Hide tooltip if binding is null

Question

Currently i\'ve got the following code to show a tooltip.

Answer 1

This is a WPF answer (haven't tried it in Silverlight).

Use ToolTipService.IsEnabled, and bind it to the tooltip property. Then use a converter to convert the tooltip string to a bool.

For example, I have the following:

...

Or in code-behind

ToolTipService.SetIsEnabled(textBlock, false);