//public static string CurrentAction(this UrlHelper urlHelper) {
// var routeValueDictionary = urlHelper.RequestContext.RouteData.Values;
// // In case using virtual dirctory
// var rootUrl = urlHelper.Content("~/");
// return string.Format("{0}{1}/{2}/", rootUrl, routeValueDictionary["controller"], routeValueDictionary["action"]);
//}
public static string CurrentActionPath(this ViewContext viewContext)
{
var rootUrl = viewContext.RootUrl();
var areaName = viewContext.AreaName();
if (!String.IsNullOrEmpty(areaName))
{
areaName += "/";
}
var controllerName = viewContext.ControllerName();
var actionName = viewContext.ActionName();
return(string.Format("{0}{1}{2}/{3}/",
rootUrl,
areaName,
controllerName,
actionName));
}
/// <summary>
/// Process TagHelper
/// </summary>
/// <param name="context">TagHelperContext</param>
/// <param name="output">TagHelperOutput</param>
public override void Process(TagHelperContext context, TagHelperOutput output)
{
// Return if no menu or items to output
if (Menu is null || Menu.Items.Count == 0)
{
output.SuppressOutput();
return;
}
// Setup objects
var currentController = ViewContext.ControllerName().ToLower(CultureInfo.InvariantCulture);
var currentAction = ViewContext.ActionName().ToLower(CultureInfo.InvariantCulture);
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
// Build the menu
BuildMenu(
Menu.Items,
mi => mi.Controller.ToLower(CultureInfo.InvariantCulture) == currentController,
mi => mi.Controller,
el => output.Content.AppendHtml(el)
);
// Set output properties
output.TagName = WrapperElement;
output.TagMode = TagMode.StartTagAndEndTag;
output.Attributes.Add("class", WrapperClass);
// Build a menu (allows recursion for child menus)
//
// items: The menu items to build a menu for
// isActive: Function which determines whether or not the current item is the active page
// getText: If MenuItem.Text is null, returns the text to show in the link
// append: Action to append the element to the menu wrapper
void BuildMenu(List <MenuItem> items, Func <MenuItem, bool> isActive, Func <MenuItem, string> getText, Action <TagBuilder> append)
{
// Add each menu item to the menu
foreach (var menuItem in items)
{
// Create item element
var item = new TagBuilder(ItemElement);
item.AddCssClass(ItemClass);
// Create link element
var link = new TagBuilder("a");
link.AddCssClass(LinkClass);
// Add GUID
link.MergeAttribute("id", $"link-{menuItem.Id}");
// Check whether or not this is an active link / section
if (isActive(menuItem))
{
link.AddCssClass(LinkActiveClass);
}
// Generate the link URL
var urlActionContext = new UrlActionContext
{
Controller = menuItem.Controller,
Action = menuItem.Action,
Values = menuItem.RouteValues
};
link.Attributes.Add("href", urlHelper.Action(urlActionContext));
// Add link text - if not set use getText() function
_ = link.InnerHtml.Append(menuItem.Text ?? getText(menuItem));
// Add the link to the list item
_ = item.InnerHtml.AppendHtml(link);
// Check for child menu
if (IncludeChildren && menuItem.Children.Count > 0)
{
// Create child menu wrapper
var childMenu = new TagBuilder(WrapperElement);
childMenu.AddCssClass(ChildMenuWrapperClass);
// Build child menu
BuildMenu(
menuItem.Children,
mi => mi.Action.ToLower(CultureInfo.InvariantCulture) == currentAction,
mi => mi.Action,
el => childMenu.InnerHtml.AppendHtml(el)
);
// Add child menu to item
_ = item.InnerHtml.AppendHtml(childMenu);
}
// Append item
append(item);
}
}
}
