How to Show a Tooltip on a WPF Control When it is Disabled
By Michael Detras
By default, tooltips are not shown when a control is disabled. This can be changed by using ToolTipService.
Use the ShowOnDisabled attached property of the ToolTipService.
<TextBox
ToolTip="Show Me When Disabled"
IsEnabled="False"
ToolTipService.ShowOnDisabled="True"/>
Related FAQs
In WPF, you can display the validation error in a tooltip using a trigger. We can also add a red asterisk beside the control to indicate the error.
How to Show a Tooltip on a WPF Control When it is Disabled (1416 Views)