Blazor Razor Components

Blazor Razor Components allow developers to build interactive web interfaces using C# instead of JavaScript. These components are based on Razor syntax and can be run on the server or in the browser via WebAssembly.

Syntax

Blazor Razor Components are built using a combination of Razor syntax and C#. Components are defined in .razor files that contain both markup and code. The structure of a Razor component looks like this:

<component>
    @code {
        // component code
    }
</component>

The @code block contains the component's C# code, and the component's markup is defined inside the <component> tag.

Example

Here's an example of a simple Razor component that displays a message when a button is clicked:

<MyButtonComponent></MyButtonComponent>

@code {
    private bool buttonClicked = false;

    private void OnButtonClick()
    {
        buttonClicked = true;
    }
}

<component>
    <button onclick="@OnButtonClick">Click Me</button>
    <p>@(buttonClicked ? "Button clicked!" : "")</p>
</component>

Output

When this component is rendered in the browser, it displays a button with the text "Click Me" and a paragraph that says "Button clicked!" when the button is clicked.

Explanation

In the example above, we define a component called MyButtonComponent. The @code block contains two methods: OnButtonClick, which sets the buttonClicked variable to true, and the component's constructor, which initializes the buttonClicked variable to false.

The markup for this component includes a button with an onclick attribute that calls the OnButtonClick method when clicked. The p tag displays the "Button clicked!" message when the buttonClicked variable is true.

Use

Blazor Razor Components can be used in any ASP.NET Core web project. To create a new Razor component, simply add a new .razor file to your project and define your component using Razor syntax and C#.

Important Points

• Blazor Razor Components allow you to build interactive web interfaces using C# instead of JavaScript.
• Razor components are defined in .razor files that contain both markup and code.
• The @code block contains the component's C# code.
• Razor components can be run on the server or in the browser via WebAssembly.

Summary

Blazor Razor Components provide a powerful alternative to traditional JavaScript-based web development. By allowing developers to use C# and Razor syntax, they can build rich, interactive web interfaces that are easier to build and maintain. With support for both server and client-side rendering, Blazor Razor Components are a versatile tool for building modern web applications.