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  • Entity Framework 4.1 Release Candidate Released

    - by shiju
    Microsoft ADO.NET team has announced the Release Candidate version of Entity Framework 4.1. You can download the  Entity Framework 4.1 Release Candidate from here . You can also use NuGet to get Entity Framework 4.1 Release Candidate. The Code First approach is available with Entity Framework 4.1.I have upgraded my ASP.NET MVC 3/EF Code First demo web app (http://efmvc.codeplex.com) to Entity Framework 4.1  version

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  • YouTube: How to Style an AngularJS App on the Device

    - by Geertjan
    I installed the Droid@Screen plugin into NetBeans IDE 8 so that you can see the Android device that I held in my hand while doing the demo below. The demo shows the usage of the Terminal window to create an Ionic Framework application (from "tabs", which is one of the cool templates that the framework provides), i.e., that means I can use AngularJS to create a Cordova application out of the box, with many mobile-oriented components available out of the box. Then I deploy the app to the Chrome browser on Android, which means I can interact with it in NetBeans, e.g., for CSS styling and JavaScript debugging. In this demo, I show how the background color of the deployed app can be changed live from NetBeans. After that, once I'm happy with the styling, I deploy the app again, but this time as a Cordova app, i.e., a hybrid HTML5 application, which means the app is packaged as a native app and deployed directly to the device from NetBeans. All of the above can be viewed here in about 4 minutes in this silent movie: Direct link to the (silent) movie: https://www.youtube.com/watch?v=isP5TNI3kYk

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  • Basic Defensive Database Programming Techniques

    We can all recognise good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.

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  • Updating an Entity through a Service

    - by GeorgeK
    I'm separating my software into three main layers (maybe tiers would be a better term): Presentation ('Views') Business logic ('Services' and 'Repositories') Data access ('Entities' (e.g. ActiveRecords)) What do I have now? In Presentation, I use read-only access to Entities, returned from Repositories or Services, to display data. $banks = $banksRegistryService->getBanksRepository()->getBanksByCity( $city ); $banksViewModel = new PaginatedList( $banks ); // some way to display banks; // example, not real code I find this approach quite efficient in terms of performance and code maintanability and still safe as long as all write operations (create, update, delete) are preformed through a Service: namespace Service\BankRegistry; use Service\AbstractDatabaseService; use Service\IBankRegistryService; use Model\BankRegistry\Bank; class Service extends AbstractDatabaseService implements IBankRegistryService { /** * Registers a new Bank * * @param string $name Bank's name * @param string $bik Bank's Identification Code * @param string $correspondent_account Bank's correspondent account * * @return Bank */ public function registerBank( $name, $bik, $correspondent_account ) { $bank = new Bank(); $bank -> setName( $name ) -> setBik( $bik ) -> setCorrespondentAccount( $correspondent_account ); if( null === $this->getBanksRepository()->getDefaultBank() ) $this->setDefaultBank( $bank ); $this->getEntityManager()->persist( $bank ); return $bank; } /** * Makes the $bank system's default bank * * @param Bank $bank * @return IBankRegistryService */ public function setDefaultBank( Bank $bank ) { $default_bank = $this->getBanksRepository()->getDefaultBank(); if( null !== $default_bank ) $default_bank->setDefault( false ); $bank->setDefault( true ); return $this; } } Where am I stuck? I'm struggling about how to update certain fields in Bank Entity. Bad solution #1: Making a series of setters in Service for each setter in Bank; - seems to be quite reduntant, increases Service interface complexity and proportionally decreases it's simplicity - something to avoid if you care about code maitainability. I try to follow KISS and DRY principles. Bad solution #2: Modifying Bank directly through it's native setters; - really bad. If you'll ever need to move modification into the Service, it will be pain. Business logic should remain in Business logic layer. Plus, there are plans on logging all of the actions and maybe even involve user permissions (perhaps, through decorators) in future, so all modifications should be made only through the Service. Possible good solution: Creating an updateBank( Bank $bank, $array_of_fields_to_update) method; - makes the interface as simple as possible, but there is a problem: one should not try to manually set isDefault flag on a Bank, this operation should be performed through setDefaultBank method. It gets even worse when you have relations that you don't want to be directly modified. Of course, you can just limit the fields that can be modified by this method, but how do you tell method's user what they can and cannot modify? Exceptions?

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  • Senior Developers vs. Junior

    - by huwyss
    I like the following quote which I found on codinghorror:[As Steve points out this is one key difference between junior and senior developers:] In the old days, seeing too much code at once quite frankly exceeded my complexity threshold, and when I had to work with it I'd typically try to rewrite it or at least comment it heavily. Today, however, I just slog through it without complaining (much). When I have a specific goal in mind and a complicated piece of code to write, I spend my time making it happen rather than telling myself stories about it [in comments].

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  • Throwing exception from a property when my object state is invalid

    - by Rumi P.
    Microsoft guidelines say: "Avoid throwing exceptions from property getters", and I normally follow that. But my application uses Linq2SQL, and there is the case where my object can be in invalid state because somebody or something wrote nonsense into the database. Consider this toy example: [Table(Name="Rectangle")] public class Rectangle { [Column(Name="ID", IsPrimaryKey = true, IsDbGenerated = true)] public int ID {get; set;} [Column(Name="firstSide")] public double firstSide {get; set;} [Column(Name="secondSide")] public double secondSide {get; set;} public double sideRatio { get { return firstSide/secondSide; } } } Here, I could write code which ensures that my application never writes a Rectangle with a zero-length side into the database. But no matter how bulletproof I make my own code, somebody could open the database with a different application and create an invalid Rectangle, especially one with a 0 for secondSide. (For this example, please forget that it is possible to design the database in a way such that writing a side length of zero into the rectangle table is impossible; my domain model is very complex and there are constraints on model state which cannot be expressed in a relational database). So, the solution I am gravitating to is to change the getter to: get { if(firstSide > 0 && secondSide > 0) return firstSide/secondSide; else throw new System.InvalidOperationException("All rectangle sides should have a positive length"); } The reasoning behind not throwing exceptions from properties is that programmers should be able to use them without having to make precautions about catching and handling them them. But in this case, I think that it is OK to continue to use this property without such precautions: if the exception is thrown because my application wrote a non-zero rectangle side into the database, then this is a serious bug. It cannot and shouldn't be handled in the application, but there should be code which prevents it. It is good that the exception is visibly thrown, because that way the bug is caught. if the exception is thrown because a different application changed the data in the database, then handling it is outside of the scope of my application. So I can't do anything about it if I catch it. Is this a good enough reasoning to get over the "avoid" part of the guideline and throw the exception? Or should I turn it into a method after all? Note that in the real code, the properties which can have an invalid state feel less like the result of a calculation, so they are "natural" properties, not methods.

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  • Google I/O 2012 - How to Build Apps that Love Each Other with Web Intents

    Google I/O 2012 - How to Build Apps that Love Each Other with Web Intents Paul Kinlan, James Hawkins Web Intents allows you to build applications that integrate with one another with an ease that has never been seen on the web before. In this session we will show you how to connect applications using Web Intents and how to best integrate with the many actions available in Web Intents such as editing, saving and sharing. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1394 15 ratings Time: 57:48 More in Science & Technology

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  • Google Top Geek E07

    Google Top Geek E07 In Spanish! Noticias: 1. Gráfico de conocimiento ahora en español y varios idiomas más. Totalmente localizado. 2. Nueva versión de Snapseed para iOS y Android. Gmail para Android y la versión 2.0 para iOS. Nuevo estilo para YouTube. 3. 500Millones de usuarios en Google+ y una nueva característica: comunidades. Las búsquedas de la semana y lo más visto en YouTube. Recomendamos Picket, una app para Android que funciona en México y te da la cartelera en cines. Noticias para desarrolladores: 1. Mejores mapas para apps de Android, nuevo API. 2. Una imagen dice más que mil palabras: Place Photos y Radar Search Ligas y más información en el blog: programa-con-google.blogspot.com From: GoogleDevelopers Views: 80 11 ratings Time: 18:09 More in Science & Technology

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  • Google I/O 2012 - Dart - A Modern Web Language

    Google I/O 2012 - Dart - A Modern Web Language Lars Bak, Kasper Lund The two creators of Dart will discuss the rationale behind Dart's design and its impact on web scalability and performance. They'll also present how Dart helps developers innovate by increasing their productivity without breaking backwards compatibility. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 2066 36 ratings Time: 01:03:40 More in Science & Technology

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  • Extension Manager in Visual Studio 2010

    One of the powerful aspect of Visual Studio is its ability to be extended and many people do that. You can find numerous extensions at the Visual Studio Gallery. The VSX team links to a 4-part blog series on how to create and share templates. You can also look find extension examples on the vsx code gallery.With Visual Studio 2010, you can search for items and install them directly from within Visual Studio's new Extension Manager. You launch it from the Tools menu:When the dialog comes up, be sure to explore the various actionable areas on the left and also note the search on the right. For example, I typed "MP" and it quickly filtered the list to show me the MPI Project Template:Others have written about this before me, just bing Extension Manager (and note that Beta2 introduced changes, some of which you can witness in the screenshot above). Comments about this post welcome at the original blog.

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  • Dartisans ep 12 - Dart + Web Components

    Dartisans ep 12 - Dart + Web Components Web Components are ushering in the "declarative renaissance" for modern web development. Watch this episode of Dartisans to learn how you can build Web Components with Dart, and compile them into JavaScript to run across the modern web. Learn more about Dart at www.dartlang.org From: GoogleDevelopers Views: 2 0 ratings Time: 46:17 More in Science & Technology

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  • SharpDOM, view engine for ASP.NET MVC

    Sharp DOM is a view engine for ASP.NET MVC platform allowing developers to design extendable and maintenable dynamic HTML layouts using C# 4.0 language. It is also possible to use Sharp DOM project to generate HTML layouts outisde of MVC framework.

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  • Do you know a good html mailing list management software with admin levels?

    - by SirG
    I'm basically looking for a program/app/script (can be commercial) which I can ideally install on a windows server (we can run asp, asp.net php mssql) we have different groups of people who send newsletters to web members, I want to bring it all into one app which I can monitor and control. Ideally it would be able to create html newsletters, (with some templates) track emails and click throughs. Manage email lists subscribe/unsubscribes. And importantly have different levels of admin, so a newsletter creator could log in and create and send off an email, it goes into a queue where a communications editor can have an overview of all newsletters and approve the sending of the emails or edit them before they are sent off. before I start coding something up myself I thought I'd ask if anyone has any advice! Cheers!

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