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4 Charts in Repeater causes 100% CPU and Browser Dies.


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Posted

Hi

I wonder if anyone can help?

3 Charts in a Repeater works fine,

but when I add the 4th ( With out data its fine ) with data it maxs out the

CPU and the browser hangs.

Interestingly enougth the first 3 charts show fine, but when I scroll down

to the 4, this is when my browser hangs. ( one the action of scrolling down

the page to it)

I've tried this on another machine and it does the same.

Anyone any ideas?

My Information:

I am running XP Pro with .Net framework 1.1, The charts are on a c# aspx

page and the view is in .Net mode for each chart within my repeater.

Kind regards,

Jason

Weblogik Ltd.

Posted

Solved the problem, Its not the fact that we're using a repeater, I had a

value in my chart of -1 rather then a whole number.

Is this possibly a bug?

Kind regards,

Jason.

"Jason Clark" <jason.clark@weblogik.biz> wrote in message

news:OV60I6lvDHA.3512@WEBSERVER1...

> Hi

> I wonder if anyone can help?

>

> 3 Charts in a Repeater works fine,

> but when I add the 4th ( With out data its fine ) with data it maxs out

the

> CPU and the browser hangs.

>

> Interestingly enougth the first 3 charts show fine, but when I scroll down

> to the 4, this is when my browser hangs. ( one the action of scrolling

down

> the page to it)

>

> I've tried this on another machine and it does the same.

>

> Anyone any ideas?

>

> My Information:

> I am running XP Pro with .Net framework 1.1, The charts are on a c# aspx

> page and the view is in .Net mode for each chart within my repeater.

>

> Kind regards,

> Jason

>

> Weblogik Ltd.

>

>

Posted

In brief below dataValue was minus one. ( I used this to indicate a data

error in my database) hence chart fx through a wobblely and maxed out CPU.

Series1 = new System.Collections.ArrayList();

Labels = new System.Collections.ArrayList();

AllPoints = new System.Collections.ArrayList();

while (DataReader.Read())

{

Labels.Add ( DataReader["SITE_NAME"].ToString () );

Series1.Add( double.Parse (DataReader["dataValue"].ToString ()));

}

AllPoints.Add (Series1);

lstProvider = new SoftwareFX.ChartFX.Data.ListProvider(AllPoints);

Chart1.DataSourceSettings.DataSource = lstProvider;

Chart1.DataBind();

Posted

Hmm. That's odd. A value of -1 should be ok. Where ALL values -1 ? if so,

what could have happened is that we were unable to calculate a valid scale

( MIN/MAX ), this condition can be easily tested by comparing Min and Max

right after passing the data, however, I checked and in Chart FX 6.2 we

check for this condition.

Which version are you using ?

--

FP

Software FX, Inc.

Posted

I think all values where -1, Version 6.0

Now testing 6.2 - Thanks.

"SoftwareFX Support" <support@softwarefx.com> wrote in message

news:jeV72nywDHA.3072@WEBSERVER1...

> Hmm. That's odd. A value of -1 should be ok. Where ALL values -1 ? if so,

> what could have happened is that we were unable to calculate a valid scale

> ( MIN/MAX ), this condition can be easily tested by comparing Min and Max

> right after passing the data, however, I checked and in Chart FX 6.2 we

> check for this condition.

>

> Which version are you using ?

>

> --

> FP

> Software FX, Inc.

>

>

Posted

Jason,

I find that 5 charts is the magic number. CPU usages jumps (but doesn't

max), and any other charts show as a broken image or applet shows a 'Failed

to download Chart. Timeout' error message. Is this a known limitation?

Stephen

"Jason Clark" <jason.clark@weblogik.biz> wrote in message

news:OV60I6lvDHA.3512@WEBSERVER1...

> Hi

> I wonder if anyone can help?

>

> 3 Charts in a Repeater works fine,

> but when I add the 4th ( With out data its fine ) with data it maxs out

the

> CPU and the browser hangs.

>

> Interestingly enougth the first 3 charts show fine, but when I scroll down

> to the 4, this is when my browser hangs. ( one the action of scrolling

down

> the page to it)

>

> I've tried this on another machine and it does the same.

>

> Anyone any ideas?

>

> My Information:

> I am running XP Pro with .Net framework 1.1, The charts are on a c# aspx

> page and the view is in .Net mode for each chart within my repeater.

>

> Kind regards,

> Jason

>

> Weblogik Ltd.

>

>

Posted

If you read further on Jason's thread, you will se that the problem has

nothing to do with the number of charts in the repeater.

Jason said:

"Solved the problem, Its not the fact that we're using a repeater, I had a

value in my chart of -1 rather then a whole number.

Is this possibly a bug?"

The problem was that he was setting ALL the values to -1 and therefore the

chart ended up without a Y-Axis scale (Min = Max).

Maybe you are experiencing a different problem. Do you have a repro case ?

--

FP

Software FX, Inc.

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