CODEWITHSUNDEEP
asp.net-mvc-2html-helperhtml.dropdownlistfor
Cipiripi
Cipiripi

Reputation: 1143

MVC- receive selected Dropdownlist value in [HttpPost] method on change event

Hey.. How to receive selected Dropdownlist value in [HttpPost] method on change event? I always receive it in [HttpGet] method.

<%: Html.DropDownListFor(model => model.TipTpa, ViewData[ArtikliKonstante.vdListaTipovaTPa] as IEnumerable<SelectListItem>, 
                new { onchange = "location.href='/Artikli/PromjenaTipa? p='+this.value"})%>

If I declare my method as [HttpPost] I get error, that action doesn't exist. Any idea? Thx

Upvotes: 1

Views: 1836

Answers (1)

Darin Dimitrov
Darin Dimitrov

Reputation: 1039498

You need to POST if you want the proper action to be invoked. In your case you are simply redirecting (window.location.href) which sends a GET request.

So you could place the dropdown inside a form and use javascript to submit the form when the selection changes:

<% using (Html.BeginForm("PromjenaTipa", "Artikli", FormMethod.Post, new { id = "myform" })) { %>
    <%: Html.DropDownListFor(
        model => model.TipTpa, 
        ViewData[ArtikliKonstante.vdListaTipovaTPa] as IEnumerable<SelectListItem>, 
        new { id = "tipTpa" }
    ) %>
<% } %>

and then subscribe for the change event in javascript (example with jquery):

$(function() {
    $('tipTpa').change(function() {
        $('#myform').submit();
    });
});

This will POST the form to the PromjenaTipa action where you could read the selected value:

[HttpPost]
public ActionResult PromjenaTipa(string tipTpa)
{
    // tipTpa should contain the selected value
    ...
}

Another possibility would be to send an AJAX query in the change event. In this case you don't need a form as you could send POST request with AJAX.

Upvotes: 3

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