Forem: Chandradev

10 Blazor Coding Mistakes I See in Real Projects (and How to Avoid Them)

Chandradev — Wed, 17 Dec 2025 10:47:31 +0000

Blazor is a powerful framework, but most problems in real-world applications are not framework issues — they are coding standard issues.

After working on multiple production Blazor applications, here are 10 common mistakes that quietly hurt performance, maintainability, and scalability — and how to avoid them.

1. Putting Business Logic Directly in .razor Files

As projects grow, .razor files often turn into a mix of UI and business logic.

Why this is a problem:
• Difficult to test
• Hard to maintain
• Bloated components

Better approach:
• Use code-behind files (.razor.cs)
• Move logic into services and inject them

2.Razor files should focus on UI, not business rules.

Inconsistent or Poor Naming Conventions

Names like Test.razor, Page1.razor, or DoStuff() don’t scale.

Better approach:
• Use intention-revealing names such as InvoiceList.razor or UserProfileCard.razor
• Follow consistent naming rules across the project

Good naming reduces cognitive load immediately.

3.Copy-Pasting Logic Across Components

Duplicated logic is one of the fastest ways to introduce bugs.

Better approach:
• Extract shared logic into services
• Use dependency injection properly

Blazor’s DI system exists for a reason — use it.

4. Incorrect State Management

State-related bugs are subtle and painful.

Common issues:
• Overusing static state
• Misusing singleton services
• Losing state on refresh (especially in WASM)

Better approach:
• Understand component lifecycle
• Choose scoped vs singleton services intentionally
• Persist important state explicitly

State should be intentional, not accidental.

5. Calling APIs Directly From Components Everywhere

Direct API calls inside components create tight coupling.

Problems:
• Hard to test
• Hard to refactor
• Inconsistent error handling

Better approach:
• Create an API service layer
• Centralize retries, logging, and error handling

6.Not Handling Errors Gracefully

Unhandled exceptions can break the entire Blazor UI.

Common mistakes:
• No try/catch around async calls
• No user-friendly error messages

Better approach:
• Handle exceptions intentionally
• Use error boundaries
• Log errors properly

7.Poor Folder Structure

Flat folder structures work only for demos.

Better approach:
• Use feature-based folders
• Separate Pages, Components, Services, and Models

Folder structure is a form of documentation.

8. Ignoring Performance Basics

Most Blazor performance problems are self-inflicted.

Common causes:
• Heavy logic in OnAfterRenderAsync
• Unnecessary re-rendering
• Large component trees

Better approach:
• Minimize re-renders
• Use @key correctly
• Measure before optimizing

9. Hardcoding Configuration Values

Hardcoded URLs and keys appear far too often.

Better approach:
• Use appsettings.json
• Environment-specific configuration
• Never store secrets in UI code

Treating Blazor Like a JavaScript Framework

10.Blazor is not React or Angular.

Better approach:
• Embrace C# and .NET strengths
• Use strong typing and services
• Leverage the .NET ecosystem

I Just Published My New Book: Blazor 10 Coding Standards & Best Practices

Chandradev — Fri, 12 Dec 2025 15:22:09 +0000

I’m excited to share that my new book, Blazor 10 Coding Standards & Best Practices, is now available on Amazon Kindle!
📘 https://www.amazon.com/dp/B0G5PQP74R

This book is a practical guide for writing clean, scalable, and maintainable Blazor applications — based on real-world experience with Blazor Server, WebAssembly, and the new Blazor 10 architecture.

🎯 Why I Wrote This Book

After reviewing multiple Blazor codebases and helping developers solve recurring issues, I noticed the same patterns:

components becoming too large
inconsistent naming
misuse of lifecycle methods
unpredictable rendering
unnecessary re-renders
mixing UI, business logic, and EF Core
poor state management

Blazor gives developers a lot of flexibility, but without standards, code quality quickly becomes inconsistent.

I wrote this book to provide the clear, practical, real-world guidelines I wish I had when I started with Blazor.

📘 What’s Inside the Book?

Here’s a quick look at what the book covers:

🔹 Clean Component Architecture

How to structure components, avoid “God components,” and build maintainable UIs.

🔹 Naming Conventions

Standards for naming components, parameters, methods, services, files, and folders — essential for clean code.

🔹 Rendering & Performance Rules

When to use @key, how to prevent unnecessary renders, and how to avoid expensive operations in markup.

🔹 Lifecycle Best Practices

How to properly use OnInitialized, OnParametersSet, OnAfterRender, and more.

🔹 State Management Patterns

Simple rules for handling local state, cascading values, and shared service state.

🔹 API & EF Core Usage

Typed HttpClient, proper async usage, DTO separation, query best practices, and error handling.

🔹 JSInterop Guidelines

Safe integration with JavaScript and how to avoid memory leaks.

🔹 Security Standards

Common Blazor security pitfalls and how to avoid them.

🔹 Reusable Component Patterns

RenderFragment templates, dynamic components, and metadata-driven UI design.

🔹 100-Point Blazor Code Review Checklist

A complete checklist you can apply to your own codebase or team projects.

👨‍💻 Who This Book Is For

This book is for:

Blazor developers
.NET developers building modern web UIs
Teams adopting Blazor in enterprise apps
Freelancers, consultants, and SaaS builders
Anyone who wants to write cleaner Blazor code

If you’re building anything serious with Blazor, this guide will help you avoid common pitfalls and write professional-grade code.

📖 Get the Book

👉 Blazor 10 Coding Standards & Best Practices
📘 https://www.amazon.com/dp/B0G5PQP74R

I hope this book becomes a helpful reference for your Blazor journey.
Let me know your thoughts — I would love your feedback and suggestions for future editions!

— Chandradev Prasad

🚀 I Just Published My First Book — Learn OpenAI in Blazor with Examples

Chandradev — Sat, 02 Aug 2025 05:14:36 +0000

Hey developers! 👋

I'm thrilled to share that my new book Learn OpenAI in Blazor with Examples is now live on Amazon.

As someone who's worked with C# and Blazor for years, I always wanted to explore how AI could be practically integrated into real-world web apps. This book is a result of that passion — and it’s packed with hands-on examples to help fellow developers bring AI into their Blazor projects using OpenAI.

📘 What the Book Covers
This isn't just theory. You'll build full AI-powered features step by step:

✅ Text completion using OpenAI’s GPT models

💬 ChatGPT-style bot interface with markdown rendering

🧠 Resume and LinkedIn bio generators

🧾 Business copywriting tools

🔍 In-memory semantic search using OpenAI Embeddings

🔁 A simple RAG (Retrieval-Augmented Generation) pipeline

🎨 Logo and image generation using DALL·E

🎨 Color palette generation based on mood or description

📝 Markdown article generator with preview/export

🧑‍⚖️ Persona-based responses (e.g., Lawyer, Developer, Marketer)

All implemented in Blazor (WebAssembly & Server) using C# — no Python or heavy ML frameworks needed.

📦 Where to Get It
🇺🇸 Buy on Amazon USA: https://a.co/d/3DR8Tmi
🇮🇳 Buy on Amazon India: https://amzn.in/d/4t6neym

💬 Final Thoughts

If you're a .NET or Blazor developer interested in AI but overwhelmed by machine learning concepts, this book is a practical gateway. You'll build things. You'll learn by doing. And you’ll see that AI integration is much more accessible than you think.

Let me know what you think — and if you've ever tried combining Blazor with GPT, DALL·E, or embeddings, I’d love to hear about your experience too!