Hi Graham,

                      Thanks for your reply. I have tried your proposed solution but I am stuck in one thing earlier pointinfo was deriving frameworkelement class which is responsible for setting databinding or setbinding method for pointinfo instance in chartbehaviour class. But if I make pointinfo as dependency it wouldnt allow me to set binding can you please suggest something in this regard thanks.

Hi,

Modifying the contents of the Points collection in the attached property should update the annotations dynamically. So, for example, if you wanted to add an additional annotation programatically, you could do something like this:

ChartBehaviors.GetChartPoints(chart1).Points.Add(new PointInfo() { X = 4, Y = 10, DataIndex = 3 });

But if you wanted to set X and Y via a binding, you would have to make PointInfo a Dependency object and change X and Y to be dependency properties and have PointInfo implement INotifyPropertyChanged. Then your ChartPointsBehavior would have to register and unregister to the property changed event for these point info's to know when the visuals need to be refreshed based on the X and Y values changing. This increases the complexity of this sample somewhat, so is left as an excercise to the reader, but is not that difficult to implement. Let me know if you need any further advice.

Hope this helps!

-Graham

Hi Graham,

                       Thanks for the solution its working fine but only problem with this solution is its points on which annotation needs to deffine are statice and I have tried to make it dynamic but I am not success full in it. Moreover position of annotation which is based on X and Y value in PointInfo how can I make them dynamic as well, I tried to bind my maker point values with it but its not working. Can you please suggest the solution. Moreover did you guys find out any solid solution for this problem.

Thanks.