解决 ASP.NET Chart 控件出错 为 ChartImg.axd 执行子请求时出错

1. 修改web.Config

<add key="ChartImageHandler" value="storage=file;timeout=20;url=~/TempImages/;" />

将其中的 dir=c:\TempImages\ 的绝对路径 修改外 url=~/TempImages/ 相对路径  （前提条件：网站文件中必须包含 TempImages文件夹）

2. 修改

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

为

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

3. 修改

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

为：

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