Recently, I have often had to use the well-known Visitor pattern. I used to ignore this pattern and thought that it simply complicates the code. In this article, I will share my thoughts about this pattern. We will talk about pros and cons, as well as what tasks it helps to solve and how to simplify its use. The code will be in C#.
During numerous discussions about the applicability of the Repository pattern, I noticed that people are divided into two groups. In this article, I will call them abstractionists and concretists. The difference between them is in the way they treat the pattern value. The former believe that a repository is worthwhile, as it allows disregarding details of data storing. The latter suppose there is no way to disregard these details, therefore, the concept of repository makes no sense and its usage is a waste of time. The dispute between these two groups usually turns into a Holy War. (more…)
Imagine that you want to convert your system from one state to another. The initial state is when DateTime is used everywhere, both in C# code and in the database. The final state is when DateTimeOffset is used everywhere. You want to make the transition smooth and make as few changes as possible. This description can be the beginning of a very interesting problem with a dead end at the end.
During the development of reporting forms, a user wanted to see the process of data loading from the database. He wanted the timer to start running after hitting the button, and as strings were received, their number was displayed on the form. I needed to implement this within an existing ASP.NET project. (more…)
In this article, I am going to provide you with a working solution that allows you to have a single dependency container (IoC container) during the whole query life cycle, as well as to control its creation and disposal.
Such a simple topic as type conversion would seem to be unworthy of the whole article. In C#, there is a suitable operator “(T)value” and types that implement it. So, this topic may be considered as closed. However, for 14 years of .NET existence, BCL developers and other programmers have come up with other four ways to convert value types.
I write this tutorial primarily to demonstrate how to quickly create a simple application with support for npm, Webpack, and TypeScript based on an initial ASP.NET Core application template (which will run debugging from Visual Studio).
When I was programming in C#, I used to send all recursive tasks to an unmanaged C code, since the .NET performance was problematic. And now, looking back at my past experience, I think of the benefits of such code division. Do I really benefit from it, and if yes, how much? What is the best way of building API with such approach? (more…)
Due to the fact that in my company, Solr was chosen as a full-text search platform, there appeared a strong desire to simplify the work with Solr queries using LINQ expressions.
Having surfed the Internet for alternatives, I came to the conclusion that at the moment I do not have the required library to be publicly available. The maximum I managed to find is a very partial implementation of Solr.NET queries (and the skeptic comment of the author himself).
C# is a multi-paradigm programming language. Recently, the course has been set towards new functional constructions in C#. We can go further and add other extension methods that allow writing less code without ‘climbing’ in the F# territory.