Sharepoint 2010 How to use "File Size" column value in a formula? -


i trying use "file size" (aka "filesizedisplay") in calculated column formula.

"file size" existing column (default sp not custom). not available in "insert column" list of library. , sp displays error message states not exist if added formula manually either [file size] or [filesizedisplay].

all want inform user image big. not trying prohibit file size upload or technical that. want calculated column display message. if column value available following work:

=if([file size]>50000,"image big","image sized correctly")

or

=if([filesizedisplay]>50000,"image big","image sized correctly")

any 1 know why column not available?

cheers

you'll want file size first: get file size can display of message in pop or how ever you'd like

using system; using system.io;  class program {     static void main()     {     // name of file     const string filename = "test.txt";      // create new fileinfo object , length.     fileinfo f = new fileinfo(filename);     long s1 = f.length;      // change file. demo.     file.appendalltext(filename, " more characters.");      // create fileinfo object , length.     fileinfo f2 = new fileinfo(filename);     long s2 = f2.length;      // print out length of file before , after.     console.writeline("before , after: " + s1.tostring() +         " " + s2.tostring());      // difference between 2 sizes.     long change = s2 - s1;     console.writeline("size increase: " + change.tostring());     } }

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