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 :

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

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

   <add assembly="System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

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

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

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

Answer 2

Just create a folder with name 'TempImageFiles' in C drive.

Answer 3

I had the same issue, my problem was my provider had special folders with write rights, so I changed the TempImagesFile folder to their default folder and it worked.

In my case the folder with write rights was called upload

web.config edits:

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

Hope this can help other too ;)

Answer 4

try to add this key to your web.config

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

instead of the default one:

<add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;" />

Answer 5

Check out this answer on the Windows Azure forum: http://social.msdn.microsoft.com/Forums/en-US/MSWinWebChart/thread/92238582-9445-4d15-a5a7-5f24fd4bf646/.

Answer 6

Update your app setting to this and see if that fixes your problem

 <appSettings>
    <add key="ChartImageHandler" value="storage=file;timeout=20;deleteAfterServicing=false;privateImages=false" />
    <add key="ChartImageHandler" value="storage=memory;deleteAfterServicing=true;"/>
  </appSettings>