asp.net mvc 3 razor&html表

Question

我的UsersClass永远不会超过10个项目.我如何能够在这样的视图中显示用户类？

我想显示两行10个单元格

Answer 1

与往常一样,在每个ASP.NET MVC应用程序中,我建议使用适合视图要求的视图模型.因此,在此视图中,您提到了一个表,您希望将这些用户按行分组5个元素:

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

然后在控制器动作中:

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,强类型视图非常简单:

@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视图:

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

并在相应的显示模板中:

@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: