Question

I have an MVC3 application that I have a view defined to have the possibility of passing values and setting the SelectedItem value.

List<SelectListItem> items = new SelectList(db.BILLING_COUNTRY, "ISO_Code_BillingCountry", "CountryName", Country).AsParallel().ToList();
        items.Insert(0, (new SelectListItem { Text = "Select Your Country", Value = "0" }));
        ViewBag.Countries = items;

I am setting the disabled = “disabled” attribute on the dropdownlist if a ViewBag.EnableDropDowns is false or not set.

@{ object displayMode = (ViewBag.EnableDropDowns) ? null : new { disabled = "disabled"     };
           @Html.DropDownList("Countries", null, new { disabled = displayMode, onchange     = "LoadItems()" } )
        }

I set the ViewBag.EnableDropDowns to true, it correctly sets all the values in the drop down list but they are disabled instead of enabled.

What is wrong?

Answer 1

Be careful with the dictionary declaration. It has to beDictionary<string, object>() otherwise you will face run time issues.

I have to disable the listbox based upon a condition.

@{
var sourceListOptions = new Dictionary<string, object>();
sourceListOptions.Add("style", "Height: 250px; width: 225px;");
if (Model.SourceColumns.Count() == Model.ImportMappings.Count())
{
    sourceListOptions.Add("disabled", "disabled");
}

}

@Html.ListBox("SourceColumns", Model.SourceColumns, sourceListOptions)

or

@Html.DropDownList("SourceColumns", Model.SourceColumns, sourceListOptions)