Trying to trigger postback on MVC dropdownlist in VB .net

Question

This is my code in SearchResults View for the colours dropdownlist

<td>@Html.DropDownList("colours", TryCast(ViewData("colours"), SelectList),
                       New With {.onchange = "document.getElementById('wineSearchCriteria').submit();"})</td>

I've set the form name to 'wineSearchCriteria'

<form action="/Wines/SearchResults" method="post" name="wineSearchCriteria"
    input type="submit" value="Search"/>

but the form is not posting back when the colours dropdown is changed. I'm sure this will be something simple!

Just as a bit of info. A [postback](http://stackoverflow.com/questions/183254/what-is-a-postback/183481#183481) is very much a Webforms concept. MVC is more tightly coupled to HTTP so it's either a [POST](http://en.wikipedia.org/wiki/POST_(HTTP)) or a [GET](http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods). — Liam, Oct 24 '13 at 16:28

score 1 · Answer 1 · answered Oct 24 '13 at 16:25

1

document.getElementById() will only retrieve elements by their ID, but you are not assigning an ID to the form. You are assigning a name to the form. Use the id attribute instead:

<form action="/Wines/SearchResults" method="post" id="wineSearchCriteria"
input type="submit" value="Search"/>

answered Oct 24 '13 at 16:25

Katie Kilian

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Thank you Charlie - as I said I knew it had to be something simple! Thanks for replying. – user2916577 Oct 25 '13 at 14:48

score 0 · Answer 2 · answered Oct 24 '13 at 16:26

0

You should set the id attribute as "wineSearchCriteria", not the name.

<form action="/Wines/SearchResults" method="post" id="wineSearchCriteria" />

answered Oct 24 '13 at 16:26

WannaCSharp

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Trying to trigger postback on MVC dropdownlist in VB .net

2 Answers2