have the requirement to do a workflow which starts each day on 6 clock - searches for orderdocuments where a specific date is less then X days. I know I will do an do while loop, but workflow definition has 2 options, start when new object, start when criteria, so when do i start this Workflow? In order to achieve this we will use the WorkFlow demo that ships with our framework. The first thing is to design our custom ScheduledWorkflow persistent object by implementing IWorkflowDefinition. We didn’t derive it from the existing WorkFlowDefinition object because it has properties like TargetObjectType and start up conditions. public enum StartMode { ...
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In this post I will talk about Ajax again.This time we will use an extender to ajaxify our application.I am going to use the AutoCompleteExtender extender together with a textbox. Inside the extender control I will call a web service (a service method...( read more )...
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In this post I would like to talk about Ajax history in ASP.Net applications and how it works.The problem with ASP.Net Ajax applications is that the browser's back and forward buttons do not store the history of the page. The browser recognises only URLs...( read more )...
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H ομάδα μου και εγώ προσωπικά αναζητούμε F# hacker. Για περισσότερες πληροφορίες στείλτε μου PM. "Είμαστε μια μικρή ομάδα έμπειρων F# προγραμματιστών και αναζητούμε νεαρό ταλαντούχο hacker για να δουλέψει μαζί μας σε ένα πολύ ενδιαφέρον και φιλόδοξο F# based cloud programming framework-runtime ( M-Brace ). Αν και οι γνώσεις γύρω από F# και .Net δεν είναι απαραίτητες, απαιτείται τουλάχιστον καλή γνώση και εμπειρία σε κάποια functional γλώσσα (Lisp family, ML family, Haskell, Erlang, FP Scala) καθώς και πάθος-όρεξη για applied functional programming. Για περισσότερες πληροφορίες και για αποστολή βιογραφικών [email protected]"...
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In this post I would like to talk about the various Ajax features-functions available to us when incorporating JQuery into our applications.We are going to investigate how we can use those JQuery Ajax functions to get data from the server. This post will...( read more )...
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