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Editorial Team
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Asked: 2026-05-18T07:07:55+00:00

I have an VS2010 ASP.NET 4 web site app, to which I added the

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I have an VS2010 ASP.NET 4 web site app, to which I added the new Chart control.

When I deployed it to our web server, we get a” Internal Server Error 500.” message.

I noticed that the following lines were added to the web.config since the last release, related to the chart control:

  <system.web>
    <httpHandlers>
      <add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
       validate="false" />
    </httpHandlers>

If I remove this added code from the web.config, the site works–Except for the charting functionality.

How do I get the site and the chart page to work?

This is not an issue on IIS versions < 7.

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1 Answer

  1. Editorial Team

    Make sure you comment out the entry in the system.web section:

    <httpHandlers> 
<add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, 
System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" 
validate="false"/> 
</httpHandlers>

    And make sure the system.webserver section has the following:

    <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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