Dynamic component in Blazor with Example
Blazor, a cutting-edge framework from Microsoft, enables developers to craft interactive web applications using C#. One of the standout features of Blazor is its ability to handle dynamic components. This powerful capability allows developers to render different components at runtime based on various conditions, enhancing the flexibility and interactivity of applications.
Dynamic components in Blazor refer to components that can be instantiated and rendered at runtime. This means you can choose which component to display based on user interactions, application state, or other runtime conditions. This is especially useful in scenarios where the UI needs to adapt dynamically.
Open Microsoft Visual Studio 2022 => Create Blazor Server side application.
First, let's create a few simple child components that will be dynamically rendered.
ComponentA.razor
<h3>Component A</h3>
<p>This is Component A.</p>
ComponentB.razor
<h3>Component B</h3>
<p>This is Component B.</p>
These components serve as the potential candidates for dynamic rendering.
Next, create a component that will render these child components dynamically based on user interaction or any other condition.
DynamicComponentContainer.razor
@page "/dynamic"
<h3>Dynamic Component Container</h3>
<button @onclick="ShowComponentA">Show Component A</button>
<button @onclick="ShowComponentB">Show Component B</button>
<DynamicComponent Type="currentComponentType" />
@code {
private Type currentComponentType;
private void ShowComponentA()
{
currentComponentType = typeof(ComponentA);
}
private void ShowComponentB()
{
currentComponentType = typeof(ComponentB);
}
}
In this component:
Two buttons allow switching between ComponentA and ComponentB.
The DynamicComponent is used to render the component specified by currentComponentType.
Blazor provides the DynamicComponent feature, enabling the dynamic rendering of components. The DynamicComponent is part of the Microsoft.AspNetCore.Components namespace, ensuring it's seamlessly integrated into your Blazor project.
Button Click Handlers: Methods ShowComponentA and ShowComponentB set the currentComponentType to either ComponentA or ComponentB.
DynamicComponent: This built-in Blazor component takes the Type parameter, which specifies the component type to be rendered.
Benefits of Using Dynamic Components:
Flexibility: Dynamic components allow you to adapt the UI at runtime, providing a more responsive user experience.
Reusability: Components can be reused in different contexts without hard-coding their usage, promoting modularity.
Dynamic UI Updates: Components can react to changes in application state or user input, improving interactivity.
Real-World Applications:
Dashboards: Dynamically render different widgets or components based on user roles, preferences, or settings.
Forms: Display different forms or input fields based on the context, such as user type or step in a multi-step form.
Content Management: Load various content types dynamically, such as text, images, or videos, based on user selection or data-driven conditions.
Dynamic components in Blazor offer a powerful way to create flexible and adaptive user interfaces. By leveraging this feature, developers can build applications that dynamically respond to user interactions and application state changes, enhancing the overall user experience. Whether you are developing dashboards, forms, or content management systems, dynamic components are a vital tool in your Blazor arsenal.
