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I’ve got an OhlcDataSeries<DateTime, double> and I’m trying to add a VerticalLineAnnotation by setting X1 = DateTime.UtcNow.AddDays(-2).
However, when the annotation is added, I get an InvalidCastException saying it can’t convert from DateTime to Int32.
Probably the reason why this happens is that you use the CategoryDateTimeAxis. It uses IndexRange as VisibleRange, not DateRange. So to place an annotation, you need to convert a data value to its index. Please take a look at the article on coordinate transformation here:
(see under the “CoordinateCalculators API when using CategoryDateTimeAxis” paragraph)
Also this thread may be helpful:
Hope this helps! Please feel free to comment if you have any questions,
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