ASP.Net MVC DisplayFormat

Question

In my model, I have the following DataAnnotations on one of my properties

[Required(ErrorMessage = "*")] [DisplayFormat(DataFormatString = "{0:d}")] [DataType(DataType.Date)] public DateTime Birthdate { get; set; } 

The required annotation works fine, I added another 2 to try to remove the time. It binds to the input in the view using

 <%=Html.TextBoxFor(m => m.Birthdate, new { @class = "middle-input" })%> 

However, whenever the view loads, I still get the time that appears in the input field. Is there a way to remove this using DataAnnotations?

Answer 1

The [DisplayFormat] attribute is used only in EditorFor / DisplayFor, and not in raw HTML APIs such as TextBoxFor.

Answer 2

Since Brad said that it does not work for TextBoxFor, but you will also need to remember adding the ApplyFormatInEditMode method if you want it to work for EditorFor.

 [DataType(DataType.Date), DisplayFormat( DataFormatString="{0:dd/MM/yy}", ApplyFormatInEditMode=true )] public System.DateTime DateCreated { get; set; } 

Then use

 @Html.EditorFor(model => model.DateCreated) 

Answer 3

My problem was to set some html attributes (jquery-datepicker), so EditorFor was not an option for me.

Implementing a special helper method solves my problem:

ModelClass with DateTime-Property:

 [DataType(DataType.Date)] [DisplayFormat(DataFormatString = "{0:dd.MM.yyyy}", ApplyFormatInEditMode = true)] public DateTime CustomDate{ get; set; } 

View with ModelClass as a model:

 @Html.TextBoxWithFormatFor(m => m.CustomDate, new Dictionary<string, object> { { "class", "datepicker" } }) 

Helper method in a static helper class:

 public static class HtmlHelperExtension { public static MvcHtmlString TextBoxWithFormatFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IDictionary<string, object> htmlAttributes) { ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData); return htmlHelper.TextBox(htmlHelper.ViewData.TemplateInfo.GetFullHtmlFieldName(metadata.PropertyName), string.Format(metadata.DisplayFormatString, metadata.Model), htmlAttributes); } }