bulletboards/ImageBoardServerApp/Pages/Basic/ThreadPage.razor

@page "/{boardName}/thread/{threadId}"
@using System.ComponentModel.DataAnnotations
@using ImageBoardServerApp.Data.Repository
@inject NavigationManager NavigationManager

<PageTitle>Thread #@post.GET on /@boardName/ - BulletBoard</PageTitle>

<h3>Thread #@post.GET on /@boardName/</h3>
<Post post="@post" showOpenThread="false"/>
<hr/>

@foreach (var comment in post.Comments)
{
    <Comment comment="comment"/>
    <hr/>
}
<div class="Form">
    <CommentForm post="post"/>
</div>

@code {

    [Parameter]
    [Required]
    public string boardName { get; set; }

    [Parameter]
    [Required]
    public string threadId { get; set; }

    private PostData post;

    protected override async Task OnInitializedAsync()
    {
        if (!int.TryParse(threadId, out _))
            NavigationManager.NavigateTo("/notfound");
        post = await PostsRepository.getPostByIdAsync(int.Parse(threadId));

        if (post == null)
            NavigationManager.NavigateTo("/notfound");

        if (post.Board != boardName)
            NavigationManager.NavigateTo("/notfound");
        if (post == null)
            NavigationManager.NavigateTo("/notfound");
    }

}