I'm in internship for a month and i'm using Chart and tooltip :
Dim serie As System.Windows.Forms.DataVisualization.Charting.Series = mydata.getSeries()
For i = 0 To serie.Points.Count - 1
For Each ser As System.Windows.Forms.DataVisualization.Charting.Series In Chart1.Series
ser.Points.Add(serie.Points(i))
Next
Next
'Chart1.Series(1).LabelToolTip = "why"
Points I add to ser has tooltip but when i launch the app, i can't see tooltip. If i uncomment the last line, i can see the tooltip. I can put anything to replace "why" but i must put something or i couldn't see tooltip of point. So atm my code works but i dont understand why I need this line
Chart1.Series(1).LabelToolTip = "why"
I would like to understand my code ^^
Thanks and sorry for my bad english
I think I understand your question now.
The reason why you're not seeing your tooltips is because each point has to be given a value for its LabelToolTip property.
So here's what you could do:
Now, each point will have a LabelToolTip. Previously, you weren't setting the tooltips, and they will not display until they are set.