Chart-API: Man kann VARCHAR-Spalte als Wertespalte festlegen
Description
Initial behaviour:
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Man kann in den Eigenschaften der Charts die VT festlegen.
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Real behaviour:
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Ich kann als Wertespalte eine Spalte auswählen die keinen
numerischen Typ hat. Dies führt zur Laufzeit zu einer
Exception.
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Expected behaviour:
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Es sollte unterbunden werden, dass man Spalten auswählt,
die keine numerischen Werte enthalten.
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Comment:
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Environment
Activity
Provided comments should give explanation why this "bug" wont be fixed.
SnapshotDiagram example screenshot added
Also consider date/time values beside the mentioned numeric limitation.
This is the desired behavior.
There could be the situation the user wants to create a kind of snapshot diagram with string labeling on both axes.
Like the exceptions says "No matching axis/data initializer type was found" but if the user wants to create a custom data initializer he can do so.
Hence String value axes must be accessible.