from cshtml

@if (Model.Product.Approved != true)
{
    @if ((await AuthorizationService.AuthorizeAsync(
    User, Model.Product, ProductOperations.Approve)).Succeeded)
    {
        <form style="display:inline;" method="post">
            <input type="hidden" name="id" value="@Model.Product.ProductID" />
            <input type="hidden" name="approved" value="@true" />
            <button type="submit" class="btn btn-xs btn-success">Approve</button>
        </form>
    }
}

if (Model.Product.Approved != false)
{
    @if ((await AuthorizationService.AuthorizeAsync(
    User, Model.Product, ProductOperations.Reject)).Succeeded)
    {
        <form style="display:inline;" method="post">
            <input type="hidden" name="id" value="@Model.Product.ProductID" />
            <input type="hidden" name="approved" value="@false" />
            <button type="submit" class="btn btn-xs btn-success">Reject</button>
        </form>
    }
}

from razor page

 public async Task<IActionResult> OnPostAsync(int id, bool approved)
        {
            var product = await Context.Product.FirstOrDefaultAsync(
                                                      m => m.ProductID == id);

            if (product == null)
            {
                return NotFound();
            }

            product.Approved = approved;
            Context.Product.Update(product);
            await Context.SaveChangesAsync();

            return RedirectToPage("./Index");
        }