public static IHtmlString OptGroupDropDownList(this HtmlHelper helper, string name, IEnumerable <OptGroupSelectListItem> items = null, object htmlAttributes = null)
{
OptGroupDropDownList ogddl = new OptGroupDropDownList(name, items, htmlAttributes);
StringBuilder sb = new StringBuilder();
ogddl.Render(sb);
return(new HtmlString(sb.ToString()));
}
public static IHtmlString OptGroupDropDownListFor <TModel, TProperty>(this HtmlHelper <TModel> helper, Expression <Func <TModel, TProperty> > expression, IEnumerable <OptGroupSelectListItem> items = null, object htmlAttributes = null)
{
Func <TModel, TProperty> func = expression.Compile();
var selected_value = func(helper.ViewData.Model);
string id = helper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(ExpressionHelper.GetExpressionText(expression));
string name = helper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression));
OptGroupDropDownList ogddl = new OptGroupDropDownList(name, items, htmlAttributes)
{
SelectedValue = selected_value
};
StringBuilder sb = new StringBuilder();
ogddl.Render(sb);
return(new HtmlString(sb.ToString()));
}
