Input over Barcode-Scanner

[SeppR]

After read barcode with a scanner, testsequenz should be start.

I wanted to solve this with an event structure.
However, the comment “I'm here” is only displayed when I click next to the input field and the button focus remains on the input field “Labelcode”.

[pincpanter]

If the input string is terminated by a newline, right click on the string control an set Limit to single line.

If not, set Update value while typing instead; however, this way there is the risk to get a partial input.

[RTSLVU]

An Event Case inside a Flat Sequence is just wrong on so many levels...

My Band-Aid would be to just poll the string control in a While Loop at 100mS intervals until it contained the proper number of characters in the right format to be a valid serial number.

But the real solution would be to start over with better code.

[LVNinja]

You may be able to program the barcode scanner to send a new line after the string, so Labview will get out of the event. 

[Eric1977]

To expand on everyone's advice, remove everything on the block diagram and just add a string control. Then, right-click and select Limit to Single Line & '/" Codes display and see what you get.

Those barcode scanners might return a /r or /n (or both).

[pincpanter]

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@RTSLVU  ha scritto:

An Event Case inside a Flat Sequence is just wrong on so many levels...

My Band-Aid would be to just poll the string control in a While Loop at 100mS intervals until it contained the proper number of characters in the right format to be a valid serial number.

But the real solution would be to start over with better code.

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I just assumed it was a prototypal code, essentially a proof-of-concept. But you are right, the code is ugly and it's difficult to add any further functionality.

In this very old post I attached a vi that can be useful. The original question was how to prevent a user to manually input a string in place of the barcode reader, however my vi can be easily modified in such a way to overcome the issue of receiving a partial string. This requires to enclose the event in a while loop, because it's necessary to manage multiple events.