EditCatalogItem.cshtml.cs

using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.eShopWeb.ApplicationCore.Constants;
using Microsoft.eShopWeb.Web.Interfaces;
using Microsoft.eShopWeb.Web.ViewModels;

namespace Microsoft.eShopWeb.Web.Pages.Admin;

[Authorize(Roles = BlazorShared.Authorization.Constants.Roles.ADMINISTRATORS)]
public class EditCatalogItemModel : PageModel
{
    private readonly ICatalogItemViewModelService _catalogItemViewModelService;

    public EditCatalogItemModel(ICatalogItemViewModelService catalogItemViewModelService)
    {
        _catalogItemViewModelService = catalogItemViewModelService;
    }

    [BindProperty]
    public CatalogItemViewModel CatalogModel { get; set; } = new CatalogItemViewModel();

    public void OnGet(CatalogItemViewModel catalogModel)
    {
        CatalogModel = catalogModel;
    }

    public async Task<IActionResult> OnPostAsync()
    {
        if (ModelState.IsValid)
        {
            await _catalogItemViewModelService.UpdateCatalogItem(CatalogModel);
        }

        return RedirectToPage("/Admin/Index");
    }
}