public static IHtmlString RenderGridHeader(RequestContext requestContext, string headerText, string propertyName, int propertyOrder)
{
var html = @"<a href=""{0}"">{1}<img class=""icon arrow"" src=""{2}""></a>";
var sortDir = "asc";
if (IsSortField(requestContext, propertyName, propertyOrder))
{
sortDir = requestContext.GetRequestValue("sortDir") == "asc" ? "desc" : "asc";
}
var sortUrl = requestContext.UrlHelper().Action(requestContext.GetRequestValue("action"),
requestContext.AllRouteValues().Merge("sortField", propertyName).Merge("sortDir", sortDir));
return(new HtmlString(string.Format(html, sortUrl, headerText, requestContext.UrlHelper().Content("~/Images/invis.gif"))));
}
