Zooming without viewstate?

[Chris]

Hello,

I have 3 databound charts loaded on a page that load relatively fast as I have viewstate disabled for them.  I really love the new zooming feature and would like to turn it on for the charts, however I can't seem to get the plot area to render my data with zooming enabled unless viewstate is also enabled. 

For some reason the viewstate for these charts is massive (several hundred KBytes per chart), so I take a massive perf hit on the download and CPU processing on the web server with VS turned on.

Is ViewState absolutely needed for the Zooming/Scrolling functionality? (or is there anything clever I could implement to workaround?)  If it is needed, are there any pointers on how I can shrink the size of my viewstate blobs for the charts?

Thanks!

Chris

[Giuseppe]

Hi Chris,

The zooming and scrolling feature of RadChart cannot operate with ViewState disabled at this point. As for the optimization of the latter -- unfortunately we cannot suggest you a clever way to reduce the ViewState as its size is basically related to the serialized settings you have applied to your chart object.


Sincerely yours,
Manuel
the Telerik team

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[Chris]

Thanks Manuel-

It sounds like it might be on the roadmap for a future release to not have this dependency?  I'm wondering if I have a ton of serialized settings configured that I don't need since the charts work completely as I would expect with viewstate disabled.  I'm not really sure where to look though (do you have a few examples of "serialized settings"?). 

Also, does the amount of data I'm pushing into the charts affect the size of the viewstate in any way?  That might explain it as I'm pushing thousands of data points into the charts.

Thanks for the prompt response!

Chris

[Giuseppe]

Hi Chris,

We will research the option to enable the zooming / scrolling feature with disabled ViewState and we will probably add it for one of the next versions of the control.

As for the ViewState -- when it is enabled, the amount of data affects its size as the data points are serialized into it as well.


Regards,
Manuel
the Telerik team

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[Matthew]

Can zoom now work without viewstate?

[Giuseppe]

Hi Matthew,

Unfortunately the chart control still does not support zooming / scrolling with disabled viewstate.

Sorry for the inconvenience.


All the best,
Manuel
the Telerik team

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