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Charting in DotNetNuke

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Chart (Obsolete)

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Fooberichu asked on 26 Feb 2008, 05:52 PM

I have the need to create some charts and display them in DotNetNuke and found that adding a Chart control to a module throws some errors (at this point, can't remember exactly, but some popups about cannot display image, do you want to view the stack trace).

What I ended up doing as a workaround is created an ASPX page in my dnn module that will handle some querystring values and then dynamically creates a RadChart control, populates the series and all that jazz, and then calls RadChart.Save(this.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg) (after appropriately clearing the headers and response stream and setting the content type to "image/jpeg"). The processor page is linked to an asp:Image control on the dnn module itself as the image url so it processes and shows up dandy.

What I'm wondering is if this would be "correct" usage for such a scenario or if there is a "better" way to get it working with DNN.

14 Answers, 1 is accepted

answered on 28 Nov 2008, 08:27 PM

I have this issue with DNN 4.9 also.

In the httpHandlers section:

<add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI,

Version=2008.2.1001.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />

The version is correct.

As per this forum I tried:

<add path=",,/,,/ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI,

Version=2008.2.1001.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />

but then it doesn't think the handler has been added to the web.config.

What else can I try?

answered on 01 Dec 2008, 03:30 PM

Hi there,

@ Bruce -- you should not be changing the path in the web.config file like this, we belive Farooq meant he changed the RadChart.HttpHandlerUrl property.

Anyway, we believe the problem is most likely triggered by the "Use Friendly Urls" feature of DNN. In this scenario you can use the RadChart.HttpHandlerUrl property to manually set the path of the ChartHttpHandler that is required for the correct operation of the chart control. We would suggest you to set it from code behind like this and the chart should work as expected:

    
            RadChart1.HttpHandlerUrl = ResolveUrl("ChartImage.axd")

Greetings,
Manuel
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 04 Sep 2009, 10:10 AM

Hi There,
I have licensed telerik controls (Telerik.Web.UI version 2009.1.527.20). I am trying to parepare chart (StackedBar100)

using telerik but its not working properly. When I check this at on devlopement machine its working but when I check this at testing server (where we publish our build) it shows following error:
Error loading RadChart image.
You may also wish to check the ASP.NET Trace for further details.
Display stack trace?

I tried to debug code at the testing server but again it works fine when I debug that. The problem is only with the build. No I have to do something extra on the testing server so that it can work fine.

I have added below lines in web.config file under httpHandler:

add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Version=2009.1.527.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />

I tried "chartCompleteReports.HttpHandlerUrl = ResolveUrl("ChartImage.axd"); " also in the page_load & in method where I have written the code for binding the chart, but still its not working.

Just to let you know that we are working on web application on MS Visual Studio 2008 with dotnet framework 3.5 and language C#.net with asp.net using MS SQL SERVER 2008.

Please let me know in case of any issue/concern. I will appreicate if you will reply ASAP.

Thanks!