How to change one point's shape of a series (just like one point is rectange square and other is default shape like point?

[PEIYANG]

How to change one point's shape of a series (just like one point is rectange square and other is default shape like point?

[Petar Marchev]

Hello Peiyang,

Unfortunately the SeriesMappings of the RadChart do not offer such a point-template-selector functionality. In this help topic you can see how you can customize the point marks. You can see that in order to switch between different visuals - this logic needs to be implemented inside the ControlTemplate.

Regards,
Petar Marchev
the Telerik team

[PEIYANG]

Can you give me a code example?I have some data ,find a data<0;and I want this point is rectange square and other is default shape like point

[PEIYANG]

I find this solvelution,but it is only affact at first time when chart load first ,but when I change the itemsource,it is unaffact because pointMarks.Count==0,but actually it must not be 0
void markdiff(){
           List<PointMark> pointMarks =
               RadChart1.ChildrenOfType<PointMark>().ToList();
            List<PointMark> selectedPointMark = new List<PointMark>();
      
            if (pointMarks.Count != 0)
            {
                foreach (var item in newDataSource)
                    selectedPointMark.Add((from n in pointMarks
                                           where condiction).First());

 

                this.SetPointMarkSelectedState(selectedPointMark);
            }
        }
        private void SetPointMarkSelectedState(List<PointMark> selectedPointMark)
        {
          
                foreach (var item in selectedPointMark)
                {
                    item.Fill = new SolidColorBrush(Colors.Red);
                    item.Shape = MarkerShape.Triangle;
                    item.Size = 12;
                }
      

           }

[Petar Marchev]

Hi Peiyang,

I have attached a very simple app that demonstrates one approach you may apply. You will need to override the logic inside the PlotInfoToVisibilityConverter that determines whether a Border should be visible or not. Let us know if this helps.

Greetings,
Petar Marchev
the Telerik team