Web Forms :: Chart, RenderControl, & System.NullReferenceException?

Feb 23, 2010

I need to get the html of a chart control built at runtime. When I call .RenderControl, I get System.NullReferenceException. What could the problem be? Is there another way to go about this (saving as image)? Below is my code.

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Private Sub TestString()
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STACK TRACE

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Here's how I set the tooltip:

[Code]....

Anyone else noticed this behaviour and have a work around?

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