ASP.NET MVC
要完成这样的效果<option disabled="disabled">don't click this</option> public class CustomSelectItem : SelectListItem{ public bool Enabled { get; set; }}public static class CustomHtmlHelpers{ public static MvcHtmlString MyDropDownList(this HtmlHelper html, IEnumerable<CustomSelectItem> selectList) { var selectDoc = XDocument.Parse(html.DropDownList("", (IEnumerable<SelectListItem>)selectList).ToString()); var options = from XElement el in selectDoc.Element("select").Descendants() select el; foreach (var item in options) { var itemValue = item.Attribute("value"); if (!selectList.Where(x => x.Value == itemValue.Value).Single().Enabled) item.SetAttributeValue("disabled", "disabled"); } // rebuild the control, resetting the options with the ones you modified selectDoc.Root.ReplaceNodes(options.ToArray()); return MvcHtmlString.Create(selectDoc.ToString()); }}
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