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In this post, I write about building an API to help me analyze real estate properties.
Continue readingIn this post, I show an example of scraping data in C# using HtmlAgilityPack. I come across HtmlAgilityPack because I need to get data from Zillow to analyze properties deals. I was able to scrape the data I want without much trouble using HtmlAgilityPack with a bit of XPath, LINQ and regular expression.
Continue readingIn the previous post about row level security in SQL server, I gave an example of reading a value from the database session context to feed into the security function for filtering data. In this post, I show examples of calling the sp_set_session_context store procedure from an ASP.NET core web API to store a value into the session context.
Continue readingIn this post, I’m going to share some of the issues, misunderstandings I ran into when trying to setup and deploy a WebJob alongside a web application using azure pipelines. The WebJob is a console application, and the web app is an ASP.NET core. Both the WebJob and web app target .NET 5.
Continue readingI have an API which needs to authenticate against azure ad to obtain an access token for calling another downstream API. When registering an application in azure AD for the caller API, I could either setup a shared secret or a certificate for the API to use as part of its credentials in a client credentials flow . In the past, I had always used a shared secret as it was more convenient and easier to setup. However, using certificate provides stronger security. After spending a few hours of googling and hacking, I was able to setup and use a certificate instead of a shared secret as credentials for the caller API to authenticate against azure AD.
Continue readingIn this post, I’m going to share my understanding of clean architecture after reading about it in the book “Clean Architecture” and other posts, as well as how I implement the clean architecture in an ASP.NET core project.
Continue readingIn this post, I share the three libraries I find useful for unit testing a .NET project: EF Core SQLite Database Provider, Bogus and Moq.
Continue readingConfiguration builders are mechanisms to retrieve connection strings from external sources. Using configuration builders, you may not have to do much codings besides installing packages and providing XML configurations for connecting to popular sources. In this post, I share with you my experience in using configuration builders for .NET to securely retrieve connection strings from an azure key vault. I’ll go over the setup and share some of the issues I face while integrating my app with azure key vault.
Continue readingIn this post, I outline some bits I have learned about .NET standard.
In this post, I talk about Delegate, Func, Action, anonymous methods and lambda expressions in C# and how they help with making the codes more concise and generic.