ViewModel DisplayFormat Data Annotation not rendered in View

问题

Using ASP.NET 5 Web Application Template I am trying to render a date in short date format. My viewmodel looks like this

    [Display(Name = "Subscription Expires")]
    [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:d}")]
    public DateTime? SubscriptionExpires { get; set; }

My view looks like this

    <dt><label asp-for="SubscriptionExpires"></label>:</dt>
<dd>
    @Model.SubscriptionExpires
</dd>

However @Model.SubscriptionExpires renders in long date format. How do I get the view to render the date in short date format?

回答1:

You're directly outputting the date to the page, there is no opportunity for your data annotations to be considered.

HTML helpers look at those annotations, so you could simply do this:

@Html.DisplayFor(model => model.SubscriptionExpires)

Alternatively simply format the date like this:

@Model.SubscriptionExpires.ToShortDateString()

来源：https://stackoverflow.com/questions/34758911/viewmodel-displayformat-data-annotation-not-rendered-in-view