kaveer's blog

Functions and Methods in C# 🚀 Functions (or methods ) in C# encapsulate logic and allow code reuse . They take input parameters , process logic, and return results . 1️⃣ Defining and Calling Methods A method in C# consists of: Access modifier Return type Method name Parameters (optional) Method body 🔹 Basic Method Syntax: [AccessModifier] ReturnType MethodName(ParameterList) { // Method body return value; // (if applicable) } Example: class Program { static void SayHello() // No parameters, no return type { Console.WriteLine("Hello, World!"); } static void Main() { SayHello(); // Method call } } 2️⃣ Methods with Parameters 🔹 Passing Arguments Parameters allow input values to be passed to a method. static void Greet(string name) { Console.WriteLine($"Hello, {name}!"); } static void Main...

Control Structures in C# 🚀 Control structures help control the flow of execution in a program. C# provides conditional statements ( if-else , switch ) and loops ( for , while , do-while ) to handle different scenarios. 1️⃣ Conditional Statements 🔹 if-else Statement The if-else statement executes code based on conditions . Syntax: if (condition) { // Code runs if condition is true } else if (anotherCondition) { // Code runs if anotherCondition is true } else { // Code runs if none of the above conditions are true } Example: int age = 20; if (age >= 18) { Console.WriteLine("You are an adult."); } else { Console.WriteLine("You are a minor."); } ✅ Nested if-else int number = 10; if (number > 0) { if (number % 2 == 0) { Console.WriteLine("Positive Even Number"); } else { Console.WriteLine("Positive Odd Number"); } } 🔹 switch Statement The switch statemen...

Variables, Data Types, and Operators in C# 🚀 Understanding variables, data types, and operators is essential for writing C# programs. Let’s go step by step. 1️⃣ Variables in C# A variable is a named storage location that holds data. 🔹 Declaring Variables dataType variableName = value; Example: int age = 30; string name = "John"; double price = 99.99; 🔹 Variable Naming Rules ✅ Must start with a letter or underscore ( _ ) ✅ Can contain letters, digits, and underscores ✅ Case-sensitive ( myVar and MyVar are different) ✅ Cannot use C# keywords (e.g., int , class , public ) 2️⃣ Data Types in C# C# has value types (stored directly in memory) and reference types (stored as references). 🔹 Common Value Types Data Type Size Example Description int 4 bytes int x = 100; Stores whole numbers double 8 bytes double pi = 3.14; Stores decimal numbers float 4 bytes float price = 9.99f; Smaller decimal precision char 2 bytes char grade...

Setting Up Your C# Development Environment 🚀 Setting Up Your C# Development Environment If you’re ready to dive into C# and .NET development , the first step is setting up a proper environment. This includes installing the .NET SDK , choosing an IDE , and configuring essential tools. 1️⃣ Install the .NET SDK The .NET SDK provides everything you need to build, run, and publish .NET applications. ✅ Download & Install .NET SDK Visit the official .NET download page: https://dotnet.microsoft.com/download Download the latest .NET SDK (LTS version recommended). Run the installer and follow the instructions. ✅ Verify Installation dotnet --version If installed correctly, you’ll see the installed .NET version . 2️⃣ Choose an IDE (Integrated Development Environment) You need an IDE or code editor to write ...

Passing Data from Controller to View in ASP.NET Core MVC In ASP.NET Core MVC, passing data from the controller to the view is a crucial part of rendering dynamic content. There are several ways to pass data, including ViewData , ViewBag , and Model . Let's explore these methods: 1. Passing Data Using Model The most common and recommended way to pass data from the controller to the view is by using a model . Steps: Create a Model : Define a class that will hold the data. Pass the Model : Use the View() method in the controller to pass the model data to the view. Use the Model in the View : In the view, specify the model type and access its properties. Example: Step 1: Create a Model public class Product { public int Id { get; set; } public string Name { get; set; } public decimal Price { get; set; } } Step 2: Controller public class ProductController : Controller { public IActionResult Index() { var product = new Product ...

Creating Controllers & Actions in ASP.NET Core MVC In ASP.NET Core MVC, Controllers are responsible for handling incoming HTTP requests and returning an appropriate response. Actions are methods within controllers that handle specific requests and provide the logic for what should happen when those requests are made. 1. Understanding Controllers Controllers are classes in ASP.NET Core that contain action methods . Each action method corresponds to a route in the application and performs a specific task, such as displaying a view or handling user input. Syntax : public class ControllerNameController : Controller { // Action methods go here } A controller class typically ends with "Controller", e.g., ProductController , HomeController . The Controller class inherits from the base class Controller provided by ASP.NET Core. 2. Creating a Basic Controller Let’s create a controller to handle product-related actions in a simple e-commerce applicat...

Understanding the MVC Pattern MVC (Model-View-Controller) is a software architectural pattern commonly used for developing user interfaces, especially in web applications. It helps in organizing the code in a way that separates the concerns of data, user interface, and the logic that connects the two. MVC makes the application more modular, maintainable, and testable. MVC Components: Model : Definition : The model represents the application's data and the business logic. It directly manages the data, logic, and rules of the application. Responsibilities : Represents the state of the application. Fetches data from the database (using ORM tools like Entity Framework). Contains business logic and validation rules. Sends data to the view. Can notify the controller of any changes or updates. View : Definition : The view is the presentation layer, representin...

Understanding ASP.NET Core Project Structure ASP.NET Core follows a structured and modular approach. Let's break down the key components of a typical ASP.NET Core project. 🔹 1️⃣ Project Structure Overview 📂 MyAspNetApp/ ├── 📄 Program.cs ➝ Application Entry Point ├── 📄 appsettings.json ➝ Configuration Settings ├── 📂 wwwroot/ ➝ Static Files (CSS, JS, Images) ├── 📂 Controllers/ ➝ Handles HTTP Requests (MVC API) ├── 📂 Models/ ➝ Defines Data Structures ├── 📂 Views/ ➝ Handles UI Rendering (Razor Views for MVC) ├── 📂 Middleware/ ➝ Custom Request Processing Logic 🔹 2️⃣ Program.cs - Application Entry Point This is where the ASP.NET Core app starts . It registers services , configures middleware , and sets up the request pipeline . Example Program.cs File: var builder = WebApplication.CreateBuilder(args); // Add services to the container builder.Services.AddControllersWithViews(); // Enables MVC var app = builder.Build(); // Configure Middleware P...

Template syntax is how Angular binds data and adds logic to your HTML. Let’s break down the essentials: interpolation ( {{ }} ), and structural directives like *ngIf and *ngFor . 🧩 Interpolation – {{ }} Interpolation is used to display data from your component class in the template. ✅ Example: <p>Hello, {{ name }}!</p> export class AppComponent { name = 'Angular'; } 🧰 Structural Directives Structural directives shape or change the structure of the DOM . They start with an asterisk * . 1. 🧾 *ngIf – Conditional Rendering Renders the element only if the condition is true . <p *ngIf="isLoggedIn">Welcome back!</p> <p *ngIf="!isLoggedIn">Please log in.</p> isLoggedIn = true; You can also use else : <div *ngIf="items.length > 0; else noItems"> <p>Items available!</p> </div> <ng-template #noItems> <p>No items found.</p> </ng-templat...

🧩 What is a Component Decorator? The @Component decorator is a TypeScript decorator that tells Angular: "Hey, this class is a component and here’s some extra information about it." It's applied above the class definition and includes a metadata object . 🔧 Basic Syntax import { Component } from '@angular/core'; @Component({ selector: 'app-my-component', templateUrl: './my-component.component.html', styleUrls: ['./my-component.component.css'] }) export class MyComponent { // Component logic here } 📦 Metadata Properties Breakdown Property Description selector The name used to include the component in HTML ( <app-my-component> ). template Inline HTML template. templateUrl External HTML file for the template. styles Inline styles for the component. styleUrls External CSS or SCSS files. providers List of services/providers available only to this ...

Creating components is a core concept in Angular because components are the building blocks of any Angular application. 🔹 What is an Angular Component? A component in Angular controls a view (HTML template) and contains logic to support that view (written in a TypeScript class). It typically consists of: A .ts file (logic) A .html file (template) A .css or .scss file (styling) 🔧 How to Create a Component ✅ Using Angular CLI (recommended) ng generate component component-name # OR ng g c component-name For example: ng g c user-profile This creates a folder like this: src/app/user-profile/ ├── user-profile.component.ts ← component logic ├── user-profile.component.html ← template ├── user-profile.component.css ← styles ├── user-profile.component.spec.ts ← test file 🧱 Anatomy of a Component user-profile.component.ts import { Component } from '@angular/core'; @Component({ selector: 'app-user-profile', temp...

Modules and Namespaces in TypeScript Modules and Namespaces in TypeScript Let’s break down Modules and Namespaces in TypeScript — both are mechanisms for organizing and reusing code, but they serve slightly different purposes and are used differently. 🔹 Modules in TypeScript ✅ What is a Module? A module is a file that contains code (classes, interfaces, functions, variables, etc.) and exports them so they can be reused in other files by importing . 🔧 How to Create and Use a Module math.ts (a module) export function add(a: number, b: number): number { return a + b; } export const PI = 3.14; main.ts (importing the module) import { add, PI } from './math'; console.log(add(5, 10)); // 15 console.log(PI); // 3.14 Modules follow ES6 module syntax and are commonly used in Angular and modern TypeScript projects. 🔹 Namespaces in TypeScript ✅ What is a Namespace? ...

Functions and Arrow Functions in TypeScript Functions and Arrow Functions in TypeScript Great! Let’s dive into Functions and Arrow Functions in TypeScript (used throughout Angular apps for clean and modular code). 🔹 1. Traditional Functions A function is a reusable block of code that performs a specific task. ✅ Basic Syntax function add(a: number, b: number): number { return a + b; } console.log(add(5, 3)); // Output: 8 ➕ Optional & Default Parameters function greet(name: string = "Guest"): string { return `Hello, ${name}`; } console.log(greet()); // Hello, Guest console.log(greet("Alice")); // Hello, Alice 🔹 2. Arrow Functions Arrow functions offer a shorter syntax and lexical this binding, commonly used in Angular for callbacks and concise logic. ✅ Basic Syntax const multiply = (x: number, y: number): number => { return x * y; }; consol...

Classes and Objects in TypeScript Classes and Objects in TypeScript Awesome! Let's now cover Classes and Objects in TypeScript, which are at the core of building services, components, and models in Angular. 🔹 1. What is a Class? A class is a blueprint for creating objects. It encapsulates data (properties) and behavior (methods). ✅ Basic Syntax class Person { name: string; age: number; constructor(name: string, age: number) { this.name = name; this.age = age; } greet(): void { console.log(`Hello, my name is ${this.name}`); } } 🔹 2. Creating an Object You can create objects (instances) from a class using the new keyword. const person1 = new Person("Alice", 30); person1.greet(); // Output: Hello, my name is Alice 🔹 3. Access Modifiers Modifier Description ...

What is SQL Server? Microsoft SQL Server is a relational database management system (RDBMS) developed by Microsoft. It is designed to store, retrieve, manage, and analyze structured data efficiently. SQL Server uses Structured Query Language (SQL) to interact with databases and supports transaction processing, business intelligence (BI), and analytics applications . SQL Server operates on a client-server architecture , where clients (applications) send queries to the SQL Server, which processes the requests and returns the results. Why Use SQL Server? SQL Server is widely used due to its robust performance, security, scalability, and integration with Microsoft products. Here are the key reasons to use SQL Server: 1. Reliability & Performance Optimized Query Execution : SQL Server includes a query optimizer that improves execution speed for complex queries. In-Memory Processing : Features like In-Memory OLTP significantly improve transaction processing spee...

1️⃣ What is .NET? 🔹 .NET (Dotnet) is a free, open-source, cross-platform framework developed by Microsoft for building various types of applications, including: Web Applications Desktop Applications Cloud Services Mobile Apps Game Development IoT Applications 🔹 Key Characteristics of .NET ✅ Cross-platform – Runs on Windows, macOS, and Linux ✅ Language Interoperability – Supports multiple languages, including C#, F#, and VB.NET ✅ High Performance – Optimized runtime for fast execution ✅ Managed Code – Uses the Common Language Runtime (CLR) ✅ Automatic Memory Management – Uses Garbage Collection (GC) 2️⃣ Evolution of .NET .NET Framework (2002) – The original, Windows-only version .NET Core (2016) – A cross-platform, modular, open-source version .NET 5+ (2020-Present) – A unified platform (merging .NET Framework and .NET Core) 🔹 Current Version : .NET 8 (Latest as of 2024) 🔹 Major Components of .NET .NET Runtime – Execut...

What is Cloud Computing? 🌩️ What is Cloud Computing? Cloud Computing is the on-demand delivery of computing services —including servers, storage, databases, networking, software, analytics, and more— over the internet ("the cloud") . Instead of owning and maintaining physical data centers or servers, individuals and organizations can rent computing power and storage from cloud providers. 🚀 Key Characteristics Feature Description On-Demand Self-Service Users can provision resources as needed without human interaction. Broad Network Access Services are accessible over the internet from various devices. Resource Pooling Providers serve multiple customers using a multi-tenant model. Rapid Elasticity Resources can be scaled u...

Variables, Data Types, and Interfaces in Angular (TypeScript) Variables, Data Types, and Interfaces in Angular (TypeScript) These are foundational concepts that make your Angular app type-safe, scalable, and easier to maintain. 🔹 1. Variables in TypeScript TypeScript is strongly typed, so you can (and should) define the type of your variables. ✅ Syntax: let name: string = "Angular"; const version: number = 17; var isAwesome: boolean = true; 🔄 `let` vs `const` vs `var`: Keyword Scope Reassignable Hoisted `let` Block ✅ Yes ❌ No `const` Block ❌ No ❌ No `var` Function ✅ Yes ✅ Yes 🔹 2. Data Types in TypeScript ...

Creating Your First ASP.NET Core Application Creating Your First ASP.NET Core Application 🚀 In this guide, you'll learn how to create, run, and test your first ASP.NET Core application using .NET SDK, Visual Studio, or VS Code . 🔹 1️⃣ Prerequisites Before you begin, ensure you have the following installed: ✅ .NET SDK ( Download ) ✅ Visual Studio 2022 (Community Edition) ( Download ) ✅ OR Visual Studio Code ( Download ) ✅ C# Extension for VS Code 🔹 2️⃣ Create an ASP.NET Core Web Application 🛠 Option 1: Using .NET CLI (Command Line Interface) 1️⃣ Open a terminal or command prompt 2️⃣ Run the following command to create a new web application: dotnet new web -o MyFirstAspNetApp cd MyFirstAspNetApp 3️⃣ Open the project in VS Code (Optional) code . 🛠 Option 2: Using Visual Studio 1️⃣ Ope...

Installing .NET SDK & Setting Up Visual Studio or VS Code Installing .NET SDK & Setting Up Visual Studio or VS Code 🔹 1️⃣ Install .NET SDK What is .NET SDK? The .NET SDK (Software Development Kit) includes everything you need to build and run .NET applications , including: ✅ .NET CLI (Command Line Interface) ✅ Runtime and Libraries ✅ Build Tools and Compiler 🛠 Step 1: Download & Install .NET SDK 1️⃣ Go to the official .NET download page: https://dotnet.microsoft.com/download 2️⃣ Select the latest version of .NET SDK (e.g., .NET 8.0 ). 3️⃣ Choose your OS: Windows: Download the .exe installer. Mac: Download the .pkg file. Linux: Follow the terminal commands provided on the website. 4️⃣ Run the installer and follow the setup instructions. ...