ASP.Net 5 MVC6 select taghelper produces wrong output

Question

I modified the default login of asp.net mvc 6 and wanted to add a dropdown-list with taghelper select but it seems like it produces a wrong output.

I added the select-taghelper-element so it looks like this:

<form asp-controller="Account" asp-action="Register" method="post" class="form-horizontal" role="form">
    <div class="form-group">
        <label asp-for="Tenant" class="col-md-2 control-label"></label>
        <div class="col-md-10">
            <select asp-for="Tenant" asp-items="ViewBag.Tenants" class="form-control" />
            <span asp-validation-for="Tenant" class="text-danger"></span>
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <button type="submit" class="btn btn-default">Register</button>
        </div>
    </div>
</form>

after adding the select-tag, the submit-button is not displayed anymore - the dropdown is displayed but contains no data, but using breakpoints Viewbag.Tenants contains data. When I remove the first div with the select-tag, the button is showing.

Any idea what here is wrong?

have you tried with an @ before ViewBag?

Joe Audette
– Joe Audette

2016-04-07 18:26:14 +00:00
Commented Apr 7, 2016 at 18:26 — Joe Audette
– Joe Audette, Commented Apr 7, 2016 at 18:26
@JoeAudette thanks, tried, makes no difference..

Matthias Burger
– Matthias Burger

2016-04-07 18:32:44 +00:00
Commented Apr 7, 2016 at 18:32 — Matthias Burger
– Matthias Burger, Commented Apr 7, 2016 at 18:32

Shyju · Accepted Answer · 2016-04-07 18:50:54Z

2

Your markup is wrong. Do not use the self closing select tag. Have an explicit closing tag.

This should work.

<select asp-for="Tenant" asp-items="ViewBag.Tenants" class="form-control"></select>

answered Apr 7, 2016 at 18:50

Shyju

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5 Comments

Matthias Burger Over a year ago

Ahh you're a genius! Thanks! :)

Mark Redman Over a year ago

I have tried this and weirdly I get the list rendered with multiple="multiple" as a select list rather than a dropdownlist?

Shyju Over a year ago

@MarkRedman It depends on the type of the property you use for asp-for If it is an array type (int[]/string[]), It will be rendered with multiple attribute

Mark Redman Over a year ago

Its a SelectList type, I have tried both SelectList and List<SelectListItem> (not IEnumerable or an array)

Shyju Over a year ago

I am talking about the property used for asp-for not asp-items. See Select Tag Helper in MVC 6

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