C# Blazor: How to use @typeparam in Code behind? (with workaround)

Question

In a Blazor .razor file you can use @typeparam MyType to use generic parameters. For example:

MyComponent.razo

Answer 1

You were pretty close, just need to add partial to the class definition:

using Microsoft.AspNetCore.Components;

namespace BlazorApp1.Components
{
    public partial class MyCustomComponent<T> : ComponentBase
    {
        [Parameter]
        public string Label { get; set; }
    }
}

The Razor part:

@namespace BlazorApp1.Components
@typeparam T

<label>@($"{Label}. Provided type is {typeof(T).Name.ToUpper()}")</label>

The usage (Index.razor):

@page "/"
@using BlazorApp1.Components

<MyCustomComponent T="long" Label="Custom component label" />

This way, you wouldn't need inheriting your component from it, as both become parts of the same class.