How Can i keep the old value in a combo box cell?

Hi every body;
i have a control grid in my application.It has a Combo box column.I want check if user select a reapited item of combo box column in a row that be selected in another rows, the system shows a massege and return the old item in cell (if exists).so how can i do this?

Hi Shayesteh,

Thanks for your interest in Syncfusion products.

This feature can be achieved by means of two event handlers in gridcontrol: CurrentCellShowingDropDown and CurrentCellCloseDropDown.

Please refer the following sample to achieve this feature.

http://websamples.syncfusion.com//samples/Grid.Windows/F77340/main.htm

Please let me know if this helps.

Regards,
Rajadurai