String comparisons

[jvh75021]

Greetings,

I  am a neophyte user (stating the obvious here) having trouble with string comparisons. The little vi attached ran an turned green one time but forever after I cannot get it to indicate green regardless of input.

My eventual goal will be to determine if a device is generating the string "Enter User ID:". Would 'Match True/False String' prefaced with some type of string trimming be an acceptable method?

Thanks,

jvh 

[GerdW]

Hi jvh,

the equal function is perfect for comparing string for equality!

Your problem is probably the switch "limit to single line", accessible via right-click of the string control. This will prevent NewLines getting added to the string content... Otherwise make the string controls bigger to show more than one line of text

[JÞB]

OK I looked at your vi.  I have no problem getting the boolean to be True.  Just typr the same text in each string input and "enter" the varible. by one of the following means:

1. Click the check mark in the toolbar
2. Depending on your LabVIEW.ini file:
   1. hit <enter>
   2. click anywhere on the FP to remove focus from the string indicator

See the pictures below

[jvh75021]

Thank you both as I learned from both replies. (They came a lot quicker than expected too.)

It would work if I just entered the string and then hit run. The CRLF was definitely the problem. I forgot that the enter keys were different. Well I forgot about the check mark too. 

Shoulda got busy right after class but work was too hectic.

BTW, is there a way to trim off carriage returns, etc on strings coming in from a device? 

Thanks again,

jh 

[GerdW · Accepted solution]

Hi jhv,

there is a function "Trim whitespaces" in the string functions palette...