How to convert to yyyy-MM-dd format for DateTime?

Question

I have a MVC action method which accept 2 date parameters. I tried to use .ToString but it gives me this error:

Returns the text representation of the value of the current Nullable object.

No overload for method 'ToString' takes 1 arguments.

I need to convert it to yyyy-MM-dd before pass it to the view. Otherwise, the textbox won't able to show the date value. Here is the code

public ActionResult Index(DateTime? dateFrom, DateTime? dateTo)
{            
    ViewBag.DateFrom = dateFrom.ToString("yyyy-MM-dd");

    return View();
}

`dateFrom` is nullable, you should use `dateFrom.Value.ToString("yyyy-MM-dd")` or `dateFrom?.ToString("yyyy-MM-dd")` — phuzi, Sep 11 '19 at 10:02
You will also have to answer the question "What date do you want to display in the view, if the nullable date is actually null?". — Matthew Watson, Sep 11 '19 at 10:03

score 2 · Accepted Answer · edited Sep 11 '19 at 10:10

2

You can use ToString like that with a normal DateTime. However you have nullable DateTime? and that won't work.

Try dateFrom.Value.ToString("yyyy-mm-dd")

Also be careful with mm (minutes) and MM (Months). I'm sure you need MM.

edited Sep 11 '19 at 10:10

Soner Gönül

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answered Sep 11 '19 at 09:58

TheFreaky

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score 0 · Answer 2 · edited Sep 11 '19 at 10:11

0

public ActionResult Index(DateTime? dateFrom, DateTime? dateTo)
{
    ViewBag.DateFrom = dateFrom?.ToString("yyyy-mm-dd");

    return View();
}

edited Sep 11 '19 at 10:11

Soner Gönül

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answered Sep 11 '19 at 10:00

MohammadReza OmidAllah

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2

Could you add an explanation of the code? – phuzi Sep 11 '19 at 10:05

How to convert to yyyy-MM-dd format for DateTime?

2 Answers2