Blazor Component with Cascading Parameter - Blazor-wasm Typing CST Test

Primary Use Cases

• ▸Interactive single-page applications (SPAs) with C#
• ▸Line-of-business applications requiring .NET libraries
• ▸Client-side applications with offline capabilities
• ▸Web apps needing tight integration with ASP.NET Core backends
• ▸Modern web UI replacement for WinForms/WPF apps

Notable Features

• ▸Client-side execution using WebAssembly
• ▸Component-based UI architecture
• ▸Full access to .NET runtime libraries in the browser
• ▸Integration with ASP.NET Core for API calls and authentication
• ▸Support for dependency injection and routing

Origin & Creator

Blazor was developed by Microsoft, first introduced in 2018, with WebAssembly support added to enable fully client-side .NET applications.

Industrial Note

Blazor WASM is ideal for enterprises and developers invested in the Microsoft ecosystem who want C# web development without relying on JavaScript frameworks.

Quick Explain

• ▸Blazor WASM enables full-stack C# development, running .NET code in the browser.
• ▸Uses WebAssembly to compile .NET IL (Intermediate Language) into a binary format that browsers can execute.
• ▸Supports component-based architecture, enabling reusable UI elements.
• ▸Integrates seamlessly with .NET ecosystem, including libraries, dependency injection, and tooling.
• ▸Runs entirely client-side, reducing server load and enabling offline capabilities.

Core Features

• ▸Razor components for UI development
• ▸Two-way data binding
• ▸Event handling in C# instead of JavaScript
• ▸JavaScript interop for accessing browser APIs
• ▸Lazy loading and modular assemblies to reduce payload

Learning Path

• ▸Learn C# and .NET fundamentals
• ▸Understand Razor syntax and components
• ▸Explore Blazor component lifecycle
• ▸Integrate with ASP.NET Core backend
• ▸Build sample SPA applications

Practical Examples

• ▸To-do application with local storage
• ▸Client-side dashboard with charts and API integration
• ▸Form-based enterprise application
• ▸Offline-capable PWA
• ▸Interactive data visualization with Blazor components

Comparisons

• ▸Blazor WASM vs React: Blazor uses C#, React uses JS/TS
• ▸Blazor WASM vs Angular: Blazor SPA runs in .NET runtime, Angular compiles to JS
• ▸Blazor WASM vs Vue.js: Blazor integrates with .NET ecosystem natively
• ▸Blazor WASM vs Blazor Server: WASM runs client-side, Server runs on backend
• ▸Blazor WASM vs JS frameworks: Strong typing and tooling with C#

Strengths

• ▸Leverages existing .NET skills and libraries
• ▸C# code runs natively in the browser via WebAssembly
• ▸Component reuse between server-side and client-side Blazor
• ▸Strong Microsoft tooling support (Visual Studio, CLI, debugging)
• ▸Secure execution sandboxed in the browser

Limitations

• ▸Initial download size can be large compared to JS frameworks
• ▸Browser compatibility depends on WebAssembly support (modern browsers only)
• ▸SEO is challenging without prerendering
• ▸Limited ecosystem compared to JavaScript frameworks
• ▸Client-side execution may not be ideal for CPU-intensive tasks

When NOT to Use

• ▸Applications needing SEO without prerendering
• ▸Very large-scale SPAs requiring minimal payload
• ▸Browsers without WebAssembly support
• ▸CPU-intensive client-side computations
• ▸Projects without .NET developer expertise

Cheat Sheet

• ▸dotnet new blazorwasm - create a new Blazor WASM project
• ▸dotnet run - run project locally
• ▸@code { } - define component logic in Razor file
• ▸@inject - inject service into component
• ▸NavigationManager.NavigateTo() - programmatic navigation

FAQ

• ▸Is Blazor WASM free?
• ▸Yes - open-source as part of .NET runtime.
• ▸Does Blazor run on all browsers?
• ▸Modern browsers with WebAssembly support are required.
• ▸Can I use existing .NET libraries?
• ▸Yes - compatible libraries can run in WASM.
• ▸How is authentication handled?
• ▸Via ASP.NET Core Identity, JWT, or external providers.
• ▸Can Blazor WASM work offline?
• ▸Yes - using PWA caching and local storage.

30-Day Skill Plan

• ▸Week 1: C# and .NET basics
• ▸Week 2: Razor components and data binding
• ▸Week 3: API integration and DI
• ▸Week 4: JavaScript interop and advanced components
• ▸Week 5: PWA features and deployment optimization

Final Summary

• ▸Blazor WASM enables client-side web apps using C# and .NET.
• ▸Runs in the browser via WebAssembly with full .NET support.
• ▸Component-based architecture allows reusable UI blocks.
• ▸Integrates with ASP.NET Core for API, auth, and backend services.
• ▸Ideal for .NET developers building SPAs without JavaScript.

Project Structure

• ▸wwwroot/ - static assets (JS, CSS, images)
• ▸Pages/ - Razor components mapped to routes
• ▸Shared/ - reusable components and layouts
• ▸Program.cs - application entry point and DI configuration
• ▸_Imports.razor - global using directives
• ▸App.razor - root component defining router and layout

Monetization

• ▸Enterprise applications as SaaS
• ▸Internal line-of-business tools
• ▸Progressive web apps for clients
• ▸Interactive dashboards and analytics portals
• ▸Cross-platform web applications replacing desktop clients

Productivity Tips

• ▸Reuse components across projects
• ▸Use dependency injection for shared services
• ▸Leverage existing .NET libraries
• ▸Optimize lazy loading and bundling
• ▸Use Visual Studio/VS Code productivity extensions

Basic Concepts

• ▸Razor Component - UI element written in C# and Razor syntax
• ▸Binding - two-way connection between UI and data model
• ▸Event Callback - handles user interactions in C#
• ▸Dependency Injection - inject services into components
• ▸Routing - navigate between components in SPA

Official Docs

• ▸https://learn.microsoft.com/en-us/aspnet/core/blazor/?view=aspnetcore-8.0
• ▸https://dotnet.microsoft.com/apps/aspnet/web-apps/blazor