A quick and easy repeater for Razor.

RazorExtensions.cs

public static class RazorExtensions
{

    // a quick and simple repeater helper method
    // header and footer templates could be added
    public static HelperResult Repeater<T>(
        this IEnumerable<T> items,
        Func<T, HelperResult> itemTemplate,
        Func<T, HelperResult> alternatingItemTemplate = null,
        Func<T, HelperResult> separatorTemplate = null)
    {
        return new HelperResult(writer =>
        {
            if (items.Count() > 0)
            {
                var last = items.Last();
                int i = 0;
    
                foreach (var item in items)
                {
                    var func = (i % 2 != 0 && alternatingItemTemplate != null) ? alternatingItemTemplate : itemTemplate;
    
                    func(item).WriteTo(writer);
    
                    if (separatorTemplate != null && !item.Equals(last))
                    {
                        separatorTemplate(item).WriteTo(writer);
                    }
    
                    i++;
                }
            }
        });
    }
}

// Usage
@{
    var names = new string[] { "Jeremy", "Jason", "Jeffrey", "John", "Jethro" };
}

@names.Repeater(@<p class="classOne">@item</p>, alternatingItemTemplate: @<p class="classTwo">@item</p>, separatorTemplate: @<hr />)

Hello jwmcpeak
It seems the best implementation I've ever seen but I can't make it work because I don't know where I have to put the public class Helperresult Repeater in my MVC3 project. I put it inside one of the controllers I have, but when I try to use it from a view, it doesn't recognize .Repeater method of @NAMEs var.
Could you help me please?
Thanks.

Howdy, artcarrion. This is a helper method, so it needs to be defined within a public/internal static class. See http://msdn.microsoft.com/en-us/library/bb383977.aspx for info on extension methods.

On Mon, Oct 17, 2011 at 10:55 AM, artcarrion < ***@***.***>wrote: Hello jwmcpeak It seems the best implementation I've ever seen but I can't make it work because I don't know where I have to put the public class Helperresult Repeater<T> in my MVC3 project. I put it inside one of the controllers I have, but when I try to use it from a view, it doesn't recognize .Repeater method of @NAMEs var. Could you help me please? Thanks. ## Reply to this email directly or view it on GitHub: https://gist.github.com/890773

## ## Jeremy McPeak Author, Professional Ajax 2nd Edition (http://amzn.to/9DgecT) Author, Beginning JavaScript 4rd Edition (http://amzn.to/9Dvjud) .NET and JavaScript Reviewer, CodeCanyon http://codecanyon.net