Develop Reference

How to set value of default date in DateTime EditorFor

I have tried different approach to make a dateTime text box, this is the one that works, but the problem is I cannot set a default date.
Here's what I am working on:
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy/MM/dd}", ApplyFormatInEditMode = true)]
Then I set the date today, DateTime.Now like this model.NotifyDate = DateTime.Now;
It doesn't set the date. However, if I remove [DataType(DataType.Date)] from the model I will get:
I will get the date, but the calendar is gone. What's the problem? Or am I using the datepicker wrong?
Here's my view:
#Html.EditorFor(m => m.NotifyDate, new { htmlAttributes = new { #class = "form-control input-sm" } })

You were on the right track! Defaults such as this should be set in the ViewModel
(as it appears you're doing w/ model.NotifyDate = DateTime.Now;)
The problem here appears to be that the browser is expecting the value for the generated html input element to be formatted differently -- namely, yyyy-MM-dd vs yyyy/MM/dd.
(note the use of - vs /)
In order for the browser to correctly display the date, the value must be formatted as 2019-09-23.
ex:
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
Here is a great answer to a similar question that should shed some more light on what's going on as well.

You should try this datepicker in js.
$('.date').datepicker({
format: "dd.mm.yyyy",
weekStart: 1,
clearBtn: true,
todayBtn: "linked",
language: "tr",
startDate: new Date(),
autoclose: true
});

Since Browser is expecting the value for the generated HTML input, you either need to provide value with client-side javascript (or client-side datepicker) or bind the value to model.
You can bind the value to model and pass to view from the controller as follows.
public async Task<ActionResult> Create()
{
var dateInfo = new DateInfo()
{
StartDate = DateTime.Now
};
return View(dateInfo);
}
Or you can assign value from client side. jQuery UI is simple and easy to implement. You can Visit .

Format date within View in ASP.NET Core MVC

I have problem in regarding with converting the datetime to date using a model.
Model from Class Library
public partial class LoanContract
{
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime LoanDateStart { get; set; }
}
Model from Project
public class ModelLoan
{
public LoanContract loanContract { get; set; }
}
Code in controller
myList.loanContract = new LoanContract { LoanDateStart = DateTime.Today };
View:
<input disabled type="date" asp-for="loanContract.LoanDateStart" id="dpDateNow" class="form-control" />
It show like this: yyyy-MM-dd what I want to achieve is that I want to change it to MM/dd/yyyy. I tried using .ToString("MM/dd/yyyy") but it doesn't work.

Thank you #Enrico for your comment i add it in the answer :
Try it with this in your model:
[DataType(DataType.Date)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]
And In your controller change DateTime to Date :
myList.loanContract = new LoanContract { LoanDateStart = Date.Today };
Hope this help you.

Simple and practical, use asp-format, example:
<input asp-for="MyDate" asp-format="{0:dd/MM/yyyy}" class="form-control" />
Or:
#Html.TextBoxFor(model => model.MyDate, "{0:dd/MM/yyyy}", new { #class = "form-control" })

If when defining in model does not work, you can use inside your view file:
#String.Format("{0:dd/MM/yyyy}",ViewBag.TerminoDaAvaliacao)
This ViewBag contains a DateTime value. The time disapears with this format definition. It is not necessary to change DateTime by Date inside the Model file definition.

I have also solved this problem using .ToString("d"). I received output of "MM/DD/YYYY".

This might be the wrong solution to the problem being asked, but I hope it helps someone. If you are trying to input only a date (without time) Model.IsValid will throw back a validation error saying the date input format is incorrect. To solve this problem, simply Add this to your model.
[Display(Name = "Date")]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
[DataType(DataType.Date)]
public DateTime Date { get; set; }
Using data attributes inside asp.net have the benefit of automatically being supported by jQuery client-side validation. (Generated by Asp.Net)

I think it is a bug for dateformat escape chars on dotnet core. None of above solutions worked for me. Only this method solved my problem. why does DateTime.ToString("dd/MM/yyyy") give me dd-MM-yyyy?
[DisplayFormat(DataFormatString = "{0:dd'/'MM'/'yyyy}", ApplyFormatInEditMode = true)]
or
<input asp-for="DateProperty" asp-format="{0:dd'/'MM'/'yyyy}">

Add [DataType(DataType.Date)] in your model
[Column(TypeName = "Date")]
[DisplayName("Date of birth")]
[DataType(DataType.Date)]

(Current as of ASP.NET 6)
The problem with almost all of these answers (except the one from #Alex_Jung_89) is that they don't respect the current culture of the thread. If you operate in different locales, the custom string that you're using will not be correct if, for example, your user is hitting you from a browser that's fr-FR, because they reverse month and day from the US standard.
Tag helpers work best here without all of the annotation stuff junking up your models, and coming back in the pipe the model binder will work on the current culture of the thread.
<input type="text" asp-for="Dob" asp-format="{0:d}" />
It's also best to defer formatting to the view to keep a clear separation of concerns.
Standard format strings:
https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings

For those who get here wanting to change date format of a model in the view regardless of Model class (Its what I expected to be answering). This works in both Razorpages and MVC.
Just add .ToString("dd/MM/YYYY") to the property you're displaying.
e.g.
#Model.DateOfBirth.ToString("<Use formatting here>")
This is great if you only want to show part of a date say month and year, but elsewhere you need to show the day and the time.

This might be extremely helpful sometimes,
<input asp-for="DateProperty" asp-format="**#Model.DateProperty.ToString($"{0:dd/MM/yyyy}")**">

Binding lost on #Html.EditorFor when I apply formatting

When using the following I lose the binding on the field
#Html.EditorFor(model => model.Quote.DiscountRate, new { #class = "form-control pull-left " })
And the model field looks like this:
[DisplayFormat(DataFormatString = "{0:P2}",ApplyFormatInEditMode =true)]
public double? DiscountRate { get; set; }
if I remove the DisplayFormat the binding still works.
I also tried the following with the same result:
#Html.TextBoxFor(model => model.Entity.DiscountRate, "{0:P2}", new { #class = "form-control pull-left" })
In both cases if I remove the formatting I get my binding back

What I have discovered is that when you apply a DisplayFormat, it is as the name suggests, for display. If you want to display a decimal value with formatting and make it available for editing, you have to handle the conversion from text back to decimal at post time -- or whenever you need the actual value.

MVC storing date without time

I am trying to save the date the user enters into a database. The problem is that despite only the date showing in the text box the time is also being saved. This is what it looks like in my model.
{11/02/2015 00:00:00}
However this is what I have in my JQuery set up and how I would like it to look when saved to the database, without the time also attached.
$("#datepicker").datepicker({ dateFormat: 'dd/mm/yy' });
I assume the problem lies in my model somewhere so this is how I have it set up at the moment.
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy}")]
public DateTime DateOfBooking { get; set; }
and this is my view,
<div class="form-group">
#Html.LabelFor(model => model.DateOfBooking, new { #class = "control-label col-md-2"})
<div class="col-md-10">
#Html.TextBoxFor(x => x.DateOfBooking, new { #id = "datepicker" })
#Html.ValidationMessageFor(model => model.DateOfBooking)
</div>
</div>

There's no way, using DateTimes, to only store/pass the date to the model. In SQL you can use a Date data type that will only store the Date part of the DateTime object from .Net. However, when you move data into/out of your model you'll always have a time component. The easiest way is to just ignore the time component and specify the display format like you're doing.
You could also use something like Noda Time that has structs for Date only types.

Disabled DateTime field is marked as required in MVC4 page

One of my models contains a property which looks like this
private Nullable<DateTime> myDate;
[Display(Name = "My Date")]
[Editable(false)]
// [DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy HH:mm}", ApplyFormatInEditMode = true)]
public DateTime MyDate
{
get { return this.myDate?? new DateTime(1, 1, 1); }
set { this.myDate = value; }
}
// [DataType(DataType.Date)] is commented out because it's a leftover from some experiments I made.
In my "edit" view I render the property like this
// input.noborder { border: 0 none; }
#Html.EditorFor(model => model.MyDate, new { #readonly = true, #class = "noborder" })
#Html.ValidationMessageFor(model => model.InvoiceDate)
I did not create an EditorTemplate for DateTime type. Finally, in the scripts of the same view, I attach jQuery Datepicker
var $dpMyDate = $('[name=MyDate]');
$dpMyDate.datepicker();
I basically want to render a read-only datepicker (next step would be to implement more scripts which would enable it if some conditions are met).
Everything seems to work but upon clicking the "save" button, validation tells me that the field is required, but I expected it not to be, since I didn't put the [Required] attribute in the class. Also (but this might just be me assuming too much) it feels weird that a readonly input field would be required (how is one supposed to fill it?)
I don't see anything wrong with the code, am I missing something ?

From reading the comments it looks like you failed at the javascript validation that ASP.NET MVC adds. The issue is that, while your private field is nullable, the property is non-nullable (DateTime is a struct). ASP.NET MVC binds to the property and concludes that it is "Required" even though it's not marked as [Required].
As a result, ASP.NET MVC will generate javascript as if it were marked as a [Required] property. In particular, you used an EditorFor() and so the javascript ASP.NET MVC injects will treat it as required. Since it's a readonly form element I believe the javascript will complain.
The way to get around this is to use a DisplayFor() which doesn't have that javascript attached.
Note that if you have a nullable property that is [Required] but you don't want it to be editable, you'll actually need to do something extra in addition to using DisplayFor()--you'll need to submit something in the HTTP request that ASP.NET MVC knows how to model bind. The most popular option is an <input> element with type=hidden. Because the user has absolute control over the HTTP request he sends to the server, you would probably want to ignore the submitted value to prevent "overposting".

Try this,
Change this
#Html.EditorFor(model => model.MyDate, new { #readonly = true, #class = "noborder" })
to
#Html.TextBoxFor(model => model.MyDate, new { #readonly = true, #class = "noborder" })
And remove #Html.ValidationMessageFor(model => model.InvoiceDate) it's no need.

I think its because your date not Nullable.
Try to define it like
public DateTime? MyDate