Nullable Datetime in .NET CORE MVC

Question

I have a view which is used for "Create" and "Update" a database model. The database model has a property which is a DateTime? (nullable). Now I am trying to use this nullable datetime in an ASP.NET Core MVC view which looks like the following:

@Html.TextBoxFor(model => model.MyNullableDate,"{0:dd.MM.yyyy}", new { placeholder = "dd.MM.yyyy", @class = "form-control form-control-sm", type = "date" })

This works very well for the "Create" process. If a date is set, it is written correctly into the database. But now I want to update the already existing database value model.MyNullableDate.

I read the value from the database and pass the value again to the view. The property MyNullableDate is set correctly and I saw in the debugger that the correct date is written into it.

But in the view, nothing is shown... it's only an empty textbox without the passed in value of MyNullableDate.

The property looks like this:

    [DisplayFormat(DataFormatString = "{0:dd.MM.yyyy}")]
    [DataType(DataType.Date)]
    public DateTime? MyNullableDate{ get; set; }

What am I doing wrong? How can I show the value of MyNullableDate in the TextBoxFor?

Why is the placeholder format (mm/dd/yyyy) different from the one used in DataFormatString (dd.MM.yyyy)? Also, you've probably meant MM instead of mm — kasptom
– kasptom, Commented Mar 14, 2020 at 10:18

davmos · Accepted Answer · 2020-03-14 15:52:15Z

2

This is related to the date format rather than the nullability.

See https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date

The displayed date format will differ from the actual value — the displayed date is formatted based on the locale of the user's browser, but the parsed value is always formatted yyyy-mm-dd.

When I passed the format as below, the date displayed :)

@Html.TextBoxFor(
    expression: model => model.MyNullableDate, 
    format: "{0:yyyy-MM-dd}", 
    htmlAttributes: new
    {
        placeholder = "dd.MM.yyyy", 
        @class = "form-control form-control-sm", 
        type = "date"
    })

answered Mar 14, 2020 at 15:52

davmos

9,6074 gold badges45 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Nullable Datetime in .NET CORE MVC

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related