学习ASP.NET Core Razor 编程系列十五——文件上传功能（三）

@page "{id:int}"
@model RazorMvcBooks.Pages.Descri.DeleteModel
@{
    ViewData["Title"] = "删除上传文件";
}

<h2>删除上传文件</h2>
<h3>你是否确认要删除此文件?</h3>
<div>
    <h4>上传文件</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            @Html.DisplayNameFor(model => model.Describe.Name)

        </dt>
        <dd>
            @Html.DisplayFor(model => model.Describe.Name)

        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Describe.PublicScheduleSize)

        </dt>
        <dd>
            @Html.DisplayFor(model => model.Describe.PublicScheduleSize)

        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Describe.PrivateScheduleSize)

        </dt>
        <dd>
            @Html.DisplayFor(model => model.Describe.PrivateScheduleSize)

        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Describe.UploadDateTime)

        </dt>
        <dd>
            @Html.DisplayFor(model => model.Describe.UploadDateTime)

        </dd>
    </dl>

    <form method="post">
        <input type="hidden" asp-for="Describe.ID" />
        <input type="submit" value="Delete" class="btn btn-default" /> |
        <a asp-page="./Index">Back to List</a>
    </form>
</div>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using RazorMvcBooks.Models;
using Microsoft.EntityFrameworkCore; 

namespace RazorMvcBooks.Pages.Descri
{
    public class DeleteModel : PageModel
    { 

        private readonly RazorMvcBooks.Models.BookContext _context;
 
        public DeleteModel(RazorMvcBooks.Models.BookContext context)

        {
            _context = context;
        }


        [BindProperty]
        public Describe Describe { get; set; }

        public async Task<IActionResult> OnGetAsync(int? id)
        {
            if (id == null)
            {
                return NotFound();

            } 

            Describe = await _context.Describe.SingleOrDefaultAsync(m => m.ID == id); 

            if (Describe == null)
            {
                return NotFound();

            }
            return Page();
        } 

// OnPostAsync 方法按 id 处理计划删除：
        public async Task<IActionResult> OnPostAsync(int? id)
        {
            if (id == null)
            {
                return NotFound();
            }
            Describe = await _context.Describe.FindAsync(id); 

            if (Describe != null)
            {
                _context.Describe.Remove(Describe);

                await _context.SaveChangesAsync();

            } 
            return RedirectToPage("./Index");
        }

    }
}