ASP.NET MVC URL routing and paging with HTMLHelper

Question

I have a route

routes.MapRoute(
                "AlphaPagedContacts", // Route name
                "Contact/Alpha{alpha}", // URL with parameters
                new { controller = "Contact", action = "AlphaList", alpha = UrlParameter.Optional },
                new { alpha = @"\A-Z" } // Parameter defaults
            );

I'm trying to make the URL's display like

/Contact/AlphaA
/Contact/AlphaB

for contacts based on username. However, the URL's are showing up as: http://localhost:54568/Contact/AlphaList?alpha=H

My HTMLHelper is

@Html.AlphaLinks(new PagingModel { MaxPages = Model.MaxPages, CurrentLetter = Model.CurrentLetter, UrlGeneratorFunctionAlpha = i => Url.Action("AlphaList", new { alpha = i }) })

and my implementation is

    public static MvcHtmlString AlphaLinks(this HtmlHelper helper, PagingModel model)
    {
        string[] letters = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
        var stringBuilder = new StringBuilder("<ul class='pager'>");

        foreach (string letter in letters)
        {
            stringBuilder.Append(String.Format("<li {2}><a href='{1}'>{0}<a></li>", letter, model.UrlGeneratorFunctionAlpha(letter), letter == model.CurrentLetter ? "class=Selected" : String.Empty));
        }
        stringBuilder.Append("</ul>");
        return MvcHtmlString.Create(stringBuilder.ToString());
    }

My controller code for the actionresult is:

public ActionResult AlphaList(string alpha = "A")
    {
        var logic = new ContactBUS();
        var pageSize = 10;

        var usernames = from c in XDocument.Load(System.Web.HttpContext.Current.Server.MapPath("~/App_Data/Contacts.xml")).Elements("Contact")
                        select new
                        {
                            Username = (string)c.Element("Username"),
                            Lastname = (string)c.Element("LastName"),
                            Firstname = (string)c.Element("FirstName"),
                            Email = (string)c.Element("Email"),
                        };

        var model = new AlphaListContactViewModel
        {
            Contacts = logic.GetContacts().Skip(0).Take(20).ToList(),
            CurrentLetter = alpha,
            MaxPages = (int)Math.Ceiling(logic.GetContactsCount() / (double)pageSize)
        };
        return View(model);
    }

Any idea why this is happening? Also, I need to make it so that when the user clicks on a letter, it shows the contacts' usernames for that letter. Any help would be greatly appreciated.

Kevin Collins · Accepted Answer · 2011-11-19 19:34:02Z

1

Do you have any other routes that come before the one we see here? The first route that matches wins.

answered Nov 19, 2011 at 19:34

Kevin Collins

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4 Comments

integral100x Over a year ago

i have another route, but it's after this one

Kevin Collins Over a year ago

The constraint regex maybe? Try @"[A-Z]"

integral100x Over a year ago

Great. That solved that problem. Now I need to make it so that when a user clicks on the letter, it shows the usernames starting with that letter. I posted my controller code (see above).

Kevin Collins Over a year ago

Something like this maybe: logic.GetContacts().Where(c => c.UserName.StartsWith(alpha)).Skip(0).Take(20).ToList()

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