I'm new to the Infragistics products as well as the MVC application I'm working on. There is an igGrid that I'd like to enable for multi-column (MC) sorting. I've looked at a fair amount of the online documentation, and I see that MC sorting capability exists, but I haven't found any sample code that illustrates how to enable it. Below is the code I'm using to do the setup.

When I run the application, the grid shows indicators that the 2 specified columns are sorted; however, when I add a new row to the grid, the row set is not sorted. Is there something I need to do/enable so that the grid remains sorted?

Excerpt from relevant .cshtml file:

...

    .Features(
        features =>
        {
            // Start of added code ?20120720-n
           features.Sorting()
               .Mode(SortingMode.Multiple)  // Sort on multiple cols
               .ColumnSettings(settings =>
               {
                   // SORT: 1st on CrewNumber, 2nd on Event
                  settings.ColumnSetting().ColumnKey("CrewNumber").AllowSorting(true).CurrentSortDirection("ascending"); // "asc" or "ascending"; "desc" or "descending"
                  settings.ColumnSetting().ColumnKey("Event").AllowSorting(true).CurrentSortDirection("ascending");
               });
           // End   of added code ?20120720-n
            features
               .Resizing().ColumnSettings(settings =>
               {
                  settings.ColumnSetting().ColumnKey("IpSn").AllowResizing(false); 
                  settings.ColumnSetting().ColumnKey("IpTx").AllowResizing(false);

               });
           features.Updating()
               .EnableAddRow(false)
               .EnableDeleteRow(!isReadOnly && !disableChangingPreloadedEvents)

...