Hi robpolak.

My scenary maybe is the same, i solved, but, i can get the id of the row, i'm using an image, is the same way for a ActionLink don't worry, and change to another page, maybe you can apply, but open a popup. this is the code:

@model IQueryable<CxCModels.Models.tblPaises>
@using Infragistics.Web.Mvc;

@{
    ViewBag.Title = "Catalogo de Pais";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
 <script type="text/javascript">

     function obtenerDato() {
         var cell = $('#gridPaises').igGridSelection('selectedCell');
         var dataview = $('#gridPaises').data('igGrid').dataSource.dataView();
         if (cell == null) {
             window.alert("Debe Seleccionar un renglon de la tabla.")
             return;
         }
         var cellRowId = dataview[cell.rowIndex]["idPais"];
         return cellRowId;
     }
     function crear() {
         var adress = '@Url.Action("Create")';
         window.location = adress;
     }
     function detalle() {
         var id = obtenerDato();
         var adress = '@Url.Action("Details")' + "/" + id;
         window.location = adress;
     }
     $(document).ready(function () {

         $("#gridPaises").live("iggridrendered", function (event, args) {

             args.owner.element.find("tr:even").addClass("ui-ig-altrecord");

         });

     });
 </script>

 <div class="AlinearIzquierda">
    <table style="width: 750px">
        <tr class ="Titulos">
                <td>Catalogo de Paises </td>
                <td>&nbsp</td>
                <td style="text-align:right"> <img alt="Agregar Cliente" src="@Url.Content("~/Content/Iconos/AGREGARM.png")" onclick="crear()" /></td>
        </tr>
    </table>
@using (Html.BeginForm("Index", "Paises"))
{
   
    <br />
   
    @(Html.Infragistics().Grid(Model).ID("gridPaises").PrimaryKey("idPais").AutoGenerateColumns(false).FixedHeaders(true).AutoGenerateLayouts(false).AutoCommit(true).DefaultColumnWidth("190px").Width("750px")
    .JQueryTemplating(true)
    .RowTemplate("<tr><td><img alt='Detalle' onclick='detalle()' src='../../../../Content/Iconos/consultarTabla.png' /></td><td>${idPais}</td><td>${Nombre}</td></tr>")
    .Columns(column =>
    {
        column.For(x => x.idPais).HeaderText(" ").Width("30px").Column.Key = "Detalle";
        column.For(x => x.idPais).HeaderText("Pais");
        column.For(x => x.Nombre).HeaderText("Nombre");
    })
        .Features(features =>
        {
            features.Sorting().ColumnSettings(settings =>
            {
                settings.ColumnSetting().ColumnKey("Detalle").AllowSorting(false);
            });
            features.Selection().Mode(SelectionMode.Cell).MultipleSelection(false);
            features.Paging().Type(OpType.Local).PagerRecordsLabelTemplate("${startRecord} - ${endRecord} de ${recordCount} registros").PageSize(10).FirstPageLabelText("").FirstPageTooltip("Ir a primera pagina").PrevPageLabelText("").PrevPageTooltip("Ir a pagina Anterior").ShowPagerRecordsLabel(true)
            .LastPageLabelText("").LastPageTooltip("Ir a Ultima pagina").NextPageLabelText("").NextPageTooltip("Ir a Siguiente pagina").PageSizeDropDownLabel("Mostrar").PageSizeDropDownTrailingLabel("Registros");
            features.Filtering().Type(OpType.Local).FilterButtonLocation(Location.Left)
            .ColumnSettings(settings =>
            {
                settings.ColumnSetting().ColumnKey("Detalle").AllowFiltering(false);
            });
        })
        .Height("415")
        .DataSourceUrl(Url.Action("Index"))
        .DataBind().Render()
    )
}
</div>

i hope this helps.

Regards