Category: Software development

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Knockout JS mappings

Knockout JS is a JavaScript library for creating MVVM JavaScript libraries. In a previous post I already showed some of the cool features of Knockout. http://marcofranssen.nl/knockout-that-cascading-dropdown/ If you want to spike your knowledge on Knockout a little more first, please visit Knockout’s documentation. In this article I want to zoom in on the Knockout mapping plugin. The Knockout mapping plugin enables you to easy map your JSON object into an observable JavaScript object. So here is a short example of what you’ll be able to do with it. So when you do an ajax request and receive a JSON result you can for example do the following. 12345678910111213141516var viewModel;// result could look like this: "{ "personId": 1, "firstName": "Marco", "lastName": "Franssen", "age": 26, "webpage": "http://marcofranssen.nl", "twitter": "@marcofranssen" }"$.ajax({ url: 'http://somewebpage.net/getPerson' type: 'GET', dataType: 'JSON', success: function (result) { var data = JSON.parse(result); viewModel = ko.mapping.fromJS(data); ko.applyBindings(viewModel, $('#person').get(0)); }, error: function (result) { //handle the error, left for brevity }});

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Windows Phone Theme colors

When developing Windows Phone apps I love to use the theme accent colors in my apps. Since there are some new theme colors in Windows Phone 8 I started searching for their color codes. Lucky me I found them on msdn.aspx#BKMK_Implementation “Theme for Windows Phone”). Now you may be thinking how to use the colors in your own Windows Phone apps. The Color object doesn’t contain a color called Emerald. So I created a small class to help me out with this issue. First of all I created a small static helper method to convert the hexa colors to a color object. So we are able to put in the hexa color string and the function returns a color for us. 123456789public static Color FromHexa(string hexaColor){ return Color.FromArgb( Convert.ToByte(hexaColor.Substring(1, 2), 16), Convert.ToByte(hexaColor.Substring(3, 2), 16), Convert.ToByte(hexaColor.Substring(5, 2), 16), Convert.ToByte(hexaColor.Substring(7, 2), 16) );} Then I made some properties that caches the colors for us on their first use. The Color properties looks like this.

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Secure your web app fluently

When building a big web application with ASP.NET MVC 3 I ran into a problem to secure my web application in a maintainable way. There are lots of examples with attributes, but this isn’t maintainable. So I started searching for other solutions, however most of the information is leaning on those un-maintainable attributes I finally found “Fluent Security“. What does Fluent Security offer you? Fluent Security provides a fluent interface for configuring security in ASP.NET MVC. No attributes or nasty xml, just pure love. Go get it on NuGet! What does that mean? Well it simply means you can bootstrap your security just from your Application_Start() and maintain it on a single place. Besides that you can easily unit test your security setup. So you can test if your security configuration matches the security setup you described in your unit tests. This is a huge advantage because you know for sure the controller actions are secured the way you like it without having the need to click through your complete web application. You can only fail when not defining your tests correctly. That’s not all… You can easily extend, modify etc. by adding your own implementations of the interfaces. Let me start to show you some code so you see for yourself how easy it is! My example is based on a default MVC 3 application and I have added a CategoryController like below to have some extra actions for my example.

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Sokoban 7

Sokoban 7 is a classic puzzle game, the first version of Sokoban was published in 1982. Now it is also available on Windows Phone. The game includes 50 levels and will gain periodic updates with new l

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Delegate your equality comparisons

When using Linq on your Entity Framework objects, you often need to distinct your query results. Therefore you need to implement an IEqualityComparer for the more advance scenario’s. For example if yo

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Minesweeper 7

Today will be again a milestone for me. Today my first Windows phone app “Minesweeper 7” got certified. This app is just a port of a minesweeper version I made once with winforms. It is very basic and

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Pitfall in FakeItEasy

The current project I’m doing is a CQRS based project, using the ncqrs framework. Today I came to a phase I needed some mocking done for some of my domain services. I choose FakeItEasy to handle this

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Some notes on the DDD/CQRS Course

In this blog post I work out some of the notes I made in Greg Young’s DDD/CQRS course in Krakow Poland. In Domain Driven Design there are some important things to think about. In DDD we make a differe