Hi,
We are using xamWebChart and adding Datapoints dynamically to it. We have to show Numeric Value in Y-Axis and Date Value in X-Axis. But we are having following issues:
1. We have to add dates by casting it to string (Hope it does not effect any thing)2. Only 4 Dates are shown in x-axis labels while there are hundred of date points, this makes chart less readable.3. We are adding tooltip to datapoints but it is not shown(If i convert the chart type to Scatter then it shows tooltip).4. It takes 3 to 4 seconds to add data points(I am using cht.RefreshEnabled this property too).
Can you help me to reolve these issues
Thanks
Graham is on vacation, so I'll answer these.
I don't think there's an event after LayoutUpdated which will be raised after rendering is completed. I also discussed this with Graham before he left, and he agreed - at this time, the control has passed all its UIElements to Silverlight to be rendered, and there's no way for the control to know when the graphics have been rendered to the screen.
The Service Release for NetAdvantage for Silverlight 2010.1 would include those charting performance fixes. However, those service releases are based on Silverlight 4.
Thanks Graham for this explaination,
First of all, Chart takes some time in randering after LayoutUpdated evnt has fired is there any event which fires after rendering is done. this can be observed in provided sample earlier (Please check the time taken after MessageBox displayed in LayoutUpdated event for chart. you can check this on vs 2008 with SL 3)
And secondly, 2010 v2 has some Performance fixes with respect to Charts but this is only supporting VS 2010. Is there any service pack for 2010 v1 to provide related fixes to VS 2008 (SL 3).
In 9.2, the LOB xamWebChart has a subset of the features of the DV xamWebChart. But the features that exist in both share the same code base, and the performance profile should be very similar, if not identical.
In 10.2 you also have access to the xamDataChart which is designed for high data volume scenarios which would assist in this instance.
What is the remaining issue you are working around? The time between the binding of the data and the display in the chart? When you are displaying large volumes of data in the XamWebChart, some delay in rendering is difficult to avoid as, in the end, Silverlight is being asked to draw too much geometry. The XamDataChart is better at managing and reducing unnecessary geometry to improve silverlight rendering performance.
I'll take another look at your sample and see if there is anything else I can recommend to speed up the render time.
Hi Graham,
I tried to test the solution with 2010 v 2 but unfortunately v2 is only available for SL 4 and VS 2010 while we are using VS 2008 with SL 3.
Can you help me in this regards (Should we leave this issue or there is some work around).
And can you tell me if there is any difference in Data Visualization » xamWebChart and Web Client » xamWebChart
The screenshot I attached is from the latest code, which should equate to the next volume release.