gistfile1.cs

public class SomeViewModelBinder : DefaultModelBinder
{
	public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
	{
		int currentPage = 1;
		int itemsPerPage = 8;

		var page = bindingContext.ValueProvider.GetValue("page");

		if (page != null)
		{
			int.TryParse(page.AttemptedValue, out currentPage);
		}

		var recordsPerPage = bindingContext.ValueProvider.GetValue("rp");

		if (recordsPerPage != null)
		{
			int.TryParse(recordsPerPage.AttemptedValue, out itemsPerPage);
		}

		var query = bindingContext.ValueProvider.GetValue("query");
		var orderBy = bindingContext.ValueProvider.GetValue("sortname");
		var sortOrder = bindingContext.ValueProvider.GetValue("sortorder");
		
		var model = base.BindModel(controllerContext, bindingContext) as SomeViewModel;

		if (model != null)
		{
			model.Query = query == null ? string.Empty : query.AttemptedValue;
			model.CurrentPage = currentPage;
			model.ItemsPerPage = itemsPerPage;
			model.OrderBy = orderBy == null ? string.Empty : orderBy.AttemptedValue;
			model.OrderDirection = sortOrder == null ? string.Empty : sortOrder.AttemptedValue;

			return model;
		}

		return null;
	}
}