问为什么DisplayFormat DataFormatString不工作？

[Editable(false)]
[Display(Name = "Date")]
[DisplayFormat(DataFormatString = "{0:yyyy/MM/dd}", ApplyFormatInEditMode = true)]
public DateTime MovementDate { get; set; }

<td>
    @Html.DisplayFor(modelItem => item.MovementDate)
</td>

public class WithDateModel
{
    [DisplayFormat(DataFormatString = "{0:yyyy/MM/dd}")]
    public DateTime TheDate { get; set; }
    public WithDateModel()
    {
        TheDate = DateTime.Now;
    }
}

@model ParkPay.WebTests.Models.WithDateModel
@Html.DisplayFor(m => m.TheDate)
@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

2013/05/25 02:23:37 AM