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| Author | Forum: PowerWEB File Upload for ASP.NET Topic: File Upload Control Hangs |
| anuragj From: Congers, NY USA Posts: 7 Member Since: 05/28/10 |
posted May 28, 2010 9:32 AM We've recently deployed an app that uses the file upload control and we've a complaint from a user that the control hangs. The user is able to browse and select files but when they hit the "open" button the progress panel appears but it doesn't report any progress. These are small files (around 100k) and the user has a broadband connection, and they are using IE8 on Windows 7. We have not been able to recreate the problem on our side. From our IIS log we see that there are constant postbacks to the page about every second, as if the application is stuck in an infinite loop. Is there a known fix to this problem? Or is there some diagnositic information we need to get out of the user before you can continue? |
K M Drake From: Utica, NY USA Posts: 3406 Member Since: 07/14/00 |
posted June 1, 2010 9:00 AM Hi, The control performs callbacks over a second connection to relay progress information to the browser. The frequency of these callbacks depends on the value of the UploadManager.PollingFrequency property, which defaults to one second. Is the user a client connecting to your server, or someone who hosts a copy of your application? In other words, is this a problem with an isolated client of your server (indicating a client-side problem), or a problem with all clients connecting to an alternate server (indicating a server-side problem)? Do the transfers even start? Also, are you sure it is hanging, and not just failing to report progress? Thanks, -ken |
| anuragj From: Congers, NY USA Posts: 7 Member Since: 05/28/10 |
posted June 1, 2010 9:37 AM Hi, This is a client side problem. We have the application running on a server and we have several users but this is the only user that is experiencing any problems. I don't know if the transfers are starting or not, after the user selects a file the progress panel appears but then nothing happens. I don't believe that this is a matter of failing to report progress because these are small files that typically take less than a second to finish. The user was waiting several minutes and nothing was happenening. We have event handlers for the UploadComplete event and the FileUploadFailed event and neither are being reached. |
| K M Drake From: Utica, NY USA Posts: 3406 Member Since: 07/14/00 |
posted June 2, 2010 9:33 AM Hi, Does the client have Flash installed? If so, what version is the client using? (I assume you are using UploadType.Flash or UploadType.Autodetect). Is the FileUploadFailed event firing? Would you be able to perform a test using UploadType.IFrame? If so, please do so and report what happens. IFrame provides much better error messages than Flash, and may better indicate what the problem is. Thanks, -ken |
| anuragj From: Congers, NY USA Posts: 7 Member Since: 05/28/10 |
posted June 8, 2010 10:38 AM Hi, Switching the uploadtype to iframe solved this problem for us. We are just going to adjust the uploadtype based on the user. Thanks. |
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