@page "/" @using System.ComponentModel.DataAnnotations; <PageTitle>@PageTitle</PageTitle> <h1>Hello, world!</h1> Welcome to your new app. <EditForm Model="ParentModel" OnValidSubmit="ValidFormSubmitted" OnInvalidSubmit="InvalidFormSubmitted"> <ObjectGraphDataAnnotationsValidator /> <ValidationSummary /> <div> <InputText @bind-Value="ParentModel.Name" /> <ValidationMessage For="@(() => ParentModel.Name)" /> </div> <div> <InputTextArea @bind-Value="ParentModel.Description" /> </div> <div> <AddressComponent ChildAddress="ParentModel.SimpleAddress" ChildSimpleString="@ParentModel.JustAString" /> </div> <input type="submit" class="btn btn-primary" value="Save Things" /> </EditForm> <div>@StatusMessage</div> @code { public class SimpleModel { [Required] public string? Name { get; set; } public string? Description { get; set; } [Required] public string? JustAString { get; set; } [ValidateComplexType] public Address? SimpleAddress { get; set; } = new Address(); } public class Address { public string? Street { get; set; } [Required] public string City { get; set; } = string.Empty; } [Parameter] public string? PageTitle { get; set; } = "IMA TITLE"; public SimpleModel ParentModel { get; set; } = new SimpleModel(); public string StatusMessage { get; set; } = "nothing has happened yet"; protected override async Task OnInitializedAsync() { await base.OnInitializedAsync(); ParentModel = new SimpleModel() { }; } private async Task ValidFormSubmitted(EditContext editContext) { StatusMessage = "yay"; } private async Task InvalidFormSubmitted(EditContext editContext) { StatusMessage = "boo"; } private async Task OnMyAddressThingChanged(Address addressThing) { StatusMessage = "address thing changed"; } }