C# Corner

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  • App.Config AutoReaderJan 17, 2018. In our day to day development, it is a rare case where we don’t need to read a configuration file. There are many techniques for the treatment of such static classes, singleton classes, etc and it is normally that the Config class is accessible in all projects.
  • Basics Of Kotlin - JVM ImplementationJan 15, 2018. Hello Guys, we already knew that Google announced that Kotlin is a new first class language for Android Development. Kotlin is now an official language on Android. It's expressive, concise, and powerful. Best of all, it's interoperable with our existing Android languages and runtime.
  • Basics Of Angular And Its Versions - Part TwoJan 15, 2018. Module is nothing but a package like a package in Java, a namespace in C# and like a header-file in C / C++. Java, C#, and C++ have their own modularity system which contains classes, interfaces, enumerations etc. In the same way, Angular also has its own modularity system called NgModules which helps to organize an application into adhesive blocks of functionality. Every Angular application should have at least one NgModule and the root module is called AppModule.
  • Add Quick Launch Link To SharePoint 2013 Site Using REST APIJan 15, 2018. In this article, I have explored how to add links represented as headings in the Quick Launch area of the user interface using REST API. Here, we trying to add a custom navigation node corresponding to links in the Quick Launch area of the site using REST API using jQuery.
  • Angular 5 CRUD Operation Using Node, Express, MongoDBJan 13, 2018. In this article, we’ll learn to create basic CRUD application using angular 5, Nodejs, Express and Mongodb nosql database.
  • Singleton Design Pattern In C# - Part Three (Static vs Singleton)Jan 11, 2018. In this series of learning singleton patterns, we learned lazy initialization and eager initializations with practical examples. We also learned why it is necessary to make the singleton class sealed with sealed keyword. In this article, I’ll try to explain the differences between static and singleton class and where to use static and where to use singleton classes.
  • Singleton Design Pattern In C# - Part Two (Eager and Lazy Initialization in Singleton)Jan 09, 2018. In this article, we’ll discuss Lazy initialization, the lazy keyword, why to make singleton class a sealed class and what are the differences between singleton and static class.
  • Setup React App Using Node.js, Webpack And TypeScriptJan 09, 2018. React is one of the leading technologies that is used to create single page applications(SPA). Some others are Angular and Vue.js. In this article we will learn how to set up a React project using Webpack, Node.js and Typescript.
  • Three Popular C# InterfacesJan 09, 2018. In this article, you will learn about the most common interfaces in the C# Libraries that you can use to create robust classes and objects.
  • Hashing In ASP.NET Core 2.0Jan 08, 2018. The new Data Protection API in .NET Core includes functionality to create hashes using PBKDF2algorithm. ASP.NET Core uses this behind the scenes in PasswordHasher class, which is used in ASP.NET Core Identity.
  • Device Year Class Library Using Android ApplicationJan 02, 2018. Android device's specifications and calculates which year the device would be considered.
  • How To Create Own NPM Package And Publish ItDec 29, 2017. NPM (Node Package Manager) is a package manager for JAVASCRIPT (Node.js) , use of npm is to use already developed javascript module in your application. It contains command line client that interacts with remote registry where the actual package resides
  • Creating A CRUD With ASP.NET Core And EF CoreDec 28, 2017. Entity Framework Core (EF) is an ORM that makes it simpler to work with database by using POCO classes that map to database entities and DbContext to interact with them.
  • Consuming ASP.NET Core 2.0 Web API Using HttpClientDec 26, 2017. We’ll create a library to wrap the functionality of HttpClient. I’ll use builder pattern for this purpose. Add a class with methods for storing parts of HttpClient.
  • Validating User Input Using Regular Expression With C#Dec 22, 2017. In this article, you will learn how to validate user input using Regex class with C# Programming language
  • Asynchronous Messaging Using ASP.NET Core 2.0 Web APIDec 21, 2017. How to implement asynchronous messaging using ASP.NET Core Web API. Create an empty project and update the Startup class to add services and middleware for MVC.
  • Documenting ASP.NET Core 2.0 Web APIDec 20, 2017. Documents generated by Swagger can include XML documentation.
  • Generating XML Root Node Having Colon-Via SerializationDec 20, 2017. This article discusses some of the issues faced while generating an XML on the fly with some defined schema.
  • Configure Identity In ASP.NET Core 2.xDec 15, 2017. Identity is a membership system that allows us to add login functionality to our application. In my previous article, I have explained about the overview of Identity in ASP.net Core. There are some default behaviors that can be overridden easily in our application in ConfigureService method of startup class.
  • MySQL Data Access API Development Using Express.JS, Node.JSDec 14, 2017. In this article, we are looking into introduction of Node.JS, Express.JS and then I am going to create Simple MySQL data access API using Express.JS, Node.JS.
  • Special Class Of C# Series - Part Two - OLE DB (Extended Properties)Dec 14, 2017. In this series of C# Special classes, we are going to see the special features available with the “OleDbConnection” class and its specialties.
  • Special Class Of C# Series - Part One - Partial ClassDec 13, 2017. This article will help you understand what partial class is used in C-Sharp language. Also, I will explain the various uses of the partial class.
  • What XSLT Transformation Is And How To Use ItDec 12, 2017. XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML documents. Sometimes the user wants to some kind of xml structure instead of whole xml; In that case we can use XSLT transformation. This article gives us idea about this.
  • Socket.io Programming With Example In Node.jsDec 08, 2017. Hello every one today I will explain about socket.io in Node JS
  • Understanding Classes In KotlinDec 07, 2017. In the above example, I have created a nested class ‘Nestedclass’ which has a data member ‘b’ and a member method show(),now the object of nested class can access member of nested class only.
  • Creating Server And Host HTML Page Using Node.jsDec 07, 2017. Today my mission is to explain about creating server in Node JS and hosting html pages on this server and accessing it from web browser.
  • Object-Relational Mapper For SQLite3 In Node.jsDec 07, 2017. Node.js is getting more popular day by day and many frameworks and platforms are supporting Node.js for its high-performance web server development. In this post, you will learn the database development in Node.js with the popular ORM library; Sequelize.
  • Callback Concept And Events In Node.jsDec 06, 2017. Hello friends, today I explain you about callbacks and events in Node JS. People who are new to Node JS please learn previous articles NodeJS - Getting Started With Some Basic Functions .
  • Hello World With Angular 5Dec 06, 2017. It’s very important to setup an environment for development before jumping into coding. For Angular to run we need to install node.js.
  • Aspect Oriented Programming In C# Using DispatchProxyDec 06, 2017. Example of implementing logging using Aspect Oriented approach with DispatchProxy class.
  • Creating A Chat Application In Node.js With Express, MongoDB, Mongoose And Socket.ioDec 05, 2017. In this article, we are going to create a chat application in NodeJS with the back end MongoDB. We will also be using Mongoose for creating the MongoDB models and Socket.io for making multi directional chats on multiple client window.
  • Display Sub Directories And Files In TreeViewDec 05, 2017. Display Sub Directories and Files in Treeview, Tooltip in Treeview Nodes, Loading Files in Treeview, Display image icon in TreeNode.
  • Using MongoDB On Node.js Application Using MongooseDec 04, 2017. In this post, we are going to see how we can use a MongoDB on our Node JS application with the help of the package Mongoose. We will also be covering some facts about MongoDB so that as a reader, you will understand why we have chosen MongoDB as our backend. We will be going through some steps to install the required packages using a node package manager terminal, so please bear with me. At the end of this article, I guarantee that you will be proficient on how to connect a MongoDB in our Node JS application. I hope you will like this article.
  • NodeJS - Getting Started With Some Basic FunctionsDec 02, 2017. Today, I am explaining about getting started with NodeJS. Node.js is a powerful JavaScript-based framework/platform built on Google Chrome's JavaScript Engine.
  • Creating An HDInsight Hadoop Cluster On LinuxDec 01, 2017. This article shows how to create the HDInsight Hadoop cluster with Linux installed on the cluster nodes in the Azure Portal.
  • Building Entity Framework Disconnected Generic RepositoryNov 29, 2017. The repository pattern separates and retrieves data model mapping logic from the business logic. We will create a repository class for each entity class in our application. All these classes usually have a main group of equals methods.
  • Comparing Objects In C#Nov 29, 2017. In this article, we are going to compare two objects of the same class having collection property or multiple collection properties.
  • Convert XML File To Excel FileNov 27, 2017. Here, we are going to learn to read XML files in C# WindowsForm applications. We are going to make a small single-form application which takes an XML file from the user and convert XML Data to Excel Data and Returns an Excel File.
  • MVC 5 Demo Project With Entity Framework (DB First)Nov 23, 2017. MVC project has been set up. Now, make a new C# class library project which will act as a DAL layer and Entity Framework will be handled through this project.
  • Copying A File In Node.js v8.5Nov 22, 2017. In this article, I will explain how to copy a file using the brand new Node.js version 8.5.
  • Create App Using Xamarin.Android Using C# - Part FourNov 17, 2017. Xamarin.Android has native user interface controls. These controls can be easily added to Xamarin.Android apps using the Android Designer or programatically via XML layout files. Xamarin.Android exposes all of the user interface object properties and methods in C#.
  • Creating CRUD API In ASP.NET Core 2.0Nov 17, 2017. ASP.NET Core gives a unified mechanism for creating MVC and Web API application. The key difference is that Web API will return JSON (or XML) and HTTP status codes instead of views, in order to communicate with the client.
  • What Is Struct And When To Use Struct In C#Nov 15, 2017. 'Struct' keyword is used to create a structure. A structure can contain variables, methods, static constructor, parameterized constructor, operators, indexers, events, and property. A structure can not derive/inherit from any structure or class. A structure can implement any number of interfaces. Structures provide better performance.
  • Passing Parameters To Middleware In ASP.NET Core 2.0Nov 15, 2017. I discussed in an earlier post that it is good practice to define middleware in a separate class and add to the pipeline using extension methods. We may also need to pass information to our middleware classes though and I’ve come across two patterns for this when digging into ASP.NET Core source code and other samples online.
  • How To Use StringBuilder And File Class For .NET ApplicationNov 14, 2017. Here, I am going to share how and why should we create error log in our application.
  • Building A Questionnaire Site With Node.jsNov 14, 2017. This was our first project with Node.js, and by God, it was a pain. Node.js is an excellent framework, with blazing fast speed, and an intuitive development framework. For those who are familiar with HTML, CSS and JavaScript, Node.js is one of the best alternatives to PHP, ASP.NET or other server-side scripting languages that require a language to be learnt. Node.js is light-weight, resilient and community-led and in-development framework. This article is primarily focused on teaching the beginners in Node.js development. You can expect to learn a few basics of Node.js setup, how to manage the databases in Node.js environment and a bit more (less too, maybe).
  • Azure Table Storage In ASP.NET Core 2.0Nov 14, 2017. Add a class to encapsulate storage access. Add a private helper method to access storage
  • Creating Azure WebJob To Access SharePoint Using Typescript And Node.jsNov 14, 2017. Create a new folder in the solution by the name 'src' and create index.ts file inside the folder. In this folder we will keep all the source files which will get executed when the Job runs. Remember to keep the index.ts at the root of the src and all other files (if any) keep them in the folder otherwise the job will fail.
  • Introduction To Xamarin.Android Using C# - Part OneNov 10, 2017. Xamarin.Android will create native Android applications using modern language (C#), .NET Base Class Library Visual Studio. Xamarin is a cross-platform development tool. It solves dilemmas many developers face when developing cross-platform apps: separate coding languages and UI paradigms. With Xamarin, you can use C# for iOS, Android, and Universal Windows apps. And with Xamarin Forms, interface design for all three platforms can be accomplished within its XAML-based framework.
  • Binding DropDown List Using Tuple In ASP MVCNov 05, 2017. Tuple is a generic static class that was added to C# 4.0 and it can hold any amount of elements, and they can be any type we want. So using tuple, we can return multiple values.One great use of tuple might be returning multiple values from a method. It provides an alternative to "ref" or "out" if you have a method that needs to return multiple new objects as part of its response.
  • Three Digit Sum Using Tuple in C#Nov 02, 2017. In this article, we will be discussing an algorithm which returns possible (no. of pairs) digit pairs that are equal to a given number (6) using Tuple class.
  • SystemDataPaths In UWP (Windows 10 Fall Creators Update Features)Oct 31, 2017. This article explains about how to get system , app , user based path information. This SystemDataPaths, UserDataPaths, AppDataPaths class will be supported on Windows 10 Fall creators updated version build or greater and Windows 10 SDK 16999.
  • Getting Started With Receipt Card Design Using Microsoft Bot FrameworkOct 29, 2017. The Bot Framework supports different type of rich cards and provides a richer interaction experience to the user. In this article, I will show how to integrate Receipt card UI design in a Bot Application. If you are developing a shopping card Bot chat application; receipt card is very important. Receipt card class has property as a list of items, total, tax, vat, title and image. We can re-use all receipt card properties and add tab action event for navigating to original invoice website.
  • Add Class Library In ASP.NET Core Using .NET Core Command-Line Interface (CLI)Oct 29, 2017. This article explains how to add Class Library in ASP.NET Core using .NET Core Command-Line Interface (CLI) with a simple way. Before reading this article, read the previous parts of this article using below article link.
  • Debugging Tips - Part TwoOct 27, 2017. While working on complex classes/objects, it really takes two more clicks to either add that object to the Watch window or expand the object in visualizer and navigate to a specific property.
  • Debugging Tips - Part OneOct 24, 2017. A cool attribute to save some debugging time is DebuggerTypeProxy (Namespace: System.Diagnostics). Using this attribute, you can write your own logic to interpret the object at debug time. Meaning, if you have a list of class objects then you can project on certain properties and force debugger to show the value off of this proxy class. This attribute is applicable to Structures, Classes and Assemblies.
  • How to use NPM Install (The Command) behind Corporate Proxy ServerOct 14, 2017. When you want to install packages for angular, angular CLI, typescript etc. via NPM using Command Prompt and you are working in an office environment where everything runs behind a corporate proxy server, you will most probably get the below exception.
  • Getting Started With Entity Framework Core - Database-First DevelopmentOct 12, 2017. This article is the first part of the series on Getting Started with Entity Framework Core. In this post, we will build an ASP.NET Core MVC application that performs basic data access using Entity Framework Core. We will explore the database-first approach and see how models are created from an existing database. We will also take a look at how classes become the link between the database and ASP.NET Core MVC Controller.
  • Angular Components (With Examples)Oct 12, 2017. A Component is nothing but a simple typescript class, where you can create your own methods and properties as per your requirement which is used to bind with an UI (html or cshtml page) of our application.
  • Excel To XML Using LINQOct 11, 2017. In this article we will show you the easiest way to convert Excel data into Xml files. There is a certain way to convert Excel file to Xml, for example using Excel Library (Com Component)
  • ASP.NET Core 2.0 Session StateOct 09, 2017. Using an empty project from a previous post, amend Startup class ConfigureServicee() method, and add services for session and its backing store.
  • Xamarin.Forms - Create MVVM Data Binding Application Oct 07, 2017. Xamarin Forms Platform using Create MVVM Data Binding application using xml and c# code
  • ASP.NET Core 2.0 Error PagesSep 29, 2017. Starting from an empty project, created in a previous post, amend the Configure() method of Startup class to use middleware needed for error handling. Below I’ve used a custom middleware (defined as lambda) to handle production exceptions.
  • Why "Service Locator" is an "Anti-Pattern" for Dependency InjectionSep 29, 2017. The Service Locator is used as a replacement for the new operator. The problem with service pattern is that it hides a class's dependencies and is a bonafide anti-pattern. In fact, it takes away a developer's clarity about the class he/she is using.
  • Create Value Object In C#Sep 28, 2017. Create a class that abstracts away (encapsulate) ‘data’ in your domain and provide methods to work on it. Below is a class I don’t consider a good Value Object.
  • Default(T) In GenericsSep 27, 2017. Default represents default value of T parameter in generics intructions. In several cases, the default keyword is an absolute unknown and we think it’s unnecessary or its functionality is null. There are many development moments with the generics classes where the default keyword can be useful.
  • Introduction To Tag Helpers In ASP.NET CoreSep 18, 2017. Tag helper is a new feature in ASP.net MVC. It enables server-side code to create and render HTML elements in Razor View. It is feature of Razor View engine. They are the C# classes which participate in view generation by creating the HTML elements. Using the tag helper, we can change the content of HTML element and add additional attributes to the HTML element. It is very similar to HTML helper in ASP.net MVC.
  • Selection Manager For WPF/MVVMSep 17, 2017. This article presents the idea and implementation of a class to manage the selection of only one element in different linear and hierarchical structures.
  • Build Chat Application On MEA2N Stack - Part TwoSep 17, 2017. In the previous part of the article series, Build Chat Application On MEA2N Stack – Part One, we built a basic chat application on Node.js platform using Express, Angular 2 and socket.io. In this article, we are going to use MongoDB Atlas for saving our chats and retrieving history whenever user requests it.
  • Introduction To SharePoint Framework (SPFx) - Zero To Hero Series - Part OneSep 17, 2017. SharePoint Framework is also abbreviated as SPFx. SharePoint Framework offers modern technologies, Node-based development, TypeScript, etc. that are applied to SharePoint and Office 365 development.
  • Working With Azure Tables - Part TwoSep 09, 2017. Let us look at the basic sample, which retrieves the Azure table data into the applications using Node JS.
  • Aspect Oriented Programming In C# With RealProxy classSep 07, 2017. Example of implementing logging using RealProxy class.
  • How To Perform Web Scraping Using Python ProgramSep 04, 2017. Web Scraping (also known as Screen Scraping, Web Data Extraction, Web Harvesting etc.) is a process to scrap (extract) data from web pages, web document, HTML document or XML document in a structured manner and then store in database, text file as a spreadsheet , as a XML , or in whatever file format we want to save in.
  • Construct Readable XML Output From SQL Query From Two Or More Tables Using “For XML PATH” StatementSep 04, 2017. In my previous article I discussed about how to get a XML format output from query and process that by using XML AUTO statement, and I give different types of “for XML”.
  • Develop ChatBot On NodeJS platform Using Microsoft Bot Framework (Part One) - Quick Start For BeginnersSep 02, 2017. Microsoft bot framework includes Bot Builder tools which will help bot development. Bot Builder is an open-source SDK. It supports .NET, Node.js, and REST. The Bot Builder SDK for Node.js uses Express & Restify frameworks. In this article, we are going to develop a chatbot on NodeJs platform.
  • Building A .NET Core 2.0 Class LibraryAug 31, 2017. In my previous tutorial, Getting Started with .NET Core 2.0, we learned how to build our first console app using .NET Core 2.0. We also learned how to package and deploy the application so it can be used by other users.
  • Working With JSON In SQL Server 2016Aug 28, 2017. JSON (JavaScript Object Notation) is a lightweight data interchange format. It is language independent, easy to understand and self-describing. It is used as an alternative to XML. JSON is a very popular data interchange format nowadays. Most modern services return the data into the JSON text.
  • Send An Email In Node.jsAug 21, 2017. In this article, we will learn how to send an e-mail in node.js
  • IoT With HTML5 Game Engine And Node.JSAug 21, 2017. In this article, I will tell you how to use node.js as a bridge between an HTML 5 game and IoT by using Johnnyfive.io and Phaser.io.
  • Transform XML Output Of SQL Query To HTML Using "For XML" AUTO Statement With XSLT In C#Aug 21, 2017. Normally, we execute the query using ExecuteNonQuery statement and fill the output into data table. This article describes how to transform the XML output of SQL query statements using FOR XML AUTO to HTML using XSLT.
  • Dependency Injection - Part 3 - Implicit Vs Explicit DependenciesAug 12, 2017. If a component or class depends upon other components to complete its operations, then these other components are dependencies for this class. Our class can have these dependencies as implicit or explicit dependencies.
  • Machine Learning In IoT By Node.jsAug 11, 2017. In this article, I am planning to tell you how to use Scikit-learn with Python scripts for iot applications by using Node.js. First to know ; you have to read my previous articles about IOT by Node.js.
  • Dependency Injection - Part Two - Five Reasons To Write Loosely Coupled CodeAug 09, 2017. A loosely coupled application has good isolation among its classes, modules and assemblies. Therefore, if we make a change to one part of the application, we only need to update the relevant modules. We do not need to make changes throughout the application.
  • Accessing XML Data From XML Document In C# Console ApplicationAug 09, 2017. In this article, I am going to give the best way to access XML data from XML document and also how to find common record node counts.
  • Architecture Of Azure Ethereum Consortium Network - SimplifiedAug 08, 2017. A network created using Azure Consortium Blockchain template consists of shared transaction nodes and mining nodes. User application will interact with transaction nodes for any operation like submit transaction etc. For each consortium member (the number of members is specified while configuration), specified number of mining nodes are created.
  • Dependency Injection - Part One -Tightly Coupled ApplicationAug 07, 2017. It is a best practice to use interfaces instead of concrete classes. These interfaces can then be mocked at the time of unit testing, which will prevent any call to the actual database. Also, it is a good practice to stop "newing-up" objects in classes.
  • SharePoint REST Calls With SPHttpClient Class In SPFx WebpartsJul 31, 2017. Let us look at the usage of sphttpclient in SPFx solutions for making REST calls.
  • Entity Framework CRUD Operation Performed With SQL Stored Procedure Using ADO.NET Entity Data ModelJul 31, 2017. You can see my pervious article for Entity framework with Ado.Net data Model connection and how to create a new entity framework project and sql database connection maintained with created entity framework project. Also you can see how to create a class in entity framework based on data table.
  • Built-In Filter Type In ASP.NET Core MVCJul 29, 2017. The ASP.net core framework includes five built-in filter types that we can sub-class and customize based on our requirement. The framework supports following built-in filters type.
  • Component In Angular 2 and How to Create Nested Component in Angular 2Jul 25, 2017. In this article, we will learn about Angular 2 components and we will also see how to create a nested component.
  • Learn Web API : Using SQL Helper ClassJul 25, 2017. This article demonstrates how to use Web API Using SQL Helper Class with easy to use data base access in Visual Studio 2017.
  • Code First Development Approach With Entity FrameworkJul 20, 2017. Which one to use in your project is completely your choice and also what you already have in place. Meaning are you designing/developing something from scratch or you already have got DB or domain classes, and also what are your preferences, meaning do you prefer to design classes first and then let your DB gets developed from those classes or you like to design visual class diagram first.
  • Integrating SharePoint Data Into Node.JS With Access TokenJul 17, 2017. In this article, you will learn how to integrate SharePoint applications data into node applications with access token.
  • Multithreading In C# .NetJul 16, 2017. If you have a program that execute from top to bottom, it will not be responsive and feasible to build complex applications. So .Net Framework offers some classes to create complex applications.
  • Best Practices For MVCJul 14, 2017. Add a class library project to the solution, named Store.Model. This library is where we ‘ll keep all of our domain objects. Entity Framework will count on them in order to build the database but we are not going to configure Code First using DataAnnotations attributes on this project. Instead, we are going to put all the Code First configuration in specific Configuration classes using the Fluent API. Add a folder named Models.
  • Integrating SharePoint Data Into Node.JS ApplicationJul 13, 2017. In this article, you will learn how to integrate SharePoint applications or data into node applications.
  • How To Create A List/Library Programmatically In SharePoint 2013Jul 13, 2017. We need to install Visual Studio in our machine for creating a list using SharePoint Server Object Model. The Server Object Model will be executed in the server side & it provides a rich set of classes in representing & manipulating SharePoint objects. Server object model is like production server environment to access the data where Sharepoint is installed on the machine.
  • Simulate SharePoint Online Timer Jobs Using Azure FunctionsJul 05, 2017. SharePoint Server provides native Timer Jobs that inherit SPJobDefinition class to run at regular intervals defined in the SPSchedule object. This way we can create solutions that have to be iteratively run to process logic at regular intervals. However, in case of SharePoint Online Native Timer Jobs cannot be used.
  • Microsoft Azure Automation Using PowerShell Desired State Configuration And Node Configuration And ManagementJul 04, 2017. Microsoft Azure is very aggressive about providing Automation Solutions and Services to users by Azure Automation Service, by which we can automate the manual, long running and frequent, periodically repeating tasks of the cloud and can manage and configure a number of nodes
  • Create A Bot With Microsoft Bot Framework Using Node.jsJul 03, 2017. In this article, you will learn how to create a Bot using Bot Framework with newly launched Custom Vision service.

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