Comments on: WPF & Silverlight Charting: A Logarithmic Axis

By: Kyle

Kyle — Tue, 02 Feb 2010 21:26:47 +0000

One more hint. The polyline also does not show up when the control is rendered using RenderTargetBitmap; I am attempting to render the control into an image file without first having to actually have a Window associated with the graph.

By: Kyle

Kyle — Tue, 02 Feb 2010 21:23:45 +0000

This failure to see the polyline is not specific to the logarithmic axis. I have not figured this out yet; it sure would be nice to know how to get this to work.

By: cplotts

cplotts — Thu, 28 Jan 2010 14:36:00 +0000

Kyle: I would also contact David Anson about this issue. Or ... are you only noticing it with my logarithmic axis implementation?

By: cplotts

cplotts — Thu, 28 Jan 2010 14:21:25 +0000

Kyle: I have never tried that. Interesting.

Very interesting, in fact. As we currently have a bug where the polyline is not showing up in one of our graphs being printed.

I will keep your issue in mind when I tackle our own issue, and if I learn anything that might help you … I will comment back here. Please do the same on your end.

By: Kyle

Kyle — Tue, 26 Jan 2010 18:08:59 +0000

I was wondering if you have had any luck getting a chart to print using a FixedDocument? My experience in attempting to do so shows that the X and Y axis print, but not the data points or polyline connecting them. I am not talking about printing the chart as a ‘visual’ having already been rendered within a Window, but directly created and placed on a FixedDocument (well in a FixedPage and Canvas but you get the idea).

This is a mystery to me and I thought you might have tried this already?

By: cplotts

cplotts — Thu, 21 Jan 2010 14:05:12 +0000

@Kyle

As I have mentioned in a private email to you, I do get this error, but it doesn’t seem to affect things … and if I rebuild … the Visual Studio designer surface does come up.

What is interesting is that I don’t get this error in Blend … which makes me less concerned about it really. The Visual Studio designer definitely has its issues. I wish I hadn’t stripped out the WPF 4 project now. It would be interesting to see if that designer error comes up in the new Visual Studio 2010 designer. I would speculate that it wouldn’t … as they have seriously worked on the Visual Studio designer for 2010. If anyone goes to the length of finding this out … let me know.

(Note: this designer error only happens with the version of the source code above … that is an extension of the toolkit … and not with the local edit of the toolkit.)

By: Kyle

Kyle — Wed, 20 Jan 2010 22:27:35 +0000

When opening the solution using VisualStudio 2008 I see two errors. One of which is:
A value of type ‘LogarithmicAxis’ cannot be added to a collection or dictionary of type ‘Collection`1′.
C:\DataVisualizationDemos\Silverlight\VisibilityTestHarness.xaml 202 5 DataVisualizationDemosWPF

The demo seems to work all the same however I get the same error in my own project after I have put this source in my project … and attempt to utilize the logarithmic axis in the xaml file.

Do you know why this is happening and how to fix it?

The Visual Studio designer cannot render the Window when this error occurs.

Thanks!

By: cplotts

cplotts — Tue, 19 Jan 2010 15:33:01 +0000

I have just updated this blog post to include the source code that shows the logarithmic axis as an extension of the toolkit (versus a local edit).

See the last postscript above.

By: cplotts

cplotts — Mon, 26 Oct 2009 15:30:10 +0000

Very nice! Thanks for sharing!

By: Srikanth

Srikanth — Mon, 26 Oct 2009 15:07:13 +0000

I understand. Here is how my latest implementation looks:

http://img24.imageshack.us/img24/3817/logchart.jpg