First of all I should say that using the ItemTooltipOpening
in code-behind doesn't breaks the concept of MVVM. However this is my opinion - it's up to you to embrace it or not.
The example attached below demonstrates how you may show customized tooltips with the use of RadTooltipService
and without any code-behind. Here's a short explanation of the approach - you should retemplate your series definition and add your own DataTemplate that will be used to visualize the tooltip. The content of the tooltip comes from the propeties of the DataItem
Let me know how this works for you.
the Telerik team
Sharpen your .NET Ninja skills
! Attend Q1 webinar week and get a chance to win a license! Book your seat now >>