繁体   English   中英

创建多个表/网格

[英]Create multiple tables/grids

我刚开始根据此first-mvc-app教程学习ASP.NET Core MVC

我有一个数据库表“ tblProducts”,我可以使用创建一个列出所有产品的表

型号

public class tblProducts
{
    //SQL table is named tblProducts

    [Key]
    public int ID { get; set; }
    public DateTime Date { get; set; }
    public string Field1 { get; set; }
    public string Field2 { get; set; }
    public string Product { get; set; } //<<Want separate tables split by this field
}

查看

@model IEnumerable<LearnMVC.Models.tblProducts>

@{
    ViewData["Title"] = "Index";
}

<h2>Index</h2>

<p>
    <a asp-action="Create">Create New</a>
</p>
<table class="table">
    <thead>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Date)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Field1)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Field2)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Product)
            </th>
            <th></th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Date)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Field1)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Field2)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Product)
                </td>
                <td>
                    <a asp-action="Edit" asp-route-id="@item.ID">Edit</a> |
                    <a asp-action="Details" asp-route-id="@item.ID">Details</a> |
                    <a asp-action="Delete" asp-route-id="@item.ID">Delete</a>
                </td>
            </tr>
        }
    </tbody>
</table>

Contoller :使用实体框架的带有视图的默认MVC控制器

public class tblProductsController : Controller
{
    private readonly ApplicationDbContext _context;

    public tblProductsController(ApplicationDbContext context)
    {
        _context = context;    
    }

    // GET: tblProducts
    public async Task<IActionResult> Index()
    {
        return View(await _context.tblProducts.ToListAsync());
    }

    // GET: tblProducts/Details/5
    public async Task<IActionResult> Details(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var tblProducts = await _context.tblProducts.SingleOrDefaultAsync(m => m.ID == id);
        if (tblProducts == null)
        {
            return NotFound();
        }

        return View(tblProducts);
    }

    // GET: tblProducts/Create
    public IActionResult Create()
    {
        return View();
    }

    // POST: tblProducts/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Create([Bind("ID,Date,Field1,Field2,Product")] tblProducts tblProducts)
    {
        if (ModelState.IsValid)
        {
            _context.Add(tblProducts);
            await _context.SaveChangesAsync();
            return RedirectToAction("Index");
        }
        return View(tblProducts);
    }

    // GET: tblProducts/Edit/5
    public async Task<IActionResult> Edit(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var tblProducts = await _context.tblProducts.SingleOrDefaultAsync(m => m.ID == id);
        if (tblProducts == null)
        {
            return NotFound();
        }
        return View(tblProducts);
    }

    // POST: tblProducts/Edit/5
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Edit(int id, [Bind("ID,Date,Field1,Field2,Product")] tblProducts tblProducts)
    {
        if (id != tblProducts.ID)
        {
            return NotFound();
        }

        if (ModelState.IsValid)
        {
            try
            {
                _context.Update(tblProducts);
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!tblProductsExists(tblProducts.ID))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }
            return RedirectToAction("Index");
        }
        return View(tblProducts);
    }

    // GET: tblProducts/Delete/5
    public async Task<IActionResult> Delete(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var tblProducts = await _context.tblProducts.SingleOrDefaultAsync(m => m.ID == id);
        if (tblProducts == null)
        {
            return NotFound();
        }

        return View(tblProducts);
    }

    // POST: tblProducts/Delete/5
    [HttpPost, ActionName("Delete")]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> DeleteConfirmed(int id)
    {
        var tblProducts = await _context.tblProducts.SingleOrDefaultAsync(m => m.ID == id);
        _context.tblProducts.Remove(tblProducts);
        await _context.SaveChangesAsync();
        return RedirectToAction("Index");
    }

    private bool tblProductsExists(int id)
    {
        return _context.tblProducts.Any(e => e.ID == id);
    }
}

Data \\ ApplicationDbContext.cs

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);
    }

    public DbSet<tblProducts> tblProducts { get; set; }
}

请有人帮忙解释一下(或知道任何好的教程)如何根据相同的模型字段创建多个表,但每个表都由“产品”列拆分吗?

假设有5种产品,我希望看到5个表都具有相同的字段Date,Field1,Field2和Product,但是Product对于每个表都是唯一的。

我不会预先知道有多少种产品,因此需要一些逻辑来确定需要多少张表。 由于这是我的新手,因此我不确定是否需要多个模型,或者是否可以在控制器或视图中完成某些巧妙的操作,因为数据全部来自同一张表。

我尝试了一些搜索,但它们似乎不是非mvc或基于多个不同的模型(例如,这很相似,但每个表的数据源不同http://www.compilemode.com/2016/09/show-在asp-net-mvc.html中查看多个表数据

TL; DR :ASP.NET MVC显示从单个数据库表中按字段划分的多个表的方式是什么?

更新了小提琴,以更好地反映您对不知道需要多少张桌子的要求-抱歉,第一次错过了。 和以前一样,小提琴不会运行,但是应该可以让您很好地了解如何使用它。

就个人而言,我不希望视图中具有这种逻辑,当然可以将其移回控制器,但可以将其视为概念的证明。

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM