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Have you ever come across a web application where it is slow to display a data table? The crawling performance is typical in any application that has a lot of data. The amount of data plays a big role in how fast a table will load. The root cause of a slow site is “over-fetching” data.

Pagination, also known as paging, is the process of dividing a…

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Another software pattern? Don’t we have enough patterns out there already? Please, hear me out. The purpose of this story is to make an introduction to the CAT (Clients- ApiResoures-TokenService) pattern to promote tightly integrated but loosely coupled modular software components.


For those who are into political science and programming, you can draw similarities between the US Federal Government and the CAT architecture pattern. Check this out.

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I have worked with Angular framework since version 2. Over the years, I figured that building robust security into Single Page Application (SPA) is complex and repetitive. If you are a developer who is looking for instructions to secure your Angular application using JSON Web Token (JWT), this story is for you.

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I have been searching for a Visual Studio template to generate a Clean Architecture ASP.NET Core REST API solution with boilerplate code for advanced features CRUD/Paging and apparatus Repository/Unit-of-Work, Dapper, SQLKata, Swashbuckle, and GenFu. Unable to find one, I decided to create the KissApi (Keep-It-Stupid-Simple Api) template and share it in the Visual Studio marketplace.

Overview of KissApi template

Developers can use the Visual Studio template KissAPI to scaffold a clean architecture REST API solution consisting of four projects

  1. Domain
  2. Application
  3. Persistence

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This is a multipart tutorial for implementing Token Service to secure Clients and API Resources using OIDC/oAuth2/JWT. The core technology includes

  1. IdentityServer4 + Admin UI
  2. ASP.NET CORE 3.1
  3. Angular 9+
  4. Azure Cloud (for a live demo)
  5. And many more

Who is this publication for?

  1. Angular/NetCore developers who are searching for a solution to secure your Client apps and WebAPI with JWT. You have spent weeks/months reading thru partial solutions scattered thru out the world wide web to figure out how the OIDC/oAuth2/JWT works.
  2. Developers who use Microsoft NetCore/Angular template to create a prototype and find it difficult to scale and deploy in real-world applications.
  3. Developers…

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I want to be in the cloud. Beam me up, Scotty!


On April 26, 2021, developer Jan Škoruba released IdentityServer4 Admin UI version 2.0.1 which supports ASP.NET CORE 5. In this tutorial, I will share the steps to deploy the Admin UI to Azure Cloud from Visual Studio 2019.

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Recently I published an Angular pagination/CRUD tutorial in Medium to demonstrate the use of a Master page for pagination and a Detail page for data editing. This approach may not be best for tracking the state of pagination/filtering on the master page. For example, if a user is on page 5 and selects a row for edit, how can the app know to return the user to page 5 on the mast page after editing?

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Oh crud! How to CRUD?

Scenario: Imagine you are a developer at a Fortune 500 company. Your new assignment is to build an Angular SPA that searches and updates employee position records. The backend database has 100,000+ records. The requirement is to create a responsive app accessible on desktop, mobile, and tablet. The technology stack is Angular and ASP.NET Core REST API.

Tutorial Content

In this tutorial, I will provide instructions to clone a complete, working, responsive Angular app from Github, set it up on the local, and walk-thru source code pertinent to CRUD. The task is divided into three parts:

I tested drive the Oracle Entity Framework Core 5 in a REST API project. It worked well. I wrote the tutorial and published source code in the story REST API with Oracle EntityFrameworkCore 5 -

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On February 11, 2021, the senior principal product manager at Oracle Alex Keh announced the release of Oracle Entity Framework Core 5. After seeing the news, I was wondering what would it take to wire up a C# REST API project to work with the new version 5.

Tutorial Content

The tutorial…

Fuji Nguyen

Software Engineer. Design and Build Angular, WebAPI, and DevSecOps Pipelines. Developer Experience (DX) Advocate and Opensource Contributor

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