Programming Interview Questions and Answers: Entity Framework transaction scope examples. Transactions as a core building block of entity framework.
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.
Background. jQuery's replaceWith and using it to create a new insertion mode for Ajax update targets - Building Web Applications. This replaces the contents of the element, i.e. the DIV element itself is not replaced.
Sometimes it is useful or even necessary to replace a complete element, not only its children. For that we have jQuery's replaceWith method: 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.
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. I really didn’t feel like writing my own logic to validate my model against DataAnnotations and also didn’t want to write the logic to take into account that DataAnnotations might not be the current developers validation provider of choice.
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. 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.
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. "The fascinating, mind-boggling fact here is that you have this critical piece of network infrastructure that really runs a large part of the Internet, and there’s basically one guy working on it full time.