ASP.NET News from Blogger:
K. Scott Allen
Total News: 521
Microsoft unveiled Windows 8 at the //build/ conference in September. Since then I've spent time seeing how to put together Windows 8 metro applications with HTML and JavaScript. The Sublime The fo...
The HTML 5 DOM interface for a video element allows you to get the underlying video's width and height in pixels, but, be careful not to ask for the dimensions too early. If you ask as soon as the DOM...
The canonical example for fluent configuration with the Entity Framework is to take a few simple entity definitions: public class Product
{
public int Id { get; set; }
public string Name { ge...
In the last post we looked at feature detection with Modernizr. Before moving forward, let me answer a few questions that came up. First, you can build a custom Modernizr download containing only th...
From Wikipedia: The tragedy of the commons is a dilemma arising from the situation in which multiple individuals, acting independently and rationally consulting their own self-interest, will ...
As we saw in a previous post, Modernizr allows you to work with the new HTML 5 elements, like nav, and still support browsers that don't know anything about a nav, or HTML 5. However, HTML 5 is more...
Modernizr.js is a little library that will help "modernize" old browsers. As an example, let's say you create a new ASP.NET MVC 3 application with the "Use HTML 5 semantic markup" checkbox selec...
When I was making the switch from C and assembly to C++ I did quite a bit of reading on object oriented programming. It's hard to find material on OOP that doesn't praise the classical pillars of enca...
Imagine (or dream) that you have some IronRuby code to execute. require 'net/telnet'
host = Net::Telnet.new(:Host => 'localhost')
#...
#...
#...
return data
One way to execute the code and c...
The second part of my C# fundamentals course is available for subscribers on Pluralsight.com. Part 2 introduces you to the variety of programming styles supported by the C# language. At its core,...
Someone asked about the circular div I used for magnification in an earlier post. There are no primitives in CSS for building arbitrary shapes, but like most things on the web, that doesn't stop anyon...
Magno is a something I put together because well, just because. The idea is to provide a magnifying lens effect using a background image and background position animation. The lens tracks the positio...
2 column layouts are rather popular on the web, and there are 1,001 ways to make them work. The approach you choose really depends on the type of content you have, and how you want images and backgrou...
mouseleave is simple to understand: Bind an event handler to be fired when the mouse leaves an element, or trigger that handler on an element. How hard could it be? http://jsfiddle.net/JP6aV/ $...
Liam told me about Underscore.js some time ago. From the home page: Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would exp...
From the Clojure home page: Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system. Clojure is predominantly a functional programming language, ...
Victor Brumble is writing code again, and this time he's writing a jQuery plugin. His plugin makes alert boxes easy, because Victor loves pointless, model dialogs. (function ($) {
var settings ...
It's easy to make a DOM element draggable and droppable with jQuery, but it's not as obvious how to make it stop. It turns out every widget includes a set of standard methods, and one of the standard ...
Using Alt+Ins in the Solution Explorer window is one of those ReSharper shortcuts that probably saves me hours over the course of a year (Alt+Ins is the "Create File From Template" command). There i...
Several people have asked me about using data annotations for validation outside of a UI framework, like ASP.NET MVC or Silverlight. The System.ComponentModel.DataAnnotations assembly contains everyth...
This post is a play on Phil's "A Better Razor Foreach Loop". If you aren't familiar with templated delegates in Razor, you can follow the links in Phil's post. Something I don't like to see in a v...
workplace [n] - a place where work is done Over the years I've worked with developers in cubicle farms and private offices, in open spaces and cloistered bureaus. And once there was a basement room a...
If you want to simulate an exception from an IQueryable data source, be careful about when the exception is thrown. As an example, let's use the following interface. public interface IContext
{
...
I like Kzu's take on building unit-testable domain models with EF code first. I've been playing around with some of the same ideas myself, which center around simple context abstractions. public int...
One of the interesting side-effects of installing ASP.NET MVC 3 is the appearance of Microsoft.Web.Infrastructure in the GAC. Inside the assembly is a DynamicModuleUtility class that will let you do t...
QUnit is an easy to use testing framework* for an easy to test language. Once you've downloaded the library you can load up an .html page with all of your scripts, and the boilerplate qUnit HTML: &l...
The validator we looked at in the last post only supports server side validation. To support client side validation we need a little more code on the server, and some custom client script. One appro...
Let's say you want to create a GreaterThan validation attribute and use it like so: public class Trip
{
[Required]
public DateTime StartDate { get; set; }
[Required]
[Gr...
Ive seen the HTML helpers in ASP.NET MVC drive developers to madness. For example: @Html.ActionLink("Detail", "Detail", "Car", new { id = 5 })
... produces ...
<a href="/Home/Detail?Lengt...
Just like web form views, razor views dont build when you build an MVC project in Visual Studio. By default, the parsing and compilation of a view doesnt happen until runtime, meaning you might not kn...
The charting sample I wrote years ago rendered image tags like this: <img id="topDestinations" src="roller.gif" />
The roller gif was a spinning animation that let the user know some work...
Once upon a time I wrote an article titled Charting with ASP.NET and LINQ. At the time I used a combination of WebForms, WCF, the Microsoft AJAX libraries, and the Microsoft chart control. I had some ...
If you ever have a stack overflow using Html.Action or Html.RenderAction in a Layout view, then check the return type of your child action. public class Weather : Controller
{
public ActionResu...
Even today there are those of you who doubt the power of the var keyword in C#! Or rather, there are those of you who steadfastly refuse to use it. I think the var keyword provides a nice symmetry f...
Symmetry in code is valuable, and often subtle. When I find symmetry in code, I feel it's a positive sign that the design is working well. I like temporal symmetry. When something opens at the very ...
We'd have cheerleaders, fans, and of course . . . reporters to write about it all. V-TPS Team Defeats Milestone 6 in Overtime Ken Hoethlisberger came out of the project war room with a huge smile a...
I went to a general store, but they wouldn't let me buy anything specific. - Steven Wright. One of the challenges of working with a general purpose programming language (like C#) and a general purpo...
Programming koans liberally borrow from Zen Buddhism to teach programming. If you look around the Internet, you'll find koans to learn Ruby, koans to learn functional programming, and thanks to Liam M...
Charles F. Kettering was an engineer, founder of Delco, and the head of research at General Motors for 27 years. I ran across a few choice quotes from the man. A problem well stated is a problem hal...
Unlike refactoring, a "big code rewrite" bulldozes an entire application and starts over from scratch. Is it ever the right thing to do? In a recent post, Steve Blank says no - never for start u...
If I come across this code: if (widget.Price < 10.0m && widget.UnitsInStock > 100)
{
// ...
}
Then the first thing I'll suggest is refactoring to:
if (widget.IsElig...
Empirical studies on software refactoring are hard to find, but I believe refactoring follows the 80/20 rule - 80% of the possible benefit comes by applying just the first 20% of effort. Like most wor...
A measurement consists of a high reading and a low reading, but the high and low values are optional. We also need to add measurements together, so the following C# code: var m1 = new Measurement(low...
One of the advantages to using a custom IFilterProvider is how you gain total control over the instantiation of action filters in ASP.NET MVC 3. When you combine an IoC container with a filter provide...
In MVC 3 you can implement an IFilterProvider to create and feed action filters to the MVC runtime. Assuming you have the configuration classes in place from the last post, you can create a custom fil...
ASP.NET MVC 3.0 introduces global action filters - an easy way to apply an action filter to every action in an MVC application. All you need to do is register the filters during application startup: ...
ASP.NET MVC has action filters, while ASP.NET has HTTP modules. Inside their respective processing pipelines, these abstractions serve similar purposes, and I've heard the following question a few t...
You can change the base class of a Razor view in ASP.NET MVC using an @inherits directive. @inherits MyWebViewPage<dynamic>
The default base class for a Razor view in ASP.NET MVC is WebViewPag...
MonoDroid allows you to write Android applications using C# and Visual Studio. Compare the code in the last post to the following: [Activity(Label = "My Activity", MainLauncher = true)]
public cl...
I really like IntelliJ IDEA - and the free community edition now supports Google Android development. Part of the reason I like this IDE is because it feels familiar. I've learned the JetBrains sense...
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