The fileUpload looses the file on postback. Therefore the file will be lost when I get the OK from the user. I have tried to put this in Ajax Upload panel but that caused the fileUpload to stop working.
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OK/Cancel message box from Code behind
I have a page with multiple textboxes and two file uploads. When the user has entered his data into all the fields I have one submit button to save all the data.
I want to check if there exists a file with the same name as entered in the file upload and if so I want to alert the user so he can either continue and overwrite the file or cancel. Can anyone explain to me how to make this messagebox?
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Answers
Using AJAX you can avoid the "postback" event altogether. If it is all inside an update panel, the file control should retain it's settings. Would something along the lines of Javascript and a webservice to check for the file existance work out? I am envisioning something like a hidden button which causes a postback where you can handle the file upload, and the visible button causing an AJAX call to the server function (webservice?) which returns true or false with the filename (document.getElementByID("
If you could post your page (HTML) and codebehind, I think I should be able to work it out for you on Monday evening.
Geoff
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by: GeoffSuttonPosted on 2008-09-25 at 19:05:27ID: 22575922
You need to create a popup window of some sort (ASP Panel element with a set size and a background color. Put a message on the panel "This file exists. Click OK to overwrite it, cancel to quit" then having an ok and a cancel button.
Then on the initial upload of ths file(I'd recommend using ASP.NET Ajax with an update panel to avoid page flickering) run a check to see if filecontrol.postedfilename
I didn't give exact code, but merely a walkthrough of how it is done. The code completion in ASP.NET should give you the correct syntax easily enough. This was merely a walkthrough of method to follow on how to accomplish it.
Good luck.