FileUpload control lossing selected after postback

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Hi guys,

I am facing an issue with FileUpload Control in ASP.Net 3.5.

I selected a file in FileUpload and in the same page there is a checkbox and which is causing postback on selected index changed. and on postback Fileupload is losing selected file.

I tried by using updatepanel and write the check box area in Update panel. but page is still cauisng postback.

Any help or suggestion will be appreciated.

Anything need to know more about this issue, please gimme a shout .

thanks.

Posted 20-Jan-14 1:04am

Mishra Laxmikant

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Karthik_Mahalingam 20-Jan-14 7:16am

try to put the file upload control in a seperate update panel

Mishra Laxmikant 20-Jan-14 7:38am

thanks for your quick responce, But till yet, I have put checkbox only in update panel. and fileupload is out side

Mishra Laxmikant 20-Jan-14 8:15am

Even i am not able to use ClientIDMode

JoCodes 20-Jan-14 9:50am

Its a common issue related to the Fileupload control in 3.5 version . It needs a full postback , so try to add triggers.

Check this reference
http://www.aspsnippets.com/Articles/Using-FileUpload-Control-inside-ASP.Net-AJAX-UpdatePanel-Control.aspx

Mishra Laxmikant 21-Jan-14 1:06am

probably i couldn't explain my problem properly, See FileUpload is lossing selected file just because of postback which is caused by Checkbox. Even i have put checkbox in separate updatepanel. So now problem is Updatepanel is letting postback the complete page in stead of partial.

Hope you got now. if you could suggest any solution, i will be thankful.

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Saddam Khan Ranjhani · Answer 1 · 2014-01-20T02:17:00

Solution 1

try to put that filepath in session
and then get it back as the page backs from postback

Posted 20-Jan-14 2:17am

Saddam Khan Ranjhani

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Mishra Laxmikant 20-Jan-14 14:09pm

Saddam, probably you may be right, but After postback i have show the selected file in file upload control as well. i tried to set fileupload controls on most of events if page, even on the Unload. but I found that FileUpload1.HasFiles shown true, which means fileupload selected file are getting lose after Page_Unload

Mishra Laxmikant 21-Jan-14 7:55am

Sorry but, this is not working out.