Why does this @Html.Dropdownlistfor not accept htmlAttributes?

Question

I have a read-only view in some cases. I don’t want to use javascript as it can be disabled on the user side. At last...

When I do this (for testing) it works perfectly.

<div class="form-group">
@Html.LabelFor(model => model.IdStatusRegistro, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="input-group col-md-10">
    @Html.DropDownListFor(model => model.IdStatusRegistro, new SelectList(ViewBag.ListaSelectList, "Id", "Descricao"), new { @class = "form-control input-sm", @disabled ="disabled" })
    @Html.ValidationMessageFor(model => model.IdStatusRegistro, "", new { @class = "text-danger" })
</div>
</div>

But when I try to pass HTML attributes by variable, as follows, it doesn’t work:

var attribs = new Dictionary<string, object>();
attribs.Add("class", "form-control input-sm");
if (ViewBag.ReadOnly)
{
    attribs.Add("disabled", "disabled");
}
<div class="form-group">
@Html.LabelFor(model => model.IdStatusRegistro, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="input-group col-md-10">
    @Html.DropDownListFor(model => model.IdStatusRegistro, new SelectList(ViewBag.ListaSelectList, "Id", "Descricao"), new { htmlAttributes = @attribs })
    @Html.ValidationMessageFor(model => model.IdStatusRegistro, "", new { @class = "text-danger" })
</div>
</div>

Notice the only thing I change is:

@class = "form-control input-Sm", @disabled ="disabled"

for

htmlAttributes = @attribs

And what makes me curious is that it always worked for me. Even in the same View works perfectly for @Html.EditorFor. Only this Dropdownlistfor not receiving @attribs.

Answer 1

Try it this way:

@Html.DropDownListFor(model => model.IdStatusRegistro, new SelectList(ViewBag.ListaSelectList, "Id", "Descricao"), htmlAttributes: attribs)

Apparently it’s just an error in passing the parameter.