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MathGroup Archive 2009

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Re: FileNameSetter[], Dynamic[]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg101015] Re: [mg101001] FileNameSetter[], Dynamic[]
  • From: John Fultz <jfultz at wolfram.com>
  • Date: Sun, 21 Jun 2009 07:04:03 -0400 (EDT)
  • Reply-to: jfultz at wolfram.com

On Fri, 19 Jun 2009 20:49:14 -0400 (EDT), Scot T. Martin wrote:
> My objective is to make an interface that allows a user to select a file
> and then that file will be opened by Mathematica and actions (i.e., data
> processing) will be taken. If the user changes the file selection, all
> actions will be repeated on new file.
>
> Here's what I have tried:
>
> FileNameSetter[Dynamic[filename], "Open"]
>
> data = Dynamic[Import[filename, "Byte"]]
>
> The Notebook indeed displays the updated data as a cell, yet other=
 actions
> don't work, e.g., Length[data] always returns 1 and FullForm[data] shows
> Dynamic[Import[filename,"Byte"]].
>
> Am I approaching this problem incorrectly?

I answered exactly this question a few months ago in this post...

http://forums.wolfram.com/mathgroup/archive/2009/Feb/msg00424.html

Sincerely,
 
John Fultz
jfultz at wolfram.com
User Interface Group
Wolfram Research, Inc.




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