29 04 2011
Here’s one little method I use to write out debug information when investigating some new (legacy but new to me) system. Usually I remove this method later when I know how code works. It’s maybe not the best way to debug things but it works like charm in many situations.
28 11 2010
Pex and Moles is new testing and code analysis technology that is created by Microsoft Research. Pex is powerful tool that helps you analyze your code, detect error situations and generate parameterized unit tests. In this posting I will give you quick and illustrated overview of Pex.
2 11 2010
I needed a quick’n’dirty way to inspect objects returned from external source. I wrote simple object properties dumping mechanism you can use to investigate unknown objects. It is really quick and really dirty.
23 09 2010
Sometimes we need publisher/subscriber messaging in our applications to broadcast messages to different parts of system in real time. We can always build our own solution for this but we can also use something that is already there. In this posting I will show you how to use MemBus to send messages from MDI parent […]
21 09 2010
I made quick comparison of performance of four DI/IoC containers. I measured Unity,Castle Windsor, StructureMap and Ninject in two scenarios – resolving objects with empty constructor and resolving object with injected parameters in its constructor. Results are here.
14 09 2010
In my last post Find out how long your method runs I introduced how to measure the speed of code using actions. In this posting I will make a step further and give you some ideas about how to create easily measurable code units and how to build measurable scenarios of them. As a foundation I use simplified versions of patterns like Command and Unit of Work.
14 09 2010
During my large database experiment I wrote simple solution for paged queries that I can use in my repositories. This far my experiments have shown pretty good results and I think it is time to share some of my code with you. In this posting I will show you how to create paged results using NHibernate and Entity Framework based repositories.
12 09 2010
I am making some experiments with large database and different O/R-mappers. To make it easier for me to measure the time that code takes to run I wrote simple command class that uses Stopwatch class and measures how long it takes for action to run. I this posting I will show you my class and explain how to use it.
9 09 2010
Lists and their performance has been hot discussion topic for years. I have seen many examples and read a lot of stories about List class and I made conclusion that there is too much pointless opinions about it. In this posting I will show you how List performs when adding elements to it and how it works internally. Be prepared for interesting discussion!
28 08 2010
Today I worked out simple application side object locking solution for one server scenario. My motivation came from ASP.NET architecture forum thread How to solve concurrent site issue where one user asks for locking solution that works without changing database. Here is my simple and primitive solution that should help this guy out. I added also sample solution to this posting.
30 05 2010
In one of my community projects I needed to output some listings as Excel file. As installing Excel to server is non-sense that I was easily able to avoid I found simple solution for Excel 2007 files – open-source project called ExcelPackage. In this posting I will show you hot to create simple event attendees report in Excel 2007 format using ExcelPackage.
29 05 2010
28 05 2010
Validating collections before using them is very common task when we use built-in generic types for our collections. In this posting I will show you how to validate collections using code contracts. It is cool how much awful looking code you can avoid using code contracts.
22 05 2010
When you are using new tools that make also something at code level then it is good idea to check out what additions are made to code during compilation. Code contracts have simple syntax when we are writing code at Visual Studio but what happens after compilation? Are our methods same as they look in code or are they different after compilation? In this posting I will show you how code contracts look after compiling.
21 05 2010
In my last posting about code contracts I showed how code contracts are documented in XML-documents. In this posting I will show you how to get code contracts documented with Sandcastle and Sandcastle Help File Builder.
20 05 2010
One nice feature that code contracts offer is updating of code documentation. If you are using source code documenting features of Visual Studio then code contracts may automate some tasks you otherwise have to implement manually. In this posting I will show you some XML documentation files with documented contracts. I will also explain how this feature works.
12 05 2010
In my last posting about code contracts I introduced you how to force code contracts to classes through interfaces. In this posting I will go step further and I will show you how code contracts work in the case of inherited classes.
9 05 2010
It is possible to define invariant code contracts for classes. Invariant contracts should always hold true whatever member of class is called. In this posting I will show you how to use invariant code contracts so you understand how they work and how they should be tested.
9 05 2010
Sometimes we need a way to make different implementations of same interface follow same rules. One option is to duplicate contracts to all implementation but this is not good option because we have duplicated code then. The other option is to force contracts to all implementations at interface level. In this posting I will show you how to do it using interface contracts and contracts class.
6 05 2010
Code contracts and unit tests are not replacements for each other. They both have different purpose and different nature. It does not matter if you are using code contracts or not – you still have to write tests for your code. In this posting I will show you how to unit test code with contracts.