For such customization you need to modify the template of the control. The proper way to achieve this is via Implicit Styles
with NoXAML binaries
. Please check the Setting a Theme(Using Implicit Styles)
for more information on the matter.
Modifying/removing the Validation tooltip depends on which validation approach is being used. You can check the Validating
article for more information on the different types of data validation that RadGridView
In your case, since you validate data using CellValidating
event, the validation is being performed in edit mode. In such scenario the Validation tooltip depends on GridViewEditorPresenter
element. The different elements on which the Validation tooltip depends are described in the Styling Validation Tooltips
So, for removing the Validation tooltip, please search for ControlTemplate
. It is located in Telerik.Windows.Controls.xaml file. Within it you need to remove all VisualStateGroups
I hope this helps.