Question

Cat I create a delegate on @helper function?

@helper DisplayCategoryTree(int? parentId)
{       

   Func<Category, CategoryNode, MvcHtmlString> act = new Func<Category, CategoryNode, MvcHtmlString>(GetChildItem);
   act(Category, CategoryNode);

}

@helper GetChildItem(Category, CategoryNode)
{     


}

Answer 1

The razor helpers are returning System.Web.WebPages.HelperResult which implements IHtmlString so you can use that instead of MvcHtmlString.

So this declaration should work fine:

@helper DisplayCategoryTree(int? parentId)
{       

   Func<Category, CategoryNode, IHtmlString> act = 
       new Func<Category, CategoryNode, IHtmlString>(GetChildItem);
   act(Category, CategoryNode);
}

@helper GetChildItem(Category, CategoryNode)
{    
}