Introduction to .NET Blazor

Blazor is a framework for building web applications using C# and .NET. It allows developers to create interactive web UIs using C# instead of JavaScript, making it a great choice for those who are already familiar with the C# language and the .NET ecosystem.

One of the most exciting features of Blazor is its ability to run C# code directly in the browser using WebAssembly. This means that you can use C# to create client-side logic and interact with the DOM, instead of having to rely on JavaScript. This allows for a more seamless development experience, as you can use the same language and tools for both the client and server side of your application.

Here's an example of how to create a simple counter component in Blazor:

<button class="btn btn-primary" @onclick="IncrementCount">Click me

You've clicked the button @count times.

@code {
    private int count = 0;

    private void IncrementCount()
    {
        count++;
    }
}

In the above example, we have a button and a paragraph element. When the button is clicked, the IncrementCount method is called, which increments the count variable by 1. This updates the text displayed in the paragraph element to show the updated number of clicks.

Another advantage of Blazor is its support for real-time communication. The framework includes built-in support for WebSockets, which allows for real-time updates and interactions between the client and server. This is especially useful for building applications that need to update frequently, such as chat apps or online multiplayer games.

Here's an example of how to create a simple real-time chat application using Blazor:

<input @bind="message" @keyup="SendMessage" placeholder="Type a message" />
<ul>
    @foreach (var item in messages)
    {
        <li>@item</li>
    }
</ul>

@code {
    private string message;
    private List<string> messages = new List<string>();

    private async Task SendMessage(KeyboardEventArgs e)
    {
        if (e.Key == "Enter")
        {
            await ChatHub.SendMessage(message);
            message = string.Empty;
        }
    }

    protected override async Task OnConnectedAsync()
    {
        await ChatHub.OnConnectedAsync(this);
    }

    protected override async Task OnDisconnectedAsync(Exception exception)
    {
        await ChatHub.OnDisconnectedAsync(this);
    }
}

In this example, we have an input field and a list element to display the messages. When the user types a message and press enter, the SendMessage method is called which sends the message to the server using SignalR. The server then broadcast the message to all connected clients, updating the list element to show the new message.

Blazor also provides a variety of pre-built UI components, such as buttons, forms, and data grids, which can be easily added to your application. These components are built using a combination of C# and Razor, a markup language that allows you to embed C# code within HTML. This makes it easy to create dynamic, interactive UIs using a familiar, declarative syntax.

In summary, Blazor is a powerful and versatile framework for building

References:

https://nishanc.medium.com/getting-started-with-blazor-on-net-core-3-1-c1a986aaa69b

https://medium.com/multinetinventiv/introduction-to-blazor-e6fab0800486