How to get file path from <cfinput type="file">

As sdsinc_ has pointed out, CF (server-side) doesn't have access to a user's computer (client-side) so can't "see" the path of the file being uploaded.

And if you are concerned about your server's disk I/O (like I am), you can actually upload the file without saving it to a particular location.  As it turns out, CF _does_ automatically save the file to a TEMP folder with no execution privileges, but it will stay there only a fleeting fraction of a second, just enough time for code to tell CF where to finally save it.  I've worked on projects where CF received a file without saving it to the hard drive, and instead populated a database.  Zero time writing it on the CF server, zero time having to remove it once processed, no clean-up, no mess, all in RAM until done with the database.

V/r,

^ _ ^

After the form submission, you must upload the file to your server first (you can't read a file on a user's computer).

Try this:

<cfif isdefined("form.loadData")>

     <cffile action="upload" formfield="choosefile" destination="YOUR SERVER DIRECTORY HERE">

     <cfif fileExists("#serverDirectory#\#cffile.serverfile#")>

          <cffile action="read" file="#serverDirectory#\#cffile.serverfile#" variable="jsondataFromFile">

          <cfdump var="#jsondataFromFile#">

     </cfif>

<cfif>