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Tooltip Manager RadChart

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ToolTip
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Colin Wright
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Colin Wright asked on 08 May 2008, 07:37 AM
I am trying to follow the RadChart Example http://www.telerik.com/demos/aspnet/prometheus/Controls/Examples/Integration/ChartAndToolTip/DefaultCS.aspx?product=chart

about adding a tooltip to series.

However my chart is a content page within a master page site and I have added my script manager to the master page. When the page with the chart loads I get an error

The control with ID 'RadToolTipManager1RTMPanel' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.

Any help greatly appreciated

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Svetlina Anati
Telerik team
answered on 09 May 2008, 02:12 PM
Hi Colin,

I am not quite sure why the ScriptManager is not found when at the same time it is declared.

I tried to reproduce your problem but unfortunately to no avail.

Please, open a new support ticket and send a small, running project which reproduces the problem. Once I get ti, I will do my best to help.

All the best,
Svetlina
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Dave Friedel
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answered on 11 Jan 2010, 09:55 PM
This occurs on websites with heavy load - which is why you (Telerik) cannot reproduce it easily.  I have seen this happen on a few of my client sites and unfortunately it seems that some controls may not be suitable for heavy loaded pages (aka home pages)

I have seen issues with
  • Chart
  • FormDecorator

It especially occurs if you create the ScriptManager in memory and add it to the page dynamically but once again under heavy load - 50+ concurrent requests

D.
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Svetlina Anati
Telerik team
answered on 14 Jan 2010, 01:20 PM
Hello Dave,

I understand that dealing with many requests and having a lot of controls might cause problems but I am afraid that there is nothing we can do without examining a particular case. That is why we need to have a reproduction demo locally or we can try to investigate the issue online if you can provide a live url. Another thing I can recommend is to always update to the latest possible version because we are continuously working on improving performance and integration of RadControls.

Once we have a setup we can research we will analyze and debug it and we will do our best to solve the problem.


Sincerely yours,
Svetlina
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Dave Friedel
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answered on 29 Mar 2010, 10:18 PM
I cannot provide a sample for you to test locally - it occurs in my platform which builds pages dynamically about once or twice a week out of a couple million page requests.  I see the error appear occasionally in my clients error logs (I use the Application Blocks Error Management - which is how I see the error)  Universally if the load is heavy it appears a couple times (3 or 4 times) a week.

I am surprised you do not get it occasionally in your main homepage, as you must have the load.  Do you record the Page_Init errors or only do a try catch with no logging?
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Tsvetie
Telerik team
answered on 02 Apr 2010, 12:19 PM
Hi Dave Friedel,
We do record errors and all demos with RadChart are hosted on one server. The load on that server should be sufficient for the error to occur, provided this is the only reason as you assume. However, we do not have logs of such an error. Is it possible that you get the error, when you recycle your web site? You can check, if you have enabled output caching for some of your pages/user controls - this could be causing the problem as well.

Sincerely yours,
Tsvetie
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Colin Wright
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Svetlina Anati
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Dave Friedel
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Tsvetie
Telerik team
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