C#MVC Datetime changing format error

Question

when i want to change my datetime format i take error.I use this code on view:

@Html.TextBoxFor(model => model.enddate, new { @Value =((DateTime)Model.enddate).ToString(" dd/MM/yyyy"),@class = "input-xlarge datepicker"})

but when i execute Model.enddate is null so i take this error:

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Can you help me.

My english is not very well :(

[What is a `NullReferenceException` and how do I fix it?](http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Soner Gönül, Mar 12 '15 at 10:59

MarkP · Answer 1 · 2015-03-12T11:26:05.110

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If the model.enddate is legitimately null you could set the datatype to nullable in the model - DateTime? enddate

And you could add the DisplayFormat Attribute to the property

[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
 public DateTime? enddate{ get; set; }

edited Mar 12 '15 at 11:26

answered Mar 12 '15 at 10:58

MarkP

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where i should write this? – Veysel Solak Mar 12 '15 at 11:24
you should add the attribute above the fields in you Model class containing the enddate property – MarkP Mar 12 '15 at 11:26

score 0 · Answer 2 · answered Mar 12 '15 at 10:47

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Check that from you controller you send an instance of the model with data, it seems that property enddate is null.

answered Mar 12 '15 at 10:47

U. Busto

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Its true enddate is null i said this but it should null because i take enddate's value on view. – Veysel Solak Mar 12 '15 at 10:48
so you when you try `enddate.ToString` - you get this error, don't do that that :-) – Grundy Mar 12 '15 at 10:49
and yoy pass the instance of the object to the view like return View(model); – U. Busto Mar 12 '15 at 10:49

score 0 · Answer 3 · answered Mar 12 '15 at 10:55

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You date seems to be nullable, format it only when a value is provided :

@Html.TextBoxFor(model => model.enddate, new { @Value =(Model.enddate.HasValue ? Model.enddate.Value.ToString(" dd/MM/yyyy") : ""),@class = "input-xlarge datepicker"})

answered Mar 12 '15 at 10:55

Guillaume

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it still take same error.Object reference not set an instance of an object – Veysel Solak Mar 12 '15 at 11:04
Then maybe Model it self is null. I think MarkP is right, use DisplayFormatAttribute. – Guillaume Mar 12 '15 at 13:16

C#MVC Datetime changing format error

3 Answers3