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Πρόσφατες Δημοσιεύσεις
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Gosh... I am so happy!!! I finally found......
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Been there done that... and I thought it......
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This is going to be the first post of a series of posts regarding ASP.Net and Entity Framework and how we can use Entity Framework to access the database. We will start with some simple samples but then we will look into more advanced uses of Entity Framework...( read more )...
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Internet Explorer 9 (IE9) has at last introduced a nice download manager, as shown below. This was long needed, since in IE8 there were cases were downloads with the same filename, when launched from different windows, could get corrupted. The download manager will also show resume download button when needed. IE8 could also resume downloads, [...]...
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Nice F# site, with edited material. More…...
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Angel Anger Danger Dancer Cancer Ancer (answer) Acer Cer (sir) "Sir 10" (certain) Have fun ;-) Dimitrios Staikos...
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I posted an article at CodeProject explaining how you can use Windows Azure AppFabric Cache (CTP) in your applications. You can find the article here -> http://www.codeproject.com/KB/azure/WA-AppFabric-cache.aspx Please let me know if you liked or not and of course any comments are more than welcome! Thank you, PK....
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Can you spot any difference at the following two Internet shortcuts on my desktop? I can’t either. Note that the two files have the same “name”, but different file extension (invisible when using default Windows Explorer folder view settings). The one uses “.url” (classic Internet Explorer webpage shortcut), while the other one, created by Internet [...]...
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Strange IE9 RC bug: visited http://www.vodafone.gr/portal/client/cms/viewCmsPage.action?pageId=0515 (via http://bit.ly/vodafone1kai1_xatzigiannis) and then clicked back several times seeing the above strange back/forward buttons (red color) and a Vodafone icon prefixed before them! Closing the window fixed the issue. Are they using some hidden feature of IE9? Didn’t manage to reproduce the behavior though. If you have more info [...]...
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In this post I will continue my series of posts on caching. You can read my other post in Output caching here .You can read on how to cache a page depending on the user's browser language. Output caching has its place as a caching mechanism. But right...( read more )...
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I am in a baaaaad mood today... Thank God I am not the *** administrator from hell. Or I might do this to a friend who left his workstation unlocked: Minimize all windows. Press PRINTSCREEN Save the image to disk......
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Πρόσφατα έκανα κριτική ανάγνωση (review) μιας προτεινόμενης δημοσίευσης για το συνέδριο ΤΠΕ-Ε 2011 (http://www.ekped.gr/?p=202), που είχε σχέση με την πρόσληψη της έννοιας του φωτός και της σκιάς από τα νήπια. Ανέφερε πως έχουν πρόβλημα να οπτικοποιήσουν νοητά το φως ως “ακτίνες” (όχι ότι είναι ακριβώς ακτίνες βέβαια, κύμα είναι) και τη διάδοση του. Σκεφτόμουν ένα [...]...
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The devil is in the details. Read the documentation of every library you use. Reason about your code. I have been recently refactoring and reviewing code of a project in order to move it from WPF to Silverlight. (I will make a series of posts on the trouble and horror that I met during this exercise) In this production LoB system we have chosen to work with Agatha , a request-response service layer sitting on top of WCF that simplifies communication with the back-end, greatly improves modularity and really helps with maintainability (you should definitely take a look in this project if you are serious about your service layer.) Building our messages (classes) for our layer I noticed that we have used interfaces where we needed collections i.e. IList, ICollection etc. It seemed a strange choice from the beginning and down the road but it actually proved terribly wrong. Suggestion : Always read the documentation. So the problem lies in the way WCF decides to serialize/deserialize a collection when we use interfaces...
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I have explained some of the state mechanisms that we have in our disposal for preserving state in ASP.Net applications in various posts in this blog. You can have a look at this post , this post , this post and this one .My last post was on Application...( read more )...
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I have explained some of the state mechanisms that we have in our disposal for preserving state in ASP.Net applications in various posts in this blog. You can have a look at this post , this post , this post and this one . I have not presented yet an...( read more )...
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This is the fourth post in a series of posts regarding ASP.Net built in membership functionality,providers,controls. You can read the first one here . You can read the second post here . You can read the third post here . In this post I will show you...( read more )...
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In this post we will explore the most practical ways of performing left outer joins in LINQ to Entities. The same principles applying to LINQ to Entities for EF 4 also apply to LINQ2SQL. This was not the case before EF 4 mainly due to the absence of the DefaultIfEmpty() method in the Entity Framework. In an case, in this post we focus on EF4. For our test we will use the following demo database/conceptual model: As you can see, Master records may have 1 or more Detail records and Detail records may have one or more DetailOfDetail records. Left outer joins are translated as follows: “Bring me all records/entities from the Master table along with their corresponding Detail records. The Master records should always exist in the result set even if there are no related records/entities in the Detail table”. The first approach is using the navigation property Details in the query as follows: from p in ctx.Masters.Include( "Details" ) select p Query1() method in the project This approach is the...
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This is the third post in a series of posts regarding ASP.Net built in membership functionality,providers,controls. You can read the first one post one here . You can read the second post here . In this post I would like to investigate how to use the...( read more )...
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This is the second post in a series of posts regarding ASP.Net built in membership functionality,providers,controls. You can read the first one post one here . In order to follow this post, complete the steps in the first post. It will only take 10 minutes...( read more )...
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I recently had a conversation with a client about the future of press and how digital magazines and newspapers are the future of the business. When we talked about that I had a few technologies in mind but nothing like Treesaver . Treesaver is a JavaScript framework for creating magazine-style layouts that dynamically adapt to a wide variety of browsers and devices. Both content and design is shaped with standards-compliant HTML + CSS and no JavaScript programming is required. It simply searches for the <article> tags and displays the content inside them , makes browsing them possible with prev-next buttons and auto-generates a "contents" menu. The JavaScript is under 25K gzipped (pretty important for mobile) and works with most modern browsers (degrades gracefully for others). Note to self: Keep that in mind, it might come handy...
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[Check here for the source code: http://cid-10e568adbb498dc8.office.live.com/self.aspx/Windows%20Phone%20Source%20Code/RSSReader.zip and here for the respective video: http://www.studentguru.gr/learn/default.aspx?category=21&id=171 ] In this post, we are going to show how to create a very very very simple RSS reader for Windows Phone 7 using Expression Blend and Visual Studio in 5 minutes, using minimal code. The RSS reader we will create will fetch the RSS feed using a direct URL (although this can be easily modified) and display them on our device (or emulator). Furthermore, the application will start by showing a simple animation. First of all, we start by creating a new Windows Phone application project in Expression Blend. Let’s call it RSSReader. We’re going to create a simple animation to serve as a “welcome screen”. Start by dragging and dropping a TextBlock onto the designer surface. Let’s make it write “Welcome”. We’ll then press F6 (or select Window-Workspaces-Animation) to go to the Animation workspace....
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After upgrading from Internet Explorer 8 to IE9 RC on my Windows 7 Ultimate, I right-clicked Command bar of IE9 RC (can show that bar by right clicking at the empty are on the right of the address bar and select it) and selected “Customize Toolbar”. It showed the following dialog: First thing I [...]...
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Just installed Internet Explorer 9 (IE9) Release Candidate (RC), found the link at: http://www.zdnet.com/blog/hardware/internet-explorer-9-rc-available-for-download/11349 Was amazed by it’s performance and clean GUI (especially the choice to move the yellow warning bar to the bottom and make it of smaller width than the browser window in order to be more noticeable). Do visit http://www.beautyoftheweb.com to explore [...]...
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I know that many of you were using eXpand modules for your XAF web applications for some time now and I want to thank you on behalf of the team for your feedback. However since now there wasn’t any official release for them from our team. We are happy to announce the release of the web version of our framework today. We have publish VS project item templates for web for both c# and vb.net. Also a web version of our featurecenter application comes along. As you see in the above image there is a Whats New section now for tracking new features. expandframework.com modules list has been enhanced with platform images so you can tell what platform each module supports 2 more web specific modules have been added (18. NCarousel, 19. Thumbnail), but to keep this blog short i am going to post later on them Control navigation menu options through model for both platforms Remember me feature for both platforms Control nested collections web visibility according to listview ViewEditMode model attribute How to auto-select the...
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