WriteToTextFile -- how to prompt ONCE??

how do i get (text) File I/O VI's to prompt
only ONCE for a filepath and then use that
from then on?
if i leave FilePath unwired, (because i want
the user prompted) i get prompted for
file location on EACH ITERATION, even with
"Append" wired True. that is, the data is being
appeneded, but it constanly brings up the file dialogue box.
i want it to come up only the first time upon program
execution.
-tony

Put a shift register on the loop containing the file write function. Connect the left shift register node to the file path input to the write vi. Connect the file path output from the write vi to the right shift register node. Do NOT initialize the shift register.
The first time you run the vi, the shift register will contain an empty path and so prompt you for a file to write. The path to the resulting file will be put into the shift register so the 2nd time through the loop the routine won't ask for a file name.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

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-- My System Center blog ccmexec.com -- Twitter
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END IF;
END:Hope this helps.
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-- If my response or the response of another answers your question, please mark the response accordingly. Thanks!

How to prompt for user input in PL/SQL

How do I prompt for user input in PL/SQL?
I am writing a piece of code where the user may choose, by clicking either of three buttons on an alert, to have the system assign a value to a variable, to input a value or to do neither?
If the user chooses to input the value I want to update a set of database fields with the value.
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Edited by: desgordon on Sep 3, 2008 10:33 AM

desgordon wrote:
How do I prompt for user input in PL/SQL?
I am writing a piece of code where the user may choose, by clicking either of three buttons on an alert, to have the system assign a value to a variable, to input a value or to do neither?OK, you're doing that in Forms...
>
If the user chooses to input the value I want to update a set of database fields with the value.Write PL/SQL procedure for this purpose...
>
I have thought about showing a view where the value may be entered into a field displayed on that view. The value will be assigned to the variable by the user clicking a command button. The question I have in this case though, is whether, after the command button is clicked, control will be passed back to the code that called the view in the first place?Not clear what you mean with view?
But if you call your procedure in that button then yes 'control will be passed back to the code'...
Cheers!
Edited by: Faust on Sep 3, 2008 7:57 PM
Too slow...

Why doesn't the input file dialog prompt once I attach it to a device?

For my project I am require to move a 3-axis robot from a list of set co-ordinates to either cut into/draw a picture. The only way I can thnk of doing this is by reading the co-ordinates from a spread sheet and timing it to read the co-ordinates and send the information to the straight-line move function (Softmotion).
The problem occurs once I try to run the program while it's connected to the devices (motors). The file dialog prompt no longer shows up and Error 43 shows up right away. I traced the problem to the read from spread sheet vi, but I am not sure what to do because it is a standard function in labview.
If you could take a look and give me some input it would be greatly appriciated, I've been learning labview on my own for about a month so if you can please use simple explinations.
Solved!
Go to Solution.
Attachments:
3-Degrees of Freedom Cartesian Robot.lvproj ‏15 KB
Multiple Position Movement_6.vi ‏128 KB

Thanks for the help so far, so I did as you said and added a set path for the program to retreive the file from. I've tested the program by running it in my computer and the file reads properly so my assume is the file is being located and data is taken properly.
But I still run into the same error when I run it in cRio. I'm still being told labview cannot locate the file.
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3-Degrees of Freedom Cartesian Robot.lvproj ‏20 KB
Multiple Position Movement_9.vi ‏76 KB
Error 7.png ‏107 KB

How to prompt user to enter City & print out the Country it belongs to?

I have one table with “country“ column and “city” column. I need to prompt the user to enter the city name. Then the program should print which country it belongs to. As an example, if user enters “Paris”, program should recognize that it’s in “France” and it should print it out as follows:
Paris ------------------France
Here’s my code:
ACCEPT p_1 PROMPT 'Please enter the city name:'
DECLARE
v_parent_name ccname.parent_name%TYPE:= '&p_1';
v_child_name ccname.child_name%TYPE := '&p_1';
CURSOR reg_cur
IS
    SELECT child_name, parent_name INTO v_child_name, v_parent_name FROM ccname;
BEGIN
FOR reg_rec IN reg_cur
LOOP
    DBMS_OUTPUT.PUT_LINE(UPPER(RPAD(v_child_name, 15)) || '      ' || UPPER(RPAD(v_parent_name, 15)));
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Edited by: user13675672 on Feb 1, 2011 10:15 PM

Hi,
Do you want people to help you? Then try to help them. Post a little sample data (CREATE TABLE and INSERT statements), some parameters you might want to pass, and the results you would want from that sample data for each of the parameters.
If you can use commonly available tables, such as those in the scott or hr schemas, to show your problem, then you don't have to post any sample data; just the parameters (if any) and results.
For example, your problem is:
"I have a table with city and country columns. I want to input a city, and display the country from that same row." That's a lot like:
"The scott.emp table has ename and job columns. I want to input an ename and display the job from that same row."
So, given the name SCOTT, you would want this output:
ENAME      JOB
SCOTT      ANALYSTor, given MILLER you would want:
ENAME      JOB
MILLER     CLERKHere's one way to do that in SQL*Plus:
ACCEPT p_ename PROMPT 'Please enter the employee name: '
SELECT     ename
,     job
FROM     scott.emp
WHERE     ename     = '&p_ename'
;Don't use a meaningless name, like p_1, when you can use a helpful name, like p_ename.
As Billy pointed out, PL/SQL wasn't designed for user interaction like this. There's no point in trying to use PL/SQL to do it.
I hope that answers your question.
If not, please help me understand, so I can do a better job next time. Don't just say "This doesn't work", or "This is not what I'm trying to get", or "Any other ideas?". Those things don't help anyone understand anything. Point out where the suggested soloution is not working, explain what you are trying to get, and give specific examples.

WriteToTextFile -- how to prompt ONCE??

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