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Editorial Team
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Asked: 2026-05-20T07:45:03+00:00

I’ve added the new Chart control to my project and it works well. I’ve

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I’ve added the new Chart control to my project and it works well. I’ve set the

<add key="ChartImageHandler" value="storage=memory;timeout=20;" />

<handlers>
  <add name="ChartImg" verb="*" path="ChartImg.axd"  type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"  />
</handlers>

Everything is fine as long as I use the “/host/Poll.aspx” path in my browser. Things break when switching over to the rewritten URL “host/poll/”. I am getting the “System.Web.HttpException was unhandled by user code
Message=Error executing child request for ChartImg.axd.” exception.

Any ideas how to fix it? Thank you very much!

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1 Answer

  1. Editorial Team

    I cant actually try this at the moment but how about “~/ChartImg.axd”

    Failing that try using image locations

    <add key="ChartImageHandler" value="Storage=file; Timeout=20; Url=~/Temp/Charting/;"/>

    Edit: And update your chart html

    <asp:Chart ID="chrt1" runat="server" Width="550px" Height="400px" 
    SuppressExceptions="True" ImageStorageMode="UseImageLocation"
    ImageLocation="~/Temp/Charting/ChartPic_#SEQ(1000,30)">

    And make sure the directory you are writing to exists. I normally do this on app start in the global

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