I also have same problem when using LineSeries with CategoryAxis and LinearAxis. It seem that when using LineSeries, X & Y axis must be in double. My solution is to add dummy field in double into the model Example Class DateValue { double Value = 10.5, 30.7,10.3 string MonthName = "Jan", "Feb", "Mar" double dummyField = 0,1,2 (must start with 0) }
then in Category Axis, set LabelField to MonthName but in LineSeries, set DataFieldX = "dummyField"
It seem that when using LineSeries, X & Y axis must be in double.
My solution is to add dummy field in double into the model
Example
Class DateValue {
double Value = 10.5, 30.7,10.3
string MonthName = "Jan", "Feb", "Mar"
double dummyField = 0,1,2 (must start with 0)
}
then in Category Axis, set LabelField to MonthName but in LineSeries, set DataFieldX = "dummyField"