I would like to display the validation error in the tooltip of a radgridview cell so when the user hovers over the cell the validation message will be displayed when the grid's RowIndicatorVisibility="Collapsed". I can see the error when hovering over the right top corner of the cell but that is very small and our users aren't sophisticated. I've tried creating a style but its not working.

Thank you for your help.
Mark

Hello Mark,

In order to display ToolTips when you hover over the invalid cell you can check our Validation WPF / Silverlight demo. As for the size and styling of the ToolTip, you can use implicit styles to style it to your liking.

Also, I attached a sample project that demonstrates the approach in the mentioned demo and uses implicit styles to customize the appearance of the ToolTip. 

Please examine both examples and let us know if this helps.

Regards,
Boris Penev
Telerik