Adding Large Numbers To Chart
I’m having some trouble adding large (8+ digit) numbers to the Y-axis of a chart at runtime. The Y-axis should display numbers (double data type) and the x-axis should display strings.
When I add a number under 8 digits (using Points.AddXY, Points.AddY, or Points.Add) I get an error saying this:
The odd thing is that the error doesn’t occur when I can the Points.Add method, but when I call Chart.Update. I can add all the data fine, but when I call update, it gives me the above error.
It seems like its treating the data as an OLE Automation Date, but I can’t imagine why. I set the Series. XValueType to String and Series. YValueType to Double at runtime for each series before adding the data.
Any ideas?
When I add a number under 8 digits (using Points.AddXY, Points.AddY, or Points.Add) I get an error saying this:
There should be nothing date-related going on with the chart, only number values. This error occurs with and with decimals in the value I’m trying to add.
A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll
Additional information: The added or subtracted value results in an un-representable DateTime.’
The odd thing is that the error doesn’t occur when I can the Points.Add method, but when I call Chart.Update. I can add all the data fine, but when I call update, it gives me the above error.
It seems like its treating the data as an OLE Automation Date, but I can’t imagine why. I set the Series. XValueType to String and Series. YValueType to Double at runtime for each series before adding the data.
Any ideas?
a first chance exception is not necessarily an error. it is a test on a variable which is controled by a try-catch block and where the exception was caught and handled by the software.
is there enough space at left of the y-axis to display a 8+ number? you also may consider that a floating point number rarely matches exactly to the number displayed but that there is mostly a rounding difference, for example the number 123456.78 might have the internal value 123456.7799998... where at the 14th or 15th decimal digit there is a significant difference. if the chart library uses float type the precision reduces to 6 or 7 digits. all that could lead to range errors if not configured rightly and the error message could be misleading in those cases.
Sara
is there enough space at left of the y-axis to display a 8+ number? you also may consider that a floating point number rarely matches exactly to the number displayed but that there is mostly a rounding difference, for example the number 123456.78 might have the internal value 123456.7799998... where at the 14th or 15th decimal digit there is a significant difference. if the chart library uses float type the precision reduces to 6 or 7 digits. all that could lead to range errors if not configured rightly and the error message could be misleading in those cases.
Sara
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I found the solution before anyone else had any idea what it was. It was a mistake on my end, I had done something wrong and not fixed it, then forgotten about it.
make sure u have no datetime type under any circumstance in your chart.