Hi Vladymyr,
You can try handling TableControlPrepareViewStyleInfo or QueryCellStyleInfo and set the error message in the CellTipText property.
private void gridGroupingControl1_QueryCellStyleInfo(object sender, GridTableCellStyleInfoEventArgs e)
{
GridTableCellStyleInfo style = e.Style as GridTableCellStyleInfo;
if(e.TableCellIdentity.DisplayElement.Kind == DisplayElementKind.Record )
{
e.Style.CellTipText = "Your Error message";
}
}
Please refer the attached the sample that validates the cell value and shows the ErrorProvider with respect to the current cell in a button click.
Here is the link for the sample:
http://websamples.syncfusion.com/samples/Grid.Windows/F59467/main.htmKindly let us know if this helps.
Best Regards,
Jeba