I'm new to Blazor and the next issue I'm having is trying to bind dynamic data from a lookup table onto an InputSelect deal
Here's the Create Code:
@page "/movies/create"@rendermode InteractiveServer@using Microsoft.EntityFrameworkCore@using BlazorWebAppMovies.Models@using BlazorWebAppMovies.Data@inject IDbContextFactory<BlazorWebAppMovies.Data.BlazorWebAppMoviesContext> DbFactory@inject NavigationManager NavigationManager<PageTitle>Create</PageTitle><h1>Create</h1><h2>Movie</h2><hr /><div class="row"><div class="col-md-4"><EditForm method="post" Model="Movie" OnValidSubmit="AddMovie" FormName="create" Enhance><DataAnnotationsValidator /><ValidationSummary class="text-danger" role="alert"/><div class="mb-3"><label for="title" class="form-label">Title:</label> <InputText id="title" @bind-Value="Movie.Title" class="form-control" /> <ValidationMessage For="() => Movie.Title" class="text-danger" /> </div> <div class="mb-3"><label for="releasedate" class="form-label">Release Date:</label> <InputDate id="releasedate" @bind-Value="Movie.ReleaseDate" class="form-control" /> <ValidationMessage For="() => Movie.ReleaseDate" class="text-danger" /> </div> <div class="mb-3"><label for="genre" class="form-label">Genre:</label> <InputText id="genre" @bind-Value="Movie.Genre" class="form-control" /> <ValidationMessage For="() => Movie.Genre" class="text-danger" /> </div> <div class="mb-3"><label for="price" class="form-label">Price:</label> <InputNumber id="price" @bind-Value="Movie.Price" class="form-control" /> <ValidationMessage For="() => Movie.Price" class="text-danger" /> </div><div class="mb-3"><label for="rating" class="form-label">Rating:</label><InputText id="rating" @bind-Value="Movie.Rating" class="form-control" /><ValidationMessage For="() => Movie.Rating" class="text-danger" /></div><div class="mb-3"><label for="moviestarrating" class="form-label:">Movie Star Rating:</label><InputSelect id="moviestarrating" @bind-value="Movie.MovieStarRatingId" class="form-control"><option value="">-- Select --</option> @foreach (var movieStarRating in StarRatings) {<option value="@movieStarRating.Id">@movieStarRating.Descr</option> }</InputSelect><ValidationMessage For="() => Movie.MovieStarRating" class="text-danger"></ValidationMessage></div><button type="submit" class="btn btn-primary">Create</button></EditForm></div></div><div><a href="/movies">Back to List</a></div>@code { private BlazorWebAppMoviesContext context = default!; [SupplyParameterFromForm] private Movie Movie { get; set; } = new(); private IQueryable<MovieStarRating> StarRatings => context.MovieStarRating; // To protect from overposting attacks, see https://learn.microsoft.com/aspnet/core/blazor/forms/#mitigate-overposting-attacks. private async Task AddMovie() { using var context = DbFactory.CreateDbContext(); context.Movie.Add(Movie); await context.SaveChangesAsync(); NavigationManager.NavigateTo("/movies"); }}It's throwing an "object reference not set to instance of object" or something like that saying that my context object is null. Again, I'm quite new to this.