Error ASP.Net : The Temp Directory in Chart Handler Configuration is Not Accessible

Error ASP.Net : The Temp Directory in Chart Handler Configuration is Not Accessible

Error ASP.Net : The Temp Directory in Chart Handler Configuration is Not Accessible . If you build a web application with Chart control fo... 16.09.00

Error ASP.Net : The Temp Directory in Chart Handler Configuration is Not Accessible. If you build a web application with Chart control for ASP.NET 4.0 and deploy the site to web server.  You might get following error on the live site:

The temp directory in chart handler configuration is not accessible

To resolve this, first go to web.config and find the ChartImage directory in appsettings.

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

The go to the temp chart image directory and grant read and write permission to IIS

Stack Trace:

I manually added TempImageFiles folder under c:, but still get the same error.
An exception occurred: System.IO.DirectoryNotFoundException: Invalid temp directory in chart handler
configuration [c:\TempImageFiles]. at System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings.Inspect() at
System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings.ParseParams(String parameters) at
System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings..ctor(String parameters) at
System.Web.UI.DataVisualization.Charting.ChartHttpHandler.InitializeParameters() at
System.Web.UI.DataVisualization.Charting.ChartHttpHandler.EnsureInitialized(Boolean hardCheck) at
System.Web.UI.DataVisualization.Charting.Chart.GetImageStorageMode() at
System.Web.UI.DataVisualization.Charting.Chart.Render(HtmlTextWriter writer) at
ChartPart.ChartPartWebPart.Render(HtmlTextWriter writer)

Solve : make sure that you deployed and activated the MSCHartControls feature on your webapplication, then check the web apps web.config file so that the following line exists: 

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

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