Hi Tigger,
Thank you for your interest in Syncfusion products.
We have prepared a CustomGridComboBoxCellRendereclass to achieve your requirement. Please download the sample from the following location:
Sample Link:
http://www.syncfusion.com/uploads/redirect.aspx?file=Timesheet_3fecf0fe.zip&team=developmentC# code for add new cell type to GridControl:
fpTimesheet.Model.CellModels.Remove("ComboBox")
fpTimesheet.Model.CellModels.Add("ComboBox", New CustomGridCellComboBoxCellModel())
Let us know if you face any other issues.
Regards,
Jeraldes J