How do you send an HTTP GET request using HttpClient in Blazor?

An HTTP GET request can be sent to get a resource from the API server using the GetJsonAsync() method provided by the HttpClient class.

CSHTML

@page "/employee"
@inject HttpClient Http

.. .. .. .. .. .. 
.. .. .. .. .. ..

@code {
        Employee[] empList;

        protected override async Task OnInitializedAsync()
        {
            empList = await Http.GetJsonAsync<Employee[]>("/api/Employee/Index");
        }
}

WEB API

[HttpGet]
[Route("api/Employee/Index")]
public IEnumerable<Employee> Index()
{
    return employee.GetAllEmployees();
}

I would suggest you check the below link for better understanding:
https://medium.freecodecamp.org/how-to-create-an-application-using-blazor-and-entity-framework-core-1c1679d87c7e