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Πρόσφατες Δημοσιεύσεις
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Note the page title says “Error 502 (Server Error)!!1” Tagged: Error 502, Errors, Google, HTTP, Server, YouTube...
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Αρκετές φορές έχω ερωτηθεί και έχω πει την άποψη μου για το τι είναι ANSI Transact SQL και τι όχι, όπως επίσης έχω πει και το πόσο ο SQL Server έχει δώσει βάρος στο να είναι κοντά στο ANSI. Όπως και να έχει όμως είτε θέλω να γράφω pure ANSI επειδή ενδεχομένως να θέλω portability είτε γιατί απλά είμαι περίεργος και θέλω να ξέρω αυτό που γράφω πόσο ANSI είναι , μπορώ το κάνω απλά χρησιμοποιώντας την < διαβάστε το άρθρο >...
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Όταν πρωτοκυκλοφόρησε το εκπαιδευτικό λογισμικό ΓΑΙΑ ΙΙ (το 2002) δεν υπήρχαν ακόμη τα Windows Vista και Windows 7, οπότε χρειάζεται μερικά παραπάνω βήματα από τα συνήθη η σωστή εγκατάσταση του. Πρόκειται για βήματα παρόμοια με αυτά που χρειάζονται για να εγκατασταθεί στα Windows Vista και Windows 7 το Αβάκιο / E-Slate μιας και αυτό χρησιμοποιήθηκε [...]...
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A reader of my recent article on a page faking YouTube design to lure you into subscribing for a pay-per-message you receive scheme for mobile phones, told me that they came across a very similar one by typing wikipdia.org instead of Wikipedia.org. I noticed that also typing gmial.com instead of gmail.com takes one to exactly [...]...
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In this post I will not be investigating at what some people call the “Windows single technology applications” which basically means that we build WinForms apps for the windows operating systems using only Windows Forms controls or alternatively build a windows WPF application using only the built-in or 3rd party WPF controls. ( read more )...
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A friend just called me this morning that their notebook with Windows 7 Starter started today showing the same icon for every Start menu item and for shortcuts (e.g. on the desktop) and when trying to open them the same program would always try to open them. Seems he had right-clicked and done “Open With…” [...]...
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Στα τέλη του προηγούμενου έτους μας ήρθαν αλλαγές στο τμήμα: ο εώς πρόσφατα διευθυντής, Patrick Malone, μετακόμισε στη διεύθυνση του M&O (Marketing & Operation) της Microsoft και τη θέση του θα αναλάβει η Ελένη Ραχανιώτου που προέρχεται από το...
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A lot has been going on for the past couple of months that prevented me from keeping this blog up to date, so I feel it’s time to do some catching up and let you all in on some of the cool things that I’ve been involved with since my last post back in September. This is going to be an ongoing list that’s going to be updated as soon as posts get published, so stay tuned for updates.. September 2011 Build Windows Conference October 2011 ArabGames 2011 Info System November 2011 Annual Digital Dialogue Microsoft 2011 PaoBC Azure Deployment ITProDevConnections 2011 CloudCom International Conference Azure Presentation December 2011 AskADev intervew Three day Azure Workshop Azure Web Camp...
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One of the questions I always got when presented Windows Azure “..is there a way to auto scale our windows azure based services?” with the answer being that unfortunately one will have to build its own custom logic for that at least till Wasabi is released. Well the wait is over, the final release of the Enterprise Library Integration Pack for Windows Azure is now available, according to the blog post, “Announcing the Enterprise Library Integration Pack for Windows Azure with Autoscaling, Transient Fault Handling and more” , which posted last Friday to Microsoft Senior Program Manager Grigori Melnik’s “Thoughts on Agile Software Engineering and Beyond” blog. According to the blog post, this release includes a comprehensive set of technical content, including: Two new application blocks: Autoscaling Application Block (“Wasabi”) to help you to automatically scale both web and worker roles in Windows Azure by dynamically provisioning/decommissioning roles or throttling. Transient Fault Handling Application Block...
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This is a post relevant to all the developers out there that use Web Forms as their main ASP.Net platform. In this post I would like to talk about ViewState and how we can move it and store it in a session on the server's memory. We know that the default...( read more )...
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In my seminars I always show how to fetch data from an SQL Server database to some UI controls (usually a GridView control). I use the connected data access model,I use the disconnected data access model (datasets) and obviously I provide samples that...( read more )...
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In this post I would like to show you again with a hands-on example how to create an Ajax enabled WCF Service and invoke it using the Ajax Script Manager web server control. This is going to be a very simple example and it is for people who are not familiar...( read more )...
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Πήγα και εγώ χθες στην εφορία μου κι έλαβα τον κλειδάριθμο για να πιστοποιήσω το λογαριασμό που είχα από παλιότερα (στο παλιό TAXISnet) – έδωσε και νέο password όπως μου ζήτησε και μπήκα να δώ τι καλούδια έχει. Φαίνεται ενδιαφέρον (απ’ότι κατάλαβα πλέον τα βιβλία θα τα κρατάμε ΜΟΝΟ ηλεκτρονικά), αλλά έχει τα bug-άκια του [...]...
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LINQ is .NET Language-Integrated Query . It's included in .NET Framework 3.5 and you can use it in Visual Studio 2008 projects. XPO has officially supported LINQ since v7.3 and since then we have continued to improve and support it. Nowadays LINQ to XPO is very mature, extendable ( How to: Implement Custom Functions and Criteria in LINQ to XPO ) and powerful ( Free Joins ). In the latest version we make it even easier to use LINQ to XPO since we only distribute one assembly, DevExpress.XPO.dll, which includes everything! (custom providers as well). XPO can talk transparently to a large list of database systems . It was already possible to make complex queries using our standard criteria syntax , however using LINQ offers some great advantages. No magic strings, like you have in standard criteria syntax, Intellisense support making it easier and faster to construct your queries, Compile time checking, Learning to write LINQ queries/lambdas is a must learn for .NET developers, The benefits are clear, however there...
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In this post I would like to show you with a hands-on example how to invoke a WCF service from JQuery . I have already posted a few posts regarding JQuery and server communication.Have a look in this post and in this post . This is a similar post . In...( read more )...
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This is the second post in the new HTML 5 post series. You can find the first post about HTML 5 input form elements and validation here . In this post I would like to show you how to use audio and video.We all know that audio and video are everywhere...( read more )...
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Just a quick post to wish all of you out there in the community a very Merry Christmas and a Happy New Year! I thought I had better take some time out from all the usual revelry to thank you all for making our framework what it is right now. Now is the season of generosity and goodwill so it's a good time to reflect on what has been achieved at eXpand through the giving of ideas. Of course my biggest Christmas wish is that communication and collaboration between us all in the online community is increased a thousand times more! Let's all make a New Year's resolution to work together and take our framework to the roof! MERRY XMAS!...
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I am going to start a new series of posts that focus on HTML 5. HTML 5 is something I wanted to learn and finally I have covered enough ground to feel confident. HTML 5 gives us things like Semantic tags, the possibility to add video and audio in our...( read more )...
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There are many solutions on the net for avoiding the null check. Here is mine: public interface Option<T> { } public struct Nothing<T> : Option<T> { } public struct Just<T> : Option<T> { public readonly T Value; public Just(T value) { Value = value; } } public static class OptionExtentions { public static Option<T> ToOption<T>(this T value) { return (value == null) ? new Nothing<T>() as Option<T> : new Just<T>(value); } public static U Select<T, U>(this Option<T> option, Func<T, U> func) where U : class { return option.Select(func, () => null); } public static U Select<T, U>(this Option<T> option, Func<T, U> whereJust, Func<U> whereNothing) where U : class { return option is Just<T> ? whereJust(((Just<T>)option).Value) : whereNothing(); } } And implementation return from h [...]...
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While I was trying to visit twitter I suddenly was faced with this page, which although very well designed looked immediately suspicious to me, first of all because of the redirects I noticed happening at the address bar and also because the landing URL was using the word “rewardz”. Moreover the page seems to be [...]...
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I guess you know the classic pop song "Who’s That Girl" from Madonna: When I came across the following “You need to log in to read this article” page at NewScientist, I had a feeling of Déjà vu Indeed, it was the same hard to miss pretty face from the home page of a remote [...]...
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In one of my previous posts (appox. a year ago) I have demonstrated how to bind to IEnumerables in ASP.NET MVC. I have shown several ways of dynamically adding/removing elements from the list through the use of Javascript and then jQuery-templates. In that post I have used the traditional ASP.NET MVC literals <% %> and of course the whole site operated in HTML4 and jQuery. Today a lot of things have changed. From HTML4 we are moving to HTML5, we start using CSS3 for our styles, we use Razor for our views in ASP.NET MVC and we can take advantage of the knockoutjs library that has managed to bring the world of MVVM patterns closer to the world of Javascript and it did it with some impressive results. Therefore, in this post we are going to re-implement the same project adopting all those new (or not so new) great technologies. We need to implement a simple site where we have a list of clients with a first and last name and we need to give to our users the ability to manage that list (insert/remove/edit...
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If you type help IF at the Windows 7 command-line (can launch this by searching at Windows Start menu search box for “Command” or by typing cmd there and pressing ENTER), you get in one of the help pages printed out for the batch files’ IF command: %ERRORLEVEL% will expand into a string representation of [...]...
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At 11.00 PST on Thursday 15th December I will be appearing live on Scott Hanselman ’s podcast Hanselminutes . During the course of the show Scott and I will be discussing eXpand framework and its relationship with XAF . Please tune in and show some support for your favorite frameworks! We built this thing together guys and this is an exciting event for all of us....
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In these series of posts I am going to have a look into the various factors that make our web applications slower and how we can rectify that. Ι have already blogged about caching in this blog and you can find these blog posts below Caching an ASP.Net...( read more )...
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