Well, first of all, it worked like a charm, so many thanks.

However we are very concerned with this new release of infragistics 2015.1, specifically for jquery, asp.net mvc helpers, because we can see many methods in API publication web site Infragistics and they simply do not work correctly, by the other hand, the method that you shared wich solved our first problem, it is not in the API documentation.

Right now I am trying to select a item in IgCombo with this Code:

var currentItemSelected = $("#cmbTIpoSolicitud").igCombo('selectedItems');
var newDataSource = $("#cmbTIpoSolicitud").igCombo('items');
for (var i = 0; i < newDataSource.length; i++) {
      if (newDataSource[i].data.Id == "G") {
      newDataSource.splice(i, 1); // removes 1 element at position i
      break;
      }
}

$("#cmbTIpoSolicitud").igCombo({ dataSource: newDataSource });
$("#cmbTIpoSolicitud").igCombo("dataBind");

$("#cmbTIpoSolicitud").igCombo("select", currentItemSelected);

But it does not work, I mean it does not select any item in igCombo.

Many thanks in advance.