The specified value does not conform to the required format yyyy-MM-dd

问题:

I have a .Net MVC 5 application that is using Data Annotations, Entity-Framework Jquery 2.1.3 and Jquery UI 1.11.4.

When I render an edit form with an input of type date using the UK format "dd/MM/YYYY"; the following error message appears when using Google Chrome:

The specified value '10/10/2001' does not conform to the required format, 'yyyy-MM-dd'. jquery-2.1.3.js:5317

Model

public class MyModel {     [Column(TypeName = "date"), DataType(DataType.Date), Display(Name = "My date")]     [DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}")]     public string MyDate { get; set; } } 

Mark up

The value is set correctly in the input control but the date does not appear in the browser. I first thought this was an issue with jQuery as it is appearing the jQuery script file, but when testing in IE and Firefox everything is working fine.

I then assumed it was my regional setting in chrome as by default Chrome thinks everyone English is in America, I changed the regional setting to UK and still the same issue appears.

A simple fix would be to change the format in my model to universal but to UK users this is a little alien.

Is there a way to tell chrome that accept date formats in "dd/MM/YYYY"?

回答1:

The specifications for the HTML5 date picker state that the date must be in the format yyyy-MM-dd (ISO format). This means that you DisplayFormatAttribute must be

[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)] public string MyDate { get; set; } 

Alternatively you can manually add the format using

@Html.TextBoxFor(m => m.MyDate, "{0:yyyy-MM-dd}", new { @type = "date"  }) 

The later option allows you to keep the DataFormatString = "{0:dd/MM/yyyy}") for usage in @Html.DisplayFor()

回答2:

You can use the InputTagHelper.Format

https://docs.asp.net/projects/api/en/latest/autoapi/Microsoft/AspNetCore/Mvc/TagHelpers/InputTagHelper/#prop-Microsoft.AspNetCore.Mvc.TagHelpers.InputTagHelper.Format

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