1. ASP.NET MVC
Templated Razor Delegates
Jason

2. Templated Razor Delegates
Index.cshtml
@{
Func<dynamic, object> strongTag = @<strong>@item</strong>;
}
<span>This sentence is @strongTag("Jason").</span>

3. @Helper Syntax
Index.cshtml
@helper Create(string name, int age)
{
<p>
<span>@name</span>
<span>@age</span>
</p>
}
@Create("Jason", 18)

4. @Helper Syntax
Person.cshtml in App_Code Folder
@helper Create(string name, int age)
{
<p>
<span>@name</span>
<span>@age</span>
</p>
}
Index.cshmtl
@Person.Create("Jason", 18)

5. HelperResult Class
Index.cshtml
@{
var items = new[] { "one", "two", "three" };
}
<ul>
@items.List(@<li>@item</li>)
<ul>

6. HelperResult Class
RazorExtensions.cs
public static HelperResult List<T>(this IEnumerable<T> items,
Func<T, HelperResult> template)
{
return new HelperResult(writer =>
{
foreach (var item in items)
{
template(item).WriteTo(writer);
}
});
}

7. Reference
 Templated Razor Delegates
 http://haacked.com/archive/2011/02/27/templated-razor-
delegates.aspx
 Helper syntax within Razor
 http://weblogs.asp.net/scottgu/archive/2011/05/12/asp-net-mvc-3-
and-the-helper-syntax-within-razor.aspx
 MSDN-HelperResult
 http://msdn.microsoft.com/zh-
tw/library/system.web.webpages.helperresult(v=vs.111).aspx