Thanks everyone for the info, it has been a large help. I ended up modifying the webcharts3d.xml file so that the timeout is longer, that seems to solve the short term problem. The user can now print images as well as view them up to 2 minutes after they are created. For future pages, I will probably do what Brooks is suggesting and save off the image so it is always around (atleast until I no longer need it). Thanks again everybody.
> Mike: > > Here a trick I developed that might help you. I needed to create a pie > chart showing the results of an on-line poll. I used Macromedia Pollster > to create and maintain the polls. Pollster uses a Flash user interface, > but my client want an HTML equivalent. So I used an HTML form to collect > the data and cfchart to display it. I ran into the same problem with the > chart image expiring. Also, the site is heavily cached. The solution that > I came up with is a little clunky but it works. > > Use cfsavecontent to capture the output of the cfgraph call. > Parse the cfsavecontent output and recover the image file name that was > created with cfgraph. It looks something like > '/CFIDE/GraphData.cfm?graphCache=wc50&graphID=Images&id="Images_123456789"'. > Once I have the image file name and location, I made a copy of the image > in my cache directory with cffile. Pollster uses UUIDs to id the polls, so > I named them image "cache/UUID.png". > I go through the above logic whenever someone takes the poll, thereby > refreshing the image. > Lastly, to force the browser to refresh the image I append the vote count > as a URL parameter in the image statement: <img > src="cache/UUID.png?total=#totalVotes#"/> > > This seems to solve the problem of the expiring image and allows me keep > the site cached. You can see the browser side of the code in action at > http://www.frbatlanta.org/. I generated a png but it will work with jpg > (or gif). > > Sincerely, > > Brooks Wilson > 640K ought to be enough for anybody. - Bill Gates (1981) > > > > > Federal Reserve Bank of Atlanta · 1000 Peachtree Street, N.E. · Atlanta > Georgia 30309-4470 > 404.498.8178 · fax 404.498.8239 · [EMAIL PROTECTED] > > > > > > "Ajas Mohammed" <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > 04/22/2008 10:52 AM > Please respond to > discussion@acfug.org > > > To > discussion@acfug.org > cc > > Subject > Re: [ACFUG Discuss] CFChart and printing > > > > > > > Hi, > > Try this > > I guess you need to increase the timeout value. The charts/images are > cached and the timeout value says how long to cache the chart/images. > > go to cf install path\lib\webcharts.3d.xml > > look for the code below at the top > <?xml version="1.0" encoding="UTF-8"?> > <server image="PNG" cache="Memory" minTimeout="5000" maxTimeout="30000" > so on................. > > time is in millisecs > > we had same issue and setting timeout value fixed the issue. > > Hope it helps. > > Try it out. > > -- > <Ajas Mohammed /> > http://ajashadi.blogspot.com > No matter what, find a way. Because thats what winners do. > You can't improve what you don't measure. > Quality is never an accident; it is always the result of high intention, > sincere effort, intelligent direction and skillful execution; it > represents the wise choice of many alternatives. > "Live as if you were to die tomorrow. Learn as if you were to live > forever." > > > On 4/21/08, Mike Staver <[EMAIL PROTECTED]> wrote: > An application I'm working on uses the CFChart tag to generate a bar graph > based on a query. The graph looks great on the screen. This graph is > inside a loop, and the graph gets generated approximately 1 to 6 times in > most cases. When the user tries to print the screen, some of the images > print and some don't. When the system really starts acting up, not a > single image will print. The message being displayed in the images place > on the print out is "Image Expired", etc. The standard message when you > hit a back button to view a page without refreshing the page. Some other > info to note: > > 1) This webserver is NOT clustered. > 2) ColdFusion version MX 7.0.2. > 3) The cfchart tag is generating a jpeg image. > 4) The browser in question is IE 7. > 5) The webserver is IIS 6 on Windows 2003, using SSL. > 6) The user is immediately trying to print the page, not letting it sit > for more than 10 seconds max. > 7) The site is not under any kind of heavy load. > 8) I don't immediately have access to IIS or ColdFusion logs. > > All the research I've done points to the problem of having a clustered > site, which does not fit my case here. Has anybody else had to deal with > this issue before? > > > ------------------------------------------------------------- > Annual Sponsor FigLeaf Software - http://www.figleaf.com > > To unsubscribe from this list, manage your profile @ > http://www.acfug.org?fa=login.edituserform > > For more info, see http://www.acfug.org/mailinglists > Archive @ http://www.mail-archive.com/discussion%40acfug.org/ > List hosted by http://www.fusionlink.com > ------------------------------------ > > > > > > > > ------------------------------------------------------------- > Annual Sponsor - Figleaf Software > > To unsubscribe from this list, manage your profile @ > http://www.acfug.org?fa=login.edituserform > > For more info, see http://www.acfug.org/mailinglists > Archive @ http://www.mail-archive.com/discussion%40acfug.org/ > List hosted by FusionLink > ------------------------------------------------------------- > ------------------------------------------------------------- Annual Sponsor FigLeaf Software - http://www.figleaf.com To unsubscribe from this list, manage your profile @ http://www.acfug.org?fa=login.edituserform For more info, see http://www.acfug.org/mailinglists Archive @ http://www.mail-archive.com/discussion%40acfug.org/ List hosted by http://www.fusionlink.com -------------------------------------------------------------
