ASP.NET MVC Dropdown list on change to cause postback without Javascript

Question

Is it possible to cause a postback to an action from changing your selection in a dropdown list without using JavaScript?

I remember when using the ASP.NET Forms dropdown list control, there was a property that when set would cause a postback on change, did this work without JS? - If so, how?

Many thanks, Kohan.

Scott · Accepted Answer · 2010-12-22 15:51:45Z

6

You can achieve the postback effect using jQuery. JavaScript in some form or another is required for automatic postbacks. Even ASP.NET uses JavaScript in the background to implement the AutoPostBack property.

<script type='text/javascript'\> 
  $('#dropDown').change(function () {
    $(this).parents('form').submit();
  });
</script>

answered Dec 22, 2010 at 15:51

Scott

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kemiller2002 · Accepted Answer · 2010-12-22 15:46:29Z

4

You need JavaScript to automatically post back data. You don't have to write it, but you still need it. You can post without JavaScript (someone pressing a submit button), but not automatically.

I believe what you are thinking of is the AutoPostBack property.

answered Dec 22, 2010 at 15:46

kemiller2002

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4 Comments

4imble Over a year ago

RE: AutoPostBack, Yes i was, does it not work with Javascript disabled?

4imble Over a year ago

Silly question, What i meant to say is what does it do with javascript disabled. Fail silently?

kemiller2002 Over a year ago

Yes, that it does do. Now this does partially depend on the page. If you have no way to submit it without the autopostback from firing then the page is pretty much useless, but asp.net does gracefully degrade.

jimplode Over a year ago

Also, you add a button in a <noscript> tag so that the users without javascript can make the form post. People with javascript can then use it as it was intended

Community · Accepted Answer · 2017-05-23 11:58:51Z

1

Do this:

More here:

How do you submit a dropdownlist in asp.net mvc

edited May 23, 2017 at 11:58

CommunityBot

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answered Dec 22, 2010 at 15:47

Leniel Maccaferri

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Comments

Mandeep Janjua · Accepted Answer · 2012-10-09 18:21:52Z

1

Complete script which worked for me

 @Html.DropDownList("Projects", Model.Projects, new { 
 style = "Height: 25px; width: 225px;", 
 onchange = "$(this).parents('form').submit();" })

answered Oct 9, 2012 at 18:21

Mandeep Janjua

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