private static IHtmlString BuildListBox(string name, string defaultOption, IEnumerable <SelectListItem> selectList,
object selectedValues, int?size, bool allowMultiple, IDictionary <string, object> htmlAttributes)
{
//var modelState = ModelState[name];
//if (modelState != null)
{
selectedValues = selectedValues;// ?? ModelState[name].Value;
}
if (selectedValues != null)
{
IEnumerable values = (allowMultiple) ? ConvertTo(selectedValues) : new[] { selectedValues.ToString() };
var newSelectList = new List <SelectListItem>();
var selectedValueSet = new HashSet <string>(from object value in values
select Convert.ToString(value, CultureInfo.CurrentCulture),
StringComparer.OrdinalIgnoreCase);
bool previousSelected = false;
foreach (var item in selectList)
{
bool selected = false;
// If the user's specified allowed multiple to be false
// only pick up the first item that was selected.
if (allowMultiple || !previousSelected)
{
selected = item.Selected || selectedValueSet.Contains(item.Value ?? item.Text);
}
previousSelected = previousSelected | selected;
newSelectList.Add(new SelectListItem(item)
{
Selected = selected
});
}
selectList = newSelectList;
}
var tagBuilder = new TagBuilder("select")
{
InnerHtml = BuildListOptions(selectList, defaultOption)
};
//if (UnobtrusiveJavaScriptEnabled)
//{
// // Add validation attributes
// var validationAttributes = _validationHelper.GetUnobtrusiveValidationAttributes(name);
// tagBuilder.MergeAttributes(validationAttributes, replaceExisting: false);
//}
tagBuilder.GenerateId(name);
tagBuilder.MergeAttributes(htmlAttributes);
tagBuilder.MergeAttribute("name", name, true);
if (size.HasValue)
{
tagBuilder.MergeAttribute("size", size.ToString(), true);
}
if (allowMultiple)
{
tagBuilder.MergeAttribute("multiple", "multiple");
}
else if (tagBuilder.Attributes.ContainsKey("multiple"))
{
tagBuilder.Attributes.Remove("multiple");
}
// If there are any errors for a named field, we add the css attribute.
//AddErrorClass(tagBuilder, name);
return(tagBuilder.ToHtmlString(TagRenderMode.Normal));
}
