"No Data Available" on 2nd call of Sub

[jon_m]

 I have a chart that plots well from data passed in from a  DataSet Table. The DataSet is cleared at the start of the Sub ('Display'). I have tried chart methods;   'Chart1.DataSource = Nothing   'Chart1.AxisY.ResetScale()   'Chart1.AxisX.ResetScale()   'Chart1.RecalcScale()

 And iwith another Sub ('Clear')  called before running a 2nd call to the Sub 'Display' I have tried these   Chart1.ClearData(ClearDataFlag.Titles Or ClearDataFlag.AllData)   Chart1.DataBindings.Clear()

 However, all I get on the second call is "No Data Available" without a plot.

 

Also (a different issue) when implementing this;  'Chart1.AxisY.ForceZero = False The Y-axis still plots to zero ?

 

Any help much appreciated.

Jon 

[Frank]

I don't think I understand what you mean.

You are clearing the data, so you are getting "No Data Available". This is what it is supposed to do.

As for setting ForceZero, this only affects future updates of the Axis Scale. If Zero is already there nothing will happen. You need to set ForceZero before setting any data to the chart.

 

[jon_m]

 Francisco

Thanks for your help.

I found the problem to "No Data Available". Nothing to do with  ChartFX, sorry.... just that I had not instantiated a 'NEW' dataset on the next call of that sub. It nows works properly.

 I have, in the mean time, replaced y-axis scaling with .Min & .Max which also work properly. I take your point about ForceZero needing to be set prior data assignment. I would have had it wrong there.

Chart FX Lite is now working extremely well & fast, being able to flick through many charts quickly. Just wish it had an option for a secondary y-axis.

ThanksJon