Any way to limit the input format for string control?

Hi there,
I need a control for the user to input some string with only alphabets and no special characters. Also need to control the number of characters to input. I search it and see someone use Xcontrol to achieve that but I really have no idea how to get that. Any other way to get this function works on string input?

prvs wrote:
Dear Altenbach,
The VI that you have posted in (Max8Discard.vi) in Limiting Input String Length
limits the entry of string control to required length but it doesnt limit the entry of special characters.
If you have any simple way to do the same it will be very helpful
Thanks in advance...!!!
Regards,
Praveen PRVS
Just change the check after the Lexical Class function. If you just want numbers and letters, then use the In Range & Coerce function to check for class numbers 3 through 5. Play around with the logic some more until you get what you need (I'm thinking that AND should be an OR).
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prvs wrote:
Dear Altenbach,
The VI that you have posted in (Max8Discard.vi) in Limiting Input String Length
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If you have any simple way to do the same it will be very helpful
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Just change the check after the Lexical Class function. If you just want numbers and letters, then use the In Range & Coerce function to check for class numbers 3 through 5. Play around with the logic some more until you get what you need (I'm thinking that AND should be an OR).
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Hi there,
I follow one example online to deveope a xcontrol for string input but limiting the input characters only to uppercase A to Z. I have the main code shown as follow
In the Key down event, I discard all input character with ascii code beyond [65, 90]. This seems to works but if I keep pressing down a forbidden key (e.g. %), it will show that key in the control. So how can I ban the input by long press on one key? Thanks.
Solved!
Go to Solution.

Hi dragondriver,
and while you're editing your VI you should use an InRangeAndCoerce function to replace two comparisons and a boolean function!
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#8000
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Message Edited by Space_Flight on 11-20-2006 10:08 AM
Attachments:
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