Hi Laci,
Thanks for your interest in Syncfusion Products.
In the attached sample, GridDataBoundGrid is binded with list of custom objects using BindingList. While trying to save the new record added which is in edit mode through a button click event, it is getting saved by rebinding the datasource to grid.
//Event button1_Click
gridBindingList.Add(new CustomClass(0010, "Barac", "umar", "BCD", "cityname",60000));
gridDataBoundGrid1.DataSource = gridBindingList;
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=GDBC_UpdateAndAdd-787675697.zipRegards,
Ranjeet