RadChartView Horizontal Axis for duplicate dates

[Tarun]

Hi All,

I have a requirement to plot date time data on the RadCartesianChart, I have multiple series but each has a value and a datetime , what type of Horizontal Axis should I be choosing if my collection can have multiple points for the same date time? 

So for example, for 27th October 2013, I expect the series to have,
DateTime                          Value
27/10/2013 1:45:00 62.5
27/10/2013 2:00:00 32.5
27/10/2013 2:15:00 32.5
27/10/2013 2:30:00 32.5
27/10/2013 2:45:00 32.5
27/10/2013 2:00:00 99.1
27/10/2013 2:15:00 99.1
27/10/2013 2:30:00 100.2
27/10/2013 2:45:00 65.5
27/10/2013 3:00:00 32.5

Please refer to the attached screen shot of how I would expect the graph to look (please ignore the values on the y axis in the graph, they will not match with those specified in the example above). 

For those familiar with financial vertical would recognize this as the Long day when the clock change takes place and the 2nd hour is duplicated when dealing with GMT +1 timezone.  

Regards,
Tarun

[Petar Kirov]

Hi Tarun,

Generally, for plotting DateTime data on the horizontal axis you can use DateTimeContinuousAxis which may be configured like this:

<telerik:DateTimeContinuousAxis MajorStep="15"
                      MajorStepUnit="Minute"
                      LabelFitMode="Rotate"
                      LabelRotationAngle="-90"
                      LabelFormat="dd/MMM/yyyy HH:mm:ss" />

As for the Daylight saving time support, the control relies on the .NET Framework and does not provide specific options for customizing its behavior.

First I would recommend reading this blog post on MSDN, detailing the problems associated with DST. It will give you some ideas about how to deal with it. 
Next for RadCartesianChart you can use a label template with a converter to change axis labels presentation as per your requirement.

I have attached a small project were you can test your solution.

I hope this helps.
 
Regards,
Petar Kirov
Telerik