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Programming Interview Questions and Answers: Entity Framework transaction scope examples. Transactions as a core building block of entity framework.

Programming Interview Questions and Answers: Entity Framework transaction scope examples

The DbContext object which we heavily use for interacting with the database uses transactions internally without you having to do anything extra. In case you need to manually provide transaction support, here is how you can do it. In this post, I cover three cases in which transaction scope is being used to show rollback when an error occurs during an update of multiple entities:when you have multiple save calls to the context;when you have single save with multiple object; and transactions across multiple contexts. Let’s first review our simple model and context object. To re-create this project, use Visual Studio 2010 console project with Entity Framework 5.0 RC bits from nuget.

Using System; using System.ComponentModel.DataAnnotations; namespace EFTransactionsDemo.Model { public class Product { public int Id { get; set; } [Required] public string Name { get; set; } [Required] public DateTime DateAdded { get; set; } } } Knowledgebase - activePDF Technical Support. Canvas Fireworks. Creative CSS3 Animation Menus. Sample App with Backbone.js and Twitter Bootstrap. Backbone.js is a lightweight JavaScript framework that provides the basic infrastructure (Model, Collection, View, and Router classes) to bring structure to your Web applications.

Sample App with Backbone.js and Twitter Bootstrap

Twitter Bootstrap is a UI toolkit that provides simple and flexible HTML, CSS, and Javascript to implement popular user interface components and interactions. In other words, Backbone.js and Twitter Bootstrap focus on different areas of your application: core architecture and user interface respectively. Because of their well-defined and non-overlapping scope, Backbone.js and Twitter Bootstrap work well together. In general, I find a lightweight architectural framework and a UI toolkit to be a powerful combination, and an interesting alternative to full-stack frameworks: it gives you the flexibility to choose the library you like (if any) in the respective areas of your application. The Sample Application You can run the application here.

Twitter Bootstrap highlights. Performance and the Entity Framework. Introduction If you are using the Entity Framework (EF), then you need to understand the best practices for improving its performance, or you will suffer the consequences! Background My team has spent almost 2 years with the first version of the Entity Framework in an enterprise application (including the beta). Our application has a Service Oriented Architecture (SOA) that uses the .NET 3.5 Framework SP1, SQL Server 2008 and IIS 7.0 on Windows Server 2008.

jQuery's replaceWith and using it to create a new insertion mode for Ajax update targets - Building Web Applications. Custom MVC ModelBinder with Complex Models/Objects/Interfaces using built in MVC Validation. I’ve been creating some cool stuff using ASP.Net MVC 3 lately and came across a situation where I’d like to have quite a complex model/object bound to an Action on my Controller based on a set of posted values from a form.

Custom MVC ModelBinder with Complex Models/Objects/Interfaces using built in MVC Validation

In order to do this, a custom ModelBinder is necessary to collect the data from the posted values, turn it into my custom object, and bind that object to my Action’s parameter. The easy part is to write code to turn the posted values into my custom object and return it, the tricky part is trying to get the in-built back-end MVC validation working for my model… which is currently using DataAnnotations. Powerful New CSS- and JavaScript-Techniques (2012 Edition) Advertisement Since our last round-up of useful CSS techniques1, we’ve seen a lot of truly remarkable CSS geekery out there.

Powerful New CSS- and JavaScript-Techniques (2012 Edition)

With CSS3, some of the older techniques now have become obsolete, others have established themselves as standards, and many techniques are still in the “crazy experimentation” stage. Since the release of the previous post, we’ve been collecting, sorting, filtering and preparing a compact overview of powerful new CSS techniques. Today we finally present some of these techniques. Use them right away or save them for future reference. Please note that many techniques are not only CSS-based, but also use HTML5 and JavaScript. Table of Contents CSS Transitions And Animations CSS transitions and animations are often used to make the user experience a bit more smooth and interesting, especially when it comes to interactive effects on hover or on click. CSS3 dodecahedron9 A fancy dodecahedron experiment, created using CSS Transforms and a tiny JavaScript snippet. Last Click. Coding Horror.

K. Scott Allen. In software development we face many constraints, and we usually think of constraints as bad things that make our jobs miserable.

K. Scott Allen

If we had no constraints, we’d build beautiful software with impeccable error handling because there would be no errors. In one of my first jobs I wrote firmware for lab devices. Each device had a 32kb ROM for program storage, and those 32kb of memory constrained the type of software I could create, and the tools I could use. Article Archive. Smashing Magazine. New addtions to the 1,000+ jQuery Plugins Directory. Scott Hanselman. Open Source is hard. Security is hard There's been lots of articles about the recent OpenSSL "Heartbleed" bug. You can spend a day reading all the technical analysis, but one headline that stood out to me was "OpenSSL shows big problem with open source; underfunded, understaffed. " A fundamental part of the fabric of The Internet Itself is mostly just one person plus a bunch of volunteers.