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Routing in React.js Single Page Application using React-Router-Dom 03 Nov 2020
The compositional pattern of the React.js library makes Single Page Application (SPA) development easier. The most important need of SPA is an implementation of Routing in the app. Since React.js does not have any built-in routing support, we can install the react-router-dom…
Fluent Validations in ASP.NET Core 25 Oct 2020
In this article we will implement Fluent Validations using ASP.NET Core.Most of you might have used Data Annotations for server-side model validations. We use data annotations to apply validations on public properties of the entity/model class so that when the view is submitted,…
Testing Angular Component using Jest 01 Sep 2020
In this tutorial, we will go through the steps for testing Angular Component by using the Jest framework.Since Angular is a widely used front-end application development framework, it is the responsibility of each developer to make sure that the components are implemented as per…
ASP.NET Core 3.1 Unit Testing using xUnit and Moq 06 Jul 2020
In any software life-cycle, Testing is an important step for ensuring a good quality software application. Typically, in case of web applications, testing plays an important role. In the software applications, we have the following major testing types: Unit Testing is the most…
Accessing Azure Table Storage in Node.js Applications 27 Apr 2020
Microsoft Azure Storage services provides features of storing NoSQL data in the Table Storage. The Azure Table Storage stores schema-less data using Key/Value pairs. Since the data store is schema-less, we can use Table Storage to store the data for those applications that are…
Using Mongoose Framework to Access Azure Cosmos DB MongoDB API 25 Apr 2020
Cosmos DB is a globally-distributed, multi-model database service on Microsoft Azure. Cosmos DB provides database services like SQL API, MongoDB API, Cassandra, Gremlin for storing NoSQL data. We can create a Cosmos DB account to create a database and perform Read/Write…
Creating Web Applications using MERN Stack 13 Mar 2020
MongoDB: MongoDB is a cross-platform document-oriented database program. It is a NoSQL Database. The data is stored in JSON document format and this database can store images in Base64 encoded format. More information on MongoDB can be read from this link. Express.js: This is a…
File Upload using ASP.NET Core WEB API 3.1 and React.js Client Application 24 Feb 2020
In this post we will see how to upload files (jpeg/png) to the ASP.NET Core 3.1 WEB API. We all know that WEB APIs are mainly used for Data Communication using JSON format across applications. But what if we want to use WEB APIs for accepting binary files from the client…
Parallel HTTP calls from Angular 02 Nov 2019
Angular being an extensible framework is widely used for developing high responsive front end modern web applications. These modern web applications consist of several complex workflows on the server side. To provide access of these workflows to client applications, we need REST…
Using Entity Framework Core to access Stored Procedures having User Defined Table Types as Parameters 29 Aug 2019
Last week while conducting a .NET Core Full Stack training, my client asked me to explain the mechanism of accessing SQL Server Stored Procedures using Entity Framework (EF) Core. They were creating an ASP.NET Core 2.2 WEB API app. I have explained the entire process with…
How to Create a Service connection from Azure DevOps to your Azure account 06 Aug 2019
Many a times, we want to deploy our built application to Azure. Such deployment can be done using a service connection from Azure DevOps to Azure. We may have an Azure account and also an Azure DevOps account created at different times. If both the accounts are created using the…
Accessing Azure CosmosDB database using Node.js and Express REST APIs 11 Jul 2019
Last week, I was conducting a session on MEAN Stack. In this training, I taught my students how to access MongoDB in an Express application. One of the attendees asked me to create a demo on accessing CosmosDB using Node.js apps. In this tutorial, I will show you the steps to do…
ASP.NET MVC – Flashback of Important Concepts 05 Jun 2019
A decade ago, ASP.NET Web Forms was the flagship framework for designing and developing web apps using .NET. Over the years, developers had been demanding the ability to develop Web applications using a model-view-controller architecture. To address these needs and to stay…
Global Error Handler in ASP.NET Core 28 Mar 2019
Error handling is crucial for any application. In Line-of-Business (LOB) ASP.NET applications, error handling can be implemented in multiple ways. Generally, when an application needs to perform data validations on data submitted by end-users, we implement data validations using…
Dockerizing a Node, Express and MongoDB Application 27 Mar 2019
In this tutorial, we will dockerize a Node,Express and Mongo Application. We will be using a Docker Linux container. Let’s first take an overview of Docker and then we will directly jump to the implementation of the application. What is Docker and why to use it? When our…
Login failed for user IIS APPPOOL\AppPool4.5 or APPPOOL\ASP.NET 30 Dec 2018
The error ‘Login failed for user 'IIS APPPOOL\AppPool4.5’ usually occurs when you configure a new website in IIS or move an existing website to a newer version of IIS. A simple solution to the error is to add a login to SQL Server for IIS APPPOOL\ASP.NET v4.5 and grant…
Angular 6 Internationalization (with examples) 05 Nov 2018
Angular is one of the most widely used front-end framework for modern web applications. The component-based design of Angular is suitable for modern web applications because each component can have its own UI, DataBinding, Events, etc. We can use Angular with its object model to…
File Upload in ASP.NET Core 22 Oct 2018
In one of the .NET Core trainings I was conducting recently, one of my students asked about uploading files using .NET Core application. Here's a solution. When we use ASP.NET MVC to upload a file, we use the HttpPostedFileBase class. This class is used to access the files…
Using CSS Selection Pseudo-element to change the Default Selection Style of your WebPage 16 Aug 2018
CSS Pseduo-elements allow you to style certain parts of a document. In this article, we will see how to change the default selection style of your web page contents using ::Selection PseudoElement. Although you can use any webeditor of your choice, I am using Visual Studio 2013…
HTML5 Picture Element for Responsive Images 27 Jul 2018
In this article, we will look at the element and how it helps in responsive design to render images of different sizes, based on the physical device accessing the content. To display an image in our HTML pages, we have so far made use of the element with the source [src]…