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How do I disable upload button until user selects a file Options
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imsam67
#1 Posted : Wednesday, December 14, 2011 8:52:55 PM
Rank: Member

Groups: Registered

Joined: 11/22/2011
Posts: 17
Location: Florida

I want to make sure that users cannot click the "Upload" button unless he/she's selected at least one file.

How do I disable the upload button until there's at least one file to upload?


Thanks,
Sam
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Axosoft
#2 Posted : Thursday, December 15, 2011 11:36:07 AM
Rank: Administration


Groups: Administrators

Joined: 7/7/2005
Posts: 1,586
Location: Scottsdale, AZ

I would suggest this:

  • Set the button disabled initially
  • Add handlers for OnClientFileAdded and OnClientFileRemoved that both point to a javascript onClientFileSelectionChanged function
  • In that function, check to see if there are files, and set enabled. Like this:
        
        function onFileSelectionChanged(data)
        {
            if (kw("<%=slickUpload.ClientID %>").get_Files().length > 0)
// TODO: set enabled
    else
// TODO: set disabled
        }
        
Will that work for you?
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