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| Author | Forum: PowerTCP FTP for .NET Topic: FTP Progress Indication with ASP.NET |
| psved From: austin, TX USA Posts: 3 Member Since: 07/13/02 |
posted July 14, 2002 5:00 PM anybody has any luck with showing ftp file progress indication with asp.net? I should mention that I am a novice at web programming so excuse me if I am doing something really stupid. I am trying to show the bytesTransferred in a label control on an asp.net form. This simply does not work. When I debug the code, I can see the label.text value getting updated but cannot see the updates on the webpage. I am using BeginGet:EndGet combination and have successfully registered the Progress Event too (thanks to some excellent documentation that comes along with this product). Any ideas? all the help is appreciated. |
Jeff Cranford From: Rome, NY USA Posts: 586 Member Since: 05/30/01 |
posted July 16, 2002 9:33 AM Yes, this is a common mistake when transitioning from Windows to web programming. The ASP (and ASP.NET) system by nature is synchronous. Here is the anticipated execution for an ASP/ASP.NET Script Get HTTP Request Do lots of blocking processing. When processing is complete, send HTTP response. User sees results in browser. Here is what you are attempting to do. (Also, you mention you are using the asynchronous BeginGet method to get the file. I'm not sure how you've been successful using this method in ASP.NET but I would advise not using it for your purposes unless you have a really really good reason. This demonstrates the Ftp.Get method.). Get HTTP Request Call Ftp.Get Progress event fires, update value of Label.Text // This step repeated until file is done transferring. Processing complete, send HTTP response. User sees result in browser. // User only sees last value of Label.Text here. Doh! So what is the solution?? There are some techniques that can be implemented here to get something close to the effect that you want. Since this forum is not intended for mass-code posting, send an email to support@dart.com (ATTN Jeff Cranford) if you are interested in learning more. |
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