Populate Dropdown menu using JSON data

-- Controller --

[WebMethod]
public ActionResult GetSellers()
{
    List<Seller> sellers = db.Sellers.ToList();

    return Json(sellers, JsonRequestBehavior.AllowGet);
}

-- View --

@Html.DropDownListFor(x => x.SellerId, new SelectList(Enumerable.Empty<SelectListItem>()))

-- Javascript --

<script type="text/javascript">
    $('#DeptId').change(function () { // DeptId is my another DropDownList
        $.getJSON('/SaleRecords/GetSellers'), null, function (result) { // My path
            var ddl = $('#SellerId'); // My seller DDL
            ddl.empty();
            $('Sellers').show(); // My div (it's display: none)
            $(result).each(function () {
                ddl.append(
                $('<option />', {
                    value: this.Id
                }).html(this.Name)
                );
            });
        };
    });
</script>

Why isn't the data showing up in my view even though I can see that the sellersList has 3 records in the controller? What could be causing this issue?

Answer №1

It seems like there may be a potential problem here

$.getJSON('/SaleRecords/GetSellers'), null, function (result) // this line could potentially cause an error

Please consider using the following approach instead

$.getJSON('/SaleRecords/GetSellers')
.done(function(result) {
        var ddl = $('#SellerId');
        ddl.empty();
        $('Sellers').show();
        $(result).each(function () {
            ddl.append(
            $('<option />', {
                value: this.Id
            }).html(this.Name)
 });
 .fail(function(jqXHR) {console.log(jqXHR.responseText)});

Answer №2

After a thorough investigation, I finally identified the issue: I included the following line in my controller method:

myContext.Configuration.ProxyCreationEnabled = false;

I wanted to share this discovery so that anyone experiencing similar difficulties can benefit from the solution.

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