c# - asp.net mvc 3 Razor 和 html 表

Question

我有 UsersClass，它永远不会超过 10 个元素。我如何在类似这样的 View 中显示带有表的用户类？

我想显示包含 10 个单元格的两行

Answer 1

一如既往，在每个 ASP.NET MVC 应用程序中，我都建议使用适合 View 要求的 View 模型。因此，在此 View 中，您提到了一个表，您希望在其中按每行 5 个元素对这些用户进行分组:

public class MyViewModel
{
    public int Key { get; set; }
    public IEnumerable<UsersClass> Users { get; set; }
}

然后在 Controller Action 中:

public ActionResult Index()
{
    // that's your domain model => a list of UsersClass
    // could be coming from wherever you want
    var users = Enumerable.Range(1, 7).Select(x => new UsersClass
    {
        Id = x
    });

    // Now let's group those users into the view model:
    // We will have 5 elements per row
    var model = users
        .Select((u, index) => new { User = u, Index = index })
        .GroupBy(x => x.Index / 5)
        .Select(x => new MyViewModel
        {
            Key = x.Key,
            Users = x.Select(y => y.User)
        });
    return View(model);
}

最后，强类型 View 非常简单:

@model IEnumerable<MyViewModel>
<table>
    @foreach (var item in Model)
    {
        <tr>
            @foreach (var user in item.Users)
            {
                <td>@user.Id</td>
            }

            <!-- That's just to fill the row with the remaining
                 td if we have less than 5 users. Obviously
                 depending on your requirements you could use
                 a single td with a calculated colspan or something else
            -->
            @for (int i = item.Users.Count(); i < 5; i++)
            {
                <td></td>
            }
        </tr>
    }
</table>

显然，使用显示模板可以进一步简化此 View :

@model IEnumerable<MyViewModel>
<table>
    @Html.DisplayForModel()
</table>

并在相应的展示模板中:

@model MyViewModel
<tr>
    @Html.DisplayFor(x => x.Users)
    @for (int i = item.Users.Count(); i < 5; i++)
    {
        <td></td>
    }
</tr>

和 UsersClass 显示模板:

@model UsersClass
<td>@user.Id</td>

结果: