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Πρόσφατες Δημοσιεύσεις
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Windows Azure Web Sites (WAWS) is a powerful hosting platform provided by Microsoft on Windows Azure. One of the coolest features is that you can run your Web Sites/Web Apps pretty easily and it’s not limited to ASP.NET but it also supports PHP. Also on database level it’s not only SQL databases (MSSQL) that are [...]...
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I’ve managed to combine http://www.codeproject.com/Articles/85603/A-WPF-custom-control-for-zooming-and-panning and a cut-down version of it for Silverlight that was out there: http://www.codeproject.com/Articles/167453/A-Silverlight-custom-control-for-zooming-and-panni I did it in a way that the Silverlight version is source-code compatible with the WPF version (via a WPF compatibility layer that even implements value coercion), so that both the WPF and the Silverlight projects share [...]...
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If you get an error like: Unhandled Error in Silverlight Application Code: 2153 Category: InitializeError Message: Failed to load a platform extension. Possibly corrupt or invalid file: … when you try to launch your Silverlight application (especially if you have the project set to use an autogenerated test page), you should read: http://forums.silverlight.net/t/185747.aspx/1 In my [...]...
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System.IO.IsolatedStorageSettings doesn’t exist in WPF (only in Silverlight) but can easily be ported from Mono project’s Moonlight implementation (the Moonlight project home is at http://www.mono-project.com/Moonlight), as suggested at: http://groups.google.com/group/wpf-disciples/browse_thread/thread/4ed6c009f3fb7d69 I found that implementation at the following URL: http://vega.frugalware.org/tmpgit/moon/class/System.Windows/System.IO.IsolatedStorage/IsolatedStorageSettings.cs Did some modifications to IsolatedStorageSettings.cs to make it work with WPF (whether the application is deployed via [...]...
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Πρόλογος Αυτό που με εξιτάρει περισσότερο στην δουλειά μου και στην ενασχόληση μου με τον SQL Server είναι να βρίσκω λύση σε προβλήματα, αλλά και σε ποιον δεν αρέσει αυτό; Το Πρόβλημα Σήμερα ένας συνάδελφος στην εταιρία που εργάζομαι έρχεται με το εξής ερώτημα-πρόβλημα «Έχω ένα πίνακα και έχω φτιάξει μια stored procedure η οποία περιέχει ένα business logic αρκετά σημαντικό και περίπλοκο με το οποίο κάνω insert στον συγκεκριμένο πίνακα. Θέλω να κάνω insert στο συγκεκριμένο πίνακα μόνο από την συγκεκριμένη stored procedure και μόνο πως μπορεί να γίνει αυτό;» Στην αρχή ξαφνιάστηκα καθώς ο συνάδελφος είναι εμπειρότατος και η ερώτηση του μου φάνηκε κάπως. Του απάντησα ότι αυτό είναι στο χέρι του καθώς αυτός γράφει τον κώδικα. Φυσικά η απάντηση μου δεν τον ικανοποίησε. Έτσι μετά από μια σύντομη συζήτηση κατάλαβα τι ακριβώς ήθελε να κάνει το οποίο τελικά ήταν: «Έχω ένα πίνακα και έχω φτιάξει μια stored procedure η οποία περιέχει ένα business logic αρκετά σημαντικό και περίπλοκο με το οποίο κάνω insert στον συγκεκριμένο...
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Εισαγωγή Για άλλη μια φορά σήμερα ευλογώ τον Θεό που μου έχει δώσει την δυνατότητα να κάνω αυτή την δουλειά καθώς μου δίνει την δυνατότητα σε τακτά χρονικά διαστήματα να μαθαίνω κάτι νέο. Αυτό που έμαθα σήμερα κατά την καθημερινή μου ενασχόληση με τον SQL Server θα ήθελα να το μοιραστώ μαζί σας και είμαι αρκετά χαρούμενος για αυτό καθώς το αγαπημένο μου προϊόν ο SQL Server μου χαρίζει αυτές τις συγκινήσεις. Η ανάγκη Ας έρθουμε όμως στο ζουμί. Σαν DBA ή DB Dev καθημερινά γράφεις queries. Αρκετές φορές μέχρι κάποια πάνε σφαίρα κάποια πάνε αργά και γενικά είσαι μέσα σε μια ατέρμονη διαδικασία τα αργά να τα κάνεις να πάνε γρήγορα και τα γρήγορα γρηγορότερα. περισσότερα...
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Copying here my answer at: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/11a42336-8d87-4656-91a3-275413d3cc19 What seems to work for me is the following (copying from the source code of http://ClipFlair.codeplex.com [currently under development]) note I’m using Build Action = "Page" and Custom Tool="MSBuild:Compile" at the properties of Themes\DropDownTheme.xml and Themes\RotateHorizontalTheme.xaml, as was for Themes\Generic.xaml. Seems to work OK (probably this is faster at [...]...
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I was testing Windows Azure Web Sites (Codename Antares, for short WAWS) for about 3 weeks before it was announced two days ago at MeetWindowsAzure. Since the beginning I wanted … Continue reading →...
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Just came across http://wangmo.wordpress.com/2007/09/27/themesgenericxaml/ which gave me a hint on why a WPF control wasn’t getting instantiated correctly when loaded from an external assembly (dll): to load generic.xaml for WPF, at the start of Properties\AssemblyInfo.cs you need (note this isn’t used/needed in Silverlight): using System.Windows; and at the end of Properties\AssemblyInfo.cs you need: [assembly: ThemeInfo( [...]...
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Just added an issue to CSpeex project – http://cspeex.codeplex.com/workitem/18209 – with some fixes to make it compile for Silverlight 4 RC and higher (was for Silverlight 4 Beta), however still have issues with it not working correctly. Tagged: Audio, Capture, Codec, Demo, Silverlight, Speex, Webcam...
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In this post I would like to about a new feature in SQL Server 2008, namely Policy-Based Management.With this new feature DBAs can enforce policies to an instance of SQL Server or many instances of SQL Server they are responsible for. Most DBAs have to administer many SQL Server instances.It is not efficient to configure and manage them separately.DBAs try to enforce standards (e.g naming standards) on the instances they manage but it is very difficult to enforce them. ( read more )...
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I was watching once again The zen of async: Best practices for best performance talk of Stephen Toub ’s on //Build and I decided I should blog about how easy is to end up with a deadlock while writing asynchronous code with new C# 5.0 language features (AKA async/await). Here is the quick background first which I was aware of before I watch this talk. The talk that Toub has given was mostly about how you create better reusable libraries with asynchronous language features but there are lots of great information concerning application level code. When you are awaiting on a method with await keyword, compile generates bunch of code in behalf you. One of the purposes of this is to handle synchronization with the UI thread. The key component of this feature is the SynchronizationContext.Current which gets the synchronization context for the current thread. SynchronizationContext.Current is populated depending on the environment you are in. For example, if you are on a WPF application, SynchronizationContext.Current...
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To sum up the discussion at http://stackoverflow.com/questions/1360113/is-java-regex-thread-safe/, you can reuse (keep in static variables) the compiled Pattern(s) and tell them to give you new Matchers when needed to validate those regex pattens against some string: import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Validation helpers */ public final class Validators { private static final String EMAIL_PATTERN = [...]...
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Using Microsoft Web Platform Installer (aka WebPI), one can easily install WordPress on IIS (together with PHP and MySQL database engine. Btw, better install the latest PHP version from there and remove any older ones. Also do install from there the Windows Cache Extension for PHP for the version of PHP you’re using. Windows Cache [...]...
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Εισαγωγή Αν και δεν είμαι αρκετά σίγουρος ότι όλοι έχουν καταλάβει ότι θα πρέπει να αποφεύγουν όπως ο διάολος το λιβάνι τα implicit conversions εντούτοις αυτό είναι κάτι γνωστό και πηγή δεινών αν αυτό γίνεται στην T-SQL. Υπάρχουν αρκετά άρθρα που το αναφέρουν αυτό και με αυτό το post θα συμπληρώσω και εγώ ακόμα ένα παράδειγμα με σκοπό μήπως και κάποιοι συνετιστούν και σταματήσουν να το κάνουν. Αυτό το post αποφάσισα να το γράψω μετά από ένα πραγματικό γεγονός που έγινε σε πραγματικό περιβάλλον εργασίας και το οποίο δημιουργούσε αρκετά προβλήματα. Για να γίνει κατανοητό αυτό ας έρθουμε να δούμε ένα παράδειγμα και για αυτό το λόγο ας έρθουμε να φτιάξουμε μια βάση με ένα πίνακα που θα παίξει το ρόλο του πειραματόζωου και θα είναι ένας πίνακας πελατών όπου η απόφαση που έχουμε είναι να υπάρχει το ΑΦΜ σαν σημείο αναφοράς για το record άρα και primary key. Σε αυτόν θα βάλουμε 10.000 rows. Όλα αυτά μπορούν να γίνουν με τα παρακάτω script περισσότερα...
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In this post I would like to demonstrate with hands-on examples how to use automation (jobs,alerts,operators,notifications) in SQL Server to automate SQL Server administration tasks. The importance of automating tasks is profound.The following tasks could be automated Backing up the database Checking data integrity Dropping and re-creating indexes Transferring data (read more )...
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April was devoted to improving our continuous integration process. I am happy to announce that eXpand now has a dedicated build server. Many of you already notice its availability in our main download page, the rest are welcome to explore it and get access to all our builds and tests! Teamcity is a great integration platform and for sure will make our dev life easier. Please do not forget to say a big thanks to Dima Janzen since he is our CI guru! Latest Collaborations Import wizard It is now fully localized! (Big thanks one more time to Martynas Dauciunas ) Master Detail Controls Disappearing (see http://goo.gl/M9s2g ) Modifications in logic module To avoid exceptions when view is dashboard (see http://goo.gl/dL8kZ ) Modification in core web module GridViewOptionsModelSynchronizer incorrectly clears the grid's StatusBar template (see http://goo.gl/eev8H ) As always big thanks for raising your questions and reporting bugs!...
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Copying from MPPVE (formerly RCE) documentation: …might indicate that WCF is not correctly configured. To resolve the WCF issue The error returned is a “HTTP Error 404 – Not Found”. This might be due to an issue with the WCF scriptmaps registrations. To solve this issue: Open a command line console as Administrator Browse to [...]...
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Yesterday I had the chance to speak about windows azure at a Microsoft Azure camp event. People seemed very exited and stayed till late in the evening asking questions, writing code and publishing services to the cloud. Attendees also showed great anticipation for the spring release, and the future of the platform. So when I saw the announcement of the Meet Windows Azure online event this morning I thought “…damn missed that for a day, I could have let everyone know yesterday about the release date” Anyway this is something that you should not loose, register now and find out what’s the future of Microsoft’s cloud platform....
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In this email I will demonstrate in detail how to set up Database Mail.I am sure that this feature is well documented elsewhere in the web but I decided to give it a go. Database Mail is a very useful feature.Both the Maintenance Plan Wizard and Maintenance Plan Designer have the ability to send e-mails to DBAs. We can use the SQL Server Management Studio to set up Database Mail. ( read more )...
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In this post I would like to explain with some hands-on examples how to create a partitioned table in SQL Server and then manage the partitions. I know there are samples of how to do that in BOL,MSDN and elsewhere but I thought that it would be a good idea to give it a try with hands-on examples. Many people have found useful my style of posting. They feel they can follow the steps and master the technology/topic. ( read more )...
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Five years ago my primary hard disk failed taking some of my precious data like family pictures, videos, personal files and code away for ever. I was able to recover some but had to pay a hefty fee to the service guys. After the “ melt down incident ” I’ve decided to keep triplicates of my data to 2 more disks to avoid this from ever happening again. Setting this up though was quite a pain since I use a laptop and I’m constantly on the move, so I had to remember to sync everything the minute I got home to avoid losing anything. From time to time I considered moving my data to the cloud to avoid all the hassle and worries of syncing the data but to also be able to access those from where ever I was . There were a couple of services I’ve looked at but two things were keeping me from going through with this, the price , and the trust (not that someone would steal my data – who would care about my children photos after all, but what happens if the company is sold, closes, its hardware fails and so on). Microsoft’s...
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One of the challenges any company faces when developing multi tenant applications based on Windows Azure is how much will the tenant be charged for the services offered. The problem is more apparent in cases where the customer is not charged with a fixed monthly rate but according to the service usage (pay as you go model). Till today one had to manually track and monitor service consumption in order to be able to establish each tenant cost and adjust the billing accordingly. Today though the Azure ISV team in DPE announced public availability of Cloud Ninja Multi-Tenant Metering Block (CNMB) . CNMB enables SaaS ISVs to meter tenant-level consumption of various Windows Azure resources such as bandwidth, storage, SQL Azure, and compute . CNMB provides tenant-level meters, application level aggregates, rich query model based on OData, extensibility to implement customer meters. It comes with out-of-box meter providers for bandwidth, storage, SQL Azure, and compute. In future CNMB will add providers for Tomcat and...
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In this rather short post I would like to explain the concept of collation in SQL Server. This is a concept that stills confuses SQL Server DBAs and developers. I know that is a well documented feature (in books & the web) but I will give it a shot. ( read more )...
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