how to render chart control in HTTPHANDLER RSS

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  Sagar1304

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  how to render chart control in HTTPHANDLER

  Dec 22, 2011 03:20 PM|LINK

  Hello all,

  In my aspx page i am using jquery from which i am calling httphandler.
  in this httphandler, i am rendering chart control by below mentioned code.

   HtmlTextWriter _HtmlTextWriter = new HtmlTextWriter(_StringWriter);
  _Chart1.RenderControl(_HtmlTextWriter);
  
  and return string in result.

  but in aspx page getting error of 404 not found for image url.

  Help me to solve this.!!

  Thanks,
  Sagar Joshi

  • Moved by XIII on Dec 23, 2011 03:03 PM
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  smirnov

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  Re: how to render chart control in HTTPHANDLER

  Dec 22, 2011 06:50 PM|LINK

  Right click in the browser and copy image URL, paste it in the address bar and see what happens. 

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  Sagar1304

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 04:22 AM|LINK

  Hi smirnov,

  i have tried that.
  it shows url for the image of chart like below:
  http://localhost:3674/ChartImg.axd?i=chart_0_1.png&g=d0acb1010f0e4c15834fac39bd517731

  but it shows same error "404 Not Found".

  Is there aby workaround for this?

  Thanks,
  Sagar Joshi
  
  

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  smirnov

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 08:35 AM|LINK

  Please check if handler is configured correctly in the web.config

  <add path="ChartImg.axd"
  verb="GET,HEAD,POST" 
  type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
  validate="false" />

  • Edited by smirnov on Dec 23, 2011 08:36 AM
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  Sagar1304

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 09:03 AM|LINK

  Thanks smirnov

  
  below is httphandler

  <handlers>
        <remove name="ChartImageHandler" />
        <add name="ChartImageHandler" preCondition="integratedMode" verb="GET,HEAD,POST"
         path="ChartImg.axd" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"   />
      </handlers>

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  smirnov

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 09:17 AM|LINK

  Can it be because of this problem?

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  Sagar1304

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 09:44 AM|LINK

  Hey smirnov,

  I solved this by implementing IRequiresSessionState.

  and now its rendering image of chart properly.

  Regards,
  Sagar Joshi

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  Sagar1304

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  Re: how to render chart control in HTTPHANDLER

  Dec 23, 2011 03:00 PM|LINK

  Hey smirnov,

  i have just noted that after implementing that interface now it will not fullfill further request untill HTTPHANDLER response has received.
  
  is there any workaround to solve this?
  
  Regards,
  Sagar Joshi