asp.net:Invalid temp directory in chart handler configuration [c:\TempImageFiles\]

Question

I am getting this error Invalid temp directory in chart handler configuration [c:\\TempImageFiles\\]. While running my code.

Intially I was getting

Answer 1

You need to use a temporary directory that is within the folder hierarchy of your web application. In Windows Azure, you don't have access to c:\TempImages, so that is not going to work.

I created a quick sample of ASP.Net Charts working in Windows Azure here: http://code.msdn.microsoft.com/azurecharts

You can still use file storage for the temporary images:

If you don't want to download the sample, here are the steps to get it working:

1. In your Solution, create a folder (called TempImages, for example).
2. Add a file (temp.txt, or whatever) to this folder. The dev tools don't seem to publish empty directories.

3. Set the image location of your chart to:

   ImageLocation="~/TempImages/ChartPic_#SEQ(300,3)"

4. Add the following to appSettings in your web.config :

5. Make sure the following is in system.web/assemblies :

6. Make sure the following is in system.web/httpHandlers :
   

7. Make sure the following is in system.webServer/handlers
   

The code I uploaded to code.msdn.com should suffice as an example.