From Angular to Blazor: Unleashing the C# Magic!
Tags: csharp, blazor, angular, dotnet
Published: 2023-11-09 19:20:41


Embarking on the journey of migrating an Angular component to a Blazor component is an exhilarating adventure that promises not only a change in syntax but a transformative shift in the way you approach web development. As you step into the world of Blazor, powered by the robust C# language and the expansive .NET ecosystem, you're not just migrating code; you're unlocking a realm of possibilities that seamlessly blend client and server-side logic.

Imagine the thrill of translating your Angular masterpiece into a Blazor gem, where the familiar dances with the novel, and where the precision of C# orchestrates the symphony of your web application. This migration isn't merely a technical transition; it's an opportunity to leverage the full spectrum of .NET capabilities, from razor-sharp data binding to the elegance of C# event handling.

So, fasten your seatbelt and get ready to witness the fusion of Angular's dynamism with Blazor's C# prowess. In this exhilarating guide, we'll navigate through each step of the migration process, unveiling the magic that happens when you bring the best of both worlds together. Get ready for a coding adventure that will not only elevate your skill set but also inject a burst of excitement into your development journey. Let the migration begin!

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ojds74165a34gqieo973.jpg)

Migrating from Angular to Blazor can be an exciting journey, and it's essential to understand the steps involved. Blazor is a web framework by Microsoft that allows developers to build interactive web applications using C# instead of JavaScript. Here's a step-by-step guide on how to migrate an Angular component to a Blazor component:

### Step 1: Understand the Basics of Blazor

Before you start the migration process, it's crucial to have a basic understanding of Blazor. Blazor supports both client-side (WebAssembly) and server-side rendering. Make sure to choose the approach that best fits your project requirements.

### Step 2: Install Blazor Project Template

If you haven't already, install the Blazor project template using the .NET CLI. Open a terminal and run the following command:

```bash
dotnet new -i Microsoft.AspNetCore.Components.Web.Templates::3.0.0-preview9.19465.2
```

Then, create a new Blazor project:

```bash
dotnet new blazor -n YourBlazorApp
```

### Step 3: Create a Blazor Component

Create a new Blazor component to replace the Angular component. Blazor components have a similar structure to Razor views. You can use the `.razor` file extension. For example, create a file named `MyBlazorComponent.razor`.

### Step 4: Port HTML and CSS

Copy the HTML and CSS code from your Angular component to the new Blazor component. Since Blazor uses Razor syntax for components, you might need to make some adjustments to the HTML, especially if it includes Angular-specific directives or bindings.

### Step 5: Update Data Binding

Blazor uses C# for data binding instead of Angular's two-way data binding. Update the data binding logic in your Blazor component using C# syntax. For example, if you had Angular code like:

```html
<input [(ngModel)]="name" />
```

In Blazor, you would bind it like:

```csharp
<input @bind="name" />
```

### Step 6: Replace Angular Services with .NET Services

If your Angular component relies on services, you'll need to replace them with .NET services in Blazor. Create corresponding service classes in your Blazor project and inject them into the component using dependency injection.

### Step 7: Update Event Handling

Update event handling in your Blazor component using C# event handlers instead of Angular event bindings. For example, replace `(click)="handleClick()"` in Angular with `@onclick="HandleClick"` in Blazor.

### Step 8: Migrate Routing

If your Angular component is part of a larger application with routing, you'll need to migrate the routing logic to Blazor. Blazor uses `@page` directive for routing.

### Step 9: Test and Debug

Thoroughly test your migrated Blazor component. Use the browser's developer tools and Visual Studio debugging tools to identify and fix any issues that may arise during the migration process.

### Step 10: Gradual Migration

Consider a gradual migration approach if your application is extensive. You can migrate one component at a time, testing and validating each step to ensure a smooth transition.

### Let's Begin Our Migration

Let's add a simple example to illustrate the migration process. Suppose you have an Angular component that displays a list of items with a search functionality. Here's how you might migrate it to a Blazor component:

### Angular Component (Original)

```html
<!-- app.component.html -->
<div>
  <input [(ngModel)]="searchTerm" placeholder="Search items" />
</div>

<ul>
  <li *ngFor="let item of filteredItems">{{ item.name }}</li>
</ul>
```

```typescript
// app.component.ts
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  items = [
    { name: 'Item 1' },
    { name: 'Item 2' },
    { name: 'Item 3' },
    // ... more items
  ];

  searchTerm: string = '';

  get filteredItems() {
    return this.items.filter(item => item.name.toLowerCase().includes(this.searchTerm.toLowerCase()));
  }
}
```

### Blazor Component (Migrated)

```csharp
<!-- MyBlazorComponent.razor -->
<div>
  <input @bind="searchTerm" placeholder="Search items" />
</div>

<ul>
  @foreach (var item in filteredItems)
  {
    <li>@item.Name</li>
  }
</ul>

@code {
  List<Item> items = new List<Item>
  {
    new Item { Name = "Item 1" },
    new Item { Name = "Item 2" },
    new Item { Name = "Item 3" },
    // ... more items
  };

  string searchTerm = "";

  List<Item> filteredItems => items
    .Where(item => item.Name.ToLower().Contains(searchTerm.ToLower()))
    .ToList();

  public class Item
  {
    public string Name { get; set; }
  }
}
```

In this example:

1. The HTML structure remains similar, but the syntax and data binding differ.

2. The Angular two-way binding `[(ngModel)]` is replaced with `@bind` in Blazor.

3. Angular's `*ngFor` directive is replaced with `@foreach` in Blazor.

4. The event handling and data binding in the code block (`@code`) use C# syntax in the Blazor component.

5. Angular's TypeScript class is replaced with a C# class in Blazor.

This is a simplified example, but it captures the essence of migrating a basic component from Angular to Blazor. Keep in mind that more complex applications may require additional considerations and adjustments.

### Conclusion

Migrating from Angular to Blazor involves understanding the differences in syntax, data binding, and architecture. By following these steps, you can successfully migrate your Angular component to a Blazor component, taking advantage of the benefits that Blazor and the .NET ecosystem offers.