topic Re: Print function and incorrect json in ArcGIS API for Silverlight Questions

Print function and incorrect json

ChrisBradberry — Tue, 27 Nov 2012 21:01:06 GMT

I am working with the 10.1 print task and I get some odd results. The problem is that when I send maps to the server, the returned output would be a map that I had previously sent. It is as if it cycles through all the previous maps -- I had to keep clicking the export map button until I got to the correct output.

I checked the json with fiddler, and it is for the current display on the screen. But when the pdf shows up, it is a previous map. Is there a way to clear out the old json before starting the new map?

Does anybody have any ideas?

I am using Silverlight 4, api 3.0, ArcGIS 10.1 and VS 2010

Thanks, Chris

Re: Print function and incorrect json

JohanCarlsson — Thu, 29 Nov 2012 12:02:04 GMT

Have you tried to disable client caching?
http://resources.arcgis.com/en/help/silverlight-api/apiref/ESRI.ArcGIS.Client.Printing~ESRI.ArcGIS.Client.Printing.PrintTask~DisableClientCaching.html

Re: Print function and incorrect json

ChrisBradberry — Thu, 29 Nov 2012 19:15:00 GMT

Johan,

Yes, I disabled the client caching. I have found that it only seems to do this from my computer and not the clients, both in debugging and production versions.

Chris

Re: Print function and incorrect json

JohanCarlsson — Fri, 30 Nov 2012 05:21:22 GMT

Johan,

Yes, I disabled the client caching. I have found that it only seems to do this from my computer and not the clients, both in debugging and production versions.

Chris

Do you get the same results if you try a local print, i.e. remove your url to the print task?

Re: Print function and incorrect json

ChrisBradberry — Fri, 30 Nov 2012 14:41:46 GMT

Johan,

I tried it this morning and it worked as expected. I need to put this aside for the time being. Thanks for the help.

Re: Print function and incorrect json

KurtWille — Fri, 04 Jan 2013 13:47:39 GMT

I found that this solution overcame the client cache problem:

private void printTask_PrintCompleted(object sender, PrintEventArgs e)
{
//open exported map in new browser window
Random random = new Random();
Uri u = new Uri(e.PrintResult.Url + "?Unused=" + random.Next().ToString());
System.Windows.Browser.HtmlPage.Window.Navigate(u, "_blank");
}