private static string BooleanTemplateDropDownList(bool? value,
IDictionary<string, object> additionalValues,
object attributes = null)
{
StringBuilder builder = new StringBuilder();
var htmlAttributes = HtmlHelper.AnonymousObjectToHtmlAttributes(attributes);
var dataAttributes = additionalValues.GetDataAttributes();
var customAttributes = additionalValues.GetCustomAttributes();
dataAttributes.MergeAttributes(customAttributes);
TagBuilder selectTag = new TagBuilder("select");
selectTag.AddCssClass("list-box");
selectTag.AddCssClass("tri-state");
selectTag.Attributes["disabled"] = "disabled";
selectTag.MergeAttributes(dataAttributes);
selectTag.MergeAttributes(htmlAttributes);
builder.Append(selectTag.ToString(TagRenderMode.StartTag));
foreach(SelectListItem item in Html5DefaultEditorTemplates.TriStateValues(value))
{
builder.Append(Html5SelectExtensions.ListItemToOption(item));
}
builder.Append(selectTag.ToString(TagRenderMode.EndTag));
return builder.ToString();
}
