The version of Spire.XLS that we have (Version: 7.11.13.7040 / Runtime: v4.0.30319) does not have the capability to have a data label value other than the plot point value on a line chart. If it is capable of that, we haven't been able to figure it out. Does the newer version of Spire.XLS support this excel feature?
For instance, a plot point could have a value of, say, "30". The point on the chart shows correctly, but the data label will also show a value of "30". In excel you can have a different Data Label value display even if the plot point is "30". So we'd like to do something along the lines of:
plot point = 30
data label = "today"
We are able to do this in excel, but as soon as Spire.XLS reads the excel file, it converts the data label to also be "30".
Thanks!