To make a string control in alphanumeric mode

[L4U]

Hi,

     I'm trying to make a string control for sending commands to an instruments.

     The instruments takes only alphanumeric character, So  i want to create a string

     control which accept alphanumeric(A-Z, a-z, 0-9) values only. How its possible in

     labview, someone please help me.

With Regards

LJ

[TCPlomp]

Register for a 'key down?' event for that string control, and discard it if it is an invalid char:


Be aware, that 'shift' and 'enter' are discarded as well, this can be toggled by the outher case structure.

Ton

Message Edited by TonP on 07-16-2007 07:40 AM

[altenbach]

Instead of the big, complicated inner case structure in TonP's example, simply use the "lexical class" primitive from the comparison palette.

For example you could discard everything except lexical class 4 and 5. Adjust as needed.

[tst]

You can always trust Altenbach to notice those little used primitives.

[Yi Y]

Brilliant as usual, Altenbach!  Thank you!

Yi Y.
Applications Engineer
http://www.ni.com/support