Using Chart HTTP Handler

Alex Gorev's Weblog — Mon, 12 Jan 2009 22:56:03 GMT

Delian Tchoparinov just posted on his blog about chart image rendering using Chart HTTP Handlers. This

Image Not Found

mb35412 — Fri, 03 Apr 2009 19:31:03 GMT

The chart tool is a great application, when it works. The fact that the image not found problem is one of the most popular topics tells me that many people are having the same problem, and that it isn't a single issue.

We have it working fine on the test box but not on the production box. We checked all the settings (web.config, temporary asp.net folder, iis settings) are exactly the same.

We tried the deleteAfterServicing=false option and saw that the file is being created but it is not able to get it on the web page. It gives a "image not found" error.

The current appSetting that we are using is as follows:

</appSettings>

We also tried running process monitor on each of these servers. We noticed that on the test server, there are write and read requests generated for the .png file, but on the production, it only generates the write requests. We do not see any read requests.

Also, the process that generates these requests are different on each of these servers. The test server requests are generated by the aspnet_wp.exe whereas the production server requests are generated by w3wp.exe..

We are not sure if that is a problem and if so, how can we change the process generating the requests. Also, why would the read requests not get generated at all.

Handling chart generated images using Chart Http Handler

Using Chart HTTP Handler

Image Not Found