Noah Saunders

Noah Saunders


How to Build Your First Microservice with .NET

Build your first microservice with .NET

Microservice applications are composed of small, independently versioned, and scalable customer-focused services that communicate with each other over standard protocols with well-defined interfaces. Each microservice typically encapsulates simple business logic, which you can scale out or in, test, deploy, and manage independently. Smaller teams develop a microservice based on a customer scenario and use any technologies that they want to use. This module will teach you how to build your first microservice with .NET. In this episode, you will:

- Explain what microservices are.
- Know how various technologies involved in microservices are and how they relate.
- Build a microservice using .NET.

#dotnet #microservice 

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How to Build Your First Microservice with .NET
Einar  Hintz

Einar Hintz


jQuery Ajax CRUD in ASP.NET Core MVC with Modal Popup

In this article, we’ll discuss how to use jQuery Ajax for ASP.NET Core MVC CRUD Operations using Bootstrap Modal. With jQuery Ajax, we can make HTTP request to controller action methods without reloading the entire page, like a single page application.

To demonstrate CRUD operations – insert, update, delete and retrieve, the project will be dealing with details of a normal bank transaction. GitHub repository for this demo project :

Sub-topics discussed :

  • Form design for insert and update operation.
  • Display forms in modal popup dialog.
  • Form post using jQuery Ajax.
  • Implement MVC CRUD operations with jQuery Ajax.
  • Loading spinner in .NET Core MVC.
  • Prevent direct access to MVC action method.

Create ASP.NET Core MVC Project

In Visual Studio 2019, Go to File > New > Project (Ctrl + Shift + N).

From new project window, Select Asp.Net Core Web Application_._

Image showing how to create ASP.NET Core Web API project in Visual Studio.

Once you provide the project name and location. Select Web Application(Model-View-Controller) and uncheck HTTPS Configuration. Above steps will create a brand new ASP.NET Core MVC project.

Showing project template selection for .NET Core MVC.

Setup a Database

Let’s create a database for this application using Entity Framework Core. For that we’ve to install corresponding NuGet Packages. Right click on project from solution explorer, select Manage NuGet Packages_,_ From browse tab, install following 3 packages.

Showing list of NuGet Packages for Entity Framework Core

Now let’s define DB model class file – /Models/TransactionModel.cs.

public class TransactionModel
    public int TransactionId { get; set; }

    [Column(TypeName ="nvarchar(12)")]
    [DisplayName("Account Number")]
    [Required(ErrorMessage ="This Field is required.")]
    [MaxLength(12,ErrorMessage ="Maximum 12 characters only")]
    public string AccountNumber { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Beneficiary Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BeneficiaryName { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Bank Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BankName { get; set; }

    [Column(TypeName ="nvarchar(11)")]
    [DisplayName("SWIFT Code")]
    [Required(ErrorMessage = "This Field is required.")]
    public string SWIFTCode { get; set; }

    [Required(ErrorMessage = "This Field is required.")]
    public int Amount { get; set; }

    [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime Date { get; set; }


Here we’ve defined model properties for the transaction with proper validation. Now let’s define  DbContextclass for EF Core. core article core #add loading spinner in core core crud without reloading core jquery ajax form core modal dialog core mvc crud using jquery ajax core mvc with jquery and ajax core popup window #bootstrap modal popup in core mvc. bootstrap modal popup in core #delete and viewall in core #jquery ajax - insert #jquery ajax form post #modal popup dialog in core #no direct access action method #update #validation in modal popup

Eric  Bukenya

Eric Bukenya


.NET Conf 2020 Demos & Sessions for .NET 5 + Virtual Events!

This year’s .NET Conf was the largest one yet, with over 80 live sessions across three days that were co-organized and presented by the .NET community and Microsoft. On top of all of that, it also marked the release of .NET 5.0  that brings a full set of new capabilities, performance gains, and new languages features for developers to create amazing apps. If you missed this year’s .NET Conf live stream, don’t worry because we have you covered! core #c# conf foundation #community #demos

Tia  Gottlieb

Tia Gottlieb


What Is a Microservice Architecture? Why Is It Important Now?

We have been building software applications for many years using various tools, technologies, architectural patterns and best practices. It is evident that many software applications become large complex monolith over a period for various reasons. A monolith software application is like a large ball of spaghetti with criss-cross dependencies among its constituent modules. It becomes more complex to develop, deploy and maintain monoliths, constraining the agility and competitive advantages of development teams. Also, let us not undermine the challenge of clearing any sort of technical debt monoliths accumulate, as changing part of monolith code may have cascading impact of destabilizing a working software in production.

Over the years, architectural patterns such as Service Oriented Architecture (SOA) and Microservices have emerged as alternatives to Monoliths.

SOA was arguably the first architectural pattern aimed at solving the typical monolith issues by breaking down a large complex software application to sub-systems or “services”. All these services communicate over a common enterprise service bus (ESB). However, these sub-systems or services are actually mid-sized monoliths, as they share the same database. Also, more and more service-aware logic gets added to ESB and it becomes the single point of failure.

Microservice as an architectural pattern has gathered steam due to large scale adoption by companies like Amazon, Netflix, SoundCloud, Spotify etc. It breaks downs a large software application to a number of loosely coupled microservices. Each microservice is responsible for doing specific discrete tasks, can have its own database and can communicate with other microservices through Application Programming Interfaces (APIs) to solve a large complex business problem. Each microservice can be developed, deployed and maintained independently as long as it operates without breaching a well-defined set of APIs called contract to communicate with other microservices.

#microservice architecture #microservice #scaling #thought leadership #microservices build #microservice

Einar  Hintz

Einar Hintz


Microservices with ASP.NET Core 3.1

The Microservices architecture style is shown in the figure above. Microservices Architecture is a style in which one large application is developed as a set of small independent services. Here each service implements a specific functionality and has its own data store. Each service functionality should be small enough to implement just one use case and big enough to provide some value. Each service should be deployable separately so that it can be scaled independently. As far as possible these services should be independent of each other and if there is a need for inter-service communication then some lightweight communication protocol can be used.

Identity Provider is used to provide user authentication services to an application.

_To know details about Identity Provider & also to know about how to secure your ASP.NET Core based application you can check my series on _ASP.NET Core Security

API Gateway is a single entry point for all requests that help in managing the endpoints and coordinates with different services.

Container is a standard unit of software that bundles application or feature and all of its dependencies so that application can be deployed quickly and reliably on any new system that has container host.

Container Orchestration is a piece of software that is used to manage the life-cycle of containers in a large application. This helps to scale application on basis of the load.

Microservice is the actual small independent service which is bundled in a container along with it dependencies

Data Store is used to store microservice data and the basic principle is that each service manages its own data.

Monolithic v/s Microservices

MonolithicMicroservicesSingle service/application should contain all the business functionalitySingle service should contains only one business functionalityAll service are tightly coupledAll services are loosely coupledApplication is developed in one single programming languageEach service can be in different programming languageSingle database for all services.Each service has separate databaseAll services needs to be deployed together on VMEach service can be deployed on separate VMAll services run in same process so if one service goes down then whole application breaksEach service runs in different process so failure of one service does not affects other servicesDifficult to scale a particular service as new instance will have to have all servicesCan be Scaled easily as any single service can be deployed independentlySingle large team works on whole applicationSeparate small team work on each Service which are more focused.Simple to develop & test small applicationsAdd complexity to the application by the fact that its a distributed system

Why microservices with ASP.NET Core?

.NET Core provides following advantages which works for microservices

  • A light-weight framework built from ground up
  • Cross-platform support
  • Optimized for containerization

Implement Microservices with ASP.NET Core

Here we will cover in detail the step by step process to create microservice with ASP.NET Core. We will be creating an order service that will provide endpoints to Add, Cancel, Get Order By Id & Get Order(s) By Customer Id in the application. This demo has been executed in Visual Studio 2019 version 16.6.2

Create Service with CRUD operations

Create ASP.NET Core Project

For microservices demo we will be creating a ASP.NET Core 3.1 Web API project.

ASP.NET Core 3.1 API Project Creation

Implement Order Service

We will be creating order microservice which will contain functionality only related to orders. We will be implementing following endpoints

  • Add – To create a new order
  • Cancel – To cancel an existing order
  • GetById – Get Order by Id
  • GetByCustomerId – Get all orders for Customer Id

Below we will quickly add the entity model for Order & enable entity framework core for order microservice.

_If you need further details on how an entity framework works then check my other article on _Entity Framework Core in ASP.NET Core 3.1

Add Model

Add an order entity class

public class Order
    public string Id { get; set; }
    public string ProductId { get; set; }
    public double Cost { get; set; }
    public DateTime Placed { get; set; }
    public string CustomerId { get; set; }
    public string Status { get; set; }

#programming core core 3.1 core microservices #microservices

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