With tag helpers you could define an area where you could easily write content. For example, i could make a bootstrap card tag helper and easily render whatever i want inside the card body tag. With razor components how can i achieve this?
<div class="card">
<div class="card-header"></div>
<div class="card-body">
@*render content here*@
</div>
</div>
Templated components can be implemented using a class called RenderFragment. They are implement same like a parameter property but they capture the content declared inside the component tags.
Below is an example from the default Blazor project. I updated the SurveyPrompt component to take in the question content like this
<div class="alert alert-secondary mt-4" role="alert">
<span class="oi oi-pencil mr-2" aria-hidden="true"></span>
<strong>@Title</strong>
<span class="text-nowrap">
@ChildContent
<a target="_blank" class="font-weight-bold" href="https://go.microsoft.com/fwlink/?linkid=2127996">brief survey</a>
</span>
</div>
@code {
[Parameter]
public string Title { get; set; }
[Parameter]
public RenderFragment ChildContent { get; set; }
}
Here is how i pass the content to the Survey component
<SurveyPrompt Title="How is Blazor working for you?">
<i class="carousel-control-next-icon"></i>Please take our survey below
</SurveyPrompt>
You can also have the RenderFragment typed, read more about it here: https://learn.microsoft.com/en-us/aspnet/core/blazor/templated-components?view=aspnetcore-3.1
Just to add to Gopa's answer. You can also use multiple RanderFragment properties and specify the property name as the HTML tag to distinguish between them.
@*StoryComponent*@
<div>
<span>@this.Title</span><br>
<span>@this.Body</span>
</div>
@code {
[Parameter] public string Title { get; set; }
[Parameter] public string Body{ get; set; }
}
Usage would be:
<StoryComponent>
<Title>Title ABC</Title>
<Body>Body 123</Body>
</StoryComponent>
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