I have a grid containing dropdown column bind to the field named ChartTypeId. It has a custom template which display the ChartTypeName. The problem, it sorts the column by ChartTypeId. How can I modify it to sort by ChartTypeName instead of ChartTypeId?
1.{2.  field: "ChartTypeId",3.  title: "Chart Type",4.  width: "auto",5.  template: "${ChartTypeName}",6.  editor: ChartTypeDropDownEditor,7.  editable: true,      8.},