AddTalkEntryDialog.razor

@using LinkDotNet.Blog.Domain
<ModalDialog @ref="Dialog" Title="Add Talk">
    <EditForm Model="model" OnValidSubmit="CreateTalk">
        <DataAnnotationsValidator />
        <ValidationSummary />

        <div class="mb-3">
	        <label for="talk-title" class="form-label">Presentation title</label>
	        <InputText class="form-control" id="talk-title" @bind-Value="model.PresentationTitle" />
        </div>
        <div class="mb-3">
	        <label for="talk-place" class="form-label">Presentation place</label>
	        <InputText class="form-control" id="talk-place" @bind-Value="model.Place" />
	        <small class="form-text text-secondary">
		        The place / event where you held the presentation / talk.
	        </small>
        </div>
        <div class="mb-3">
	        <label for="talk-date" class="form-label">Date</label>
	        <InputDate class="form-control" id="talk-date" @bind-Value="model.PublishedDate" />
        </div>
        <div class="mb-3">
	        <label for="talk-content" class="form-label">Description</label>
	        <MarkdownTextArea id="talk-content" class="form-control" rows="10"
	                          @bind-Value="@model.Description"></MarkdownTextArea>
        </div>

        <button id="talk-submit" class="btn btn-primary" type="submit">Submit</button>
    </EditForm>
</ModalDialog>

@code {

    [Parameter]
    public EventCallback<Talk> TalkCreated { get; set; }

    private ModalDialog Dialog { get; set; } = default!;

    private AddTalkEntryModel model = new();

    public void Open()
    {
        Dialog.Open();
        StateHasChanged();
    }

    private async Task CreateTalk()
    {
	    ArgumentNullException.ThrowIfNull(model.PresentationTitle);
	    ArgumentNullException.ThrowIfNull(model.Place);
	    ArgumentNullException.ThrowIfNull(model.Description);

        var talk = Talk.Create(model.PresentationTitle, model.Place, model.Description, model.PublishedDate);
        await TalkCreated.InvokeAsync(talk);
        model = new AddTalkEntryModel();
        Dialog.Close();
    }
}