canvasManagement/Management.Web/Pages/Course/Module/Modules.razor

@using Management.Web.Pages.Course.Module
@using System.Linq
@using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage

@inject CoursePlanner planner

@code {
  private bool showNewModule { get; set; } = false;
  protected override void OnInitialized()
  {
    planner.StateHasChanged += reload;
  }
  private void reload()
  {
    this.InvokeAsync(this.StateHasChanged);
  }
  public void Dispose()
  {
    planner.StateHasChanged -= reload;
  }
}

<div class="row justify-content-end mb-1">
  <div class="col-auto">
    @if (!showNewModule)
    {
      <button class="btn btn-outline-secondary" @onclick="() => showNewModule = true">New Module</button>
    }
    else
    {
      <button class="btn btn-outline-secondary" @onclick="() => showNewModule = false">Hide New Module</button>
    }
  </div>
</div>

@if (showNewModule)
{
  <NewModule OnSubmit="() => showNewModule = false" />
}

@if (planner.LocalCourse != null)
{
  <div class="accordion" id="modulesAccordion">

  @foreach (var module in planner.LocalCourse.Modules)
  {
    <ModuleDetail Module="module" />
  }
  </div>
}