Need a comment for my program & questions.
Dear all,
I have just finished my simple project with LabView.
Actually, I have no much experience with LabView language.
Therefore I would like to hear your invaluable comments about using structure, variable, and some habits to write the program.
Please let me know if you find some bad thing or something should be escaped.
Regarding to my question, as you can see the status window(GPIB, RS-232, and Saving),
I would like to attach the common status window to main dialog with same structure (background).
But the status window couldn't seen in opening the window.
How can I modify it to see the status window in evey tab states?
Thank you in advance.
Lee
Attachments:
control_lsjun_v3_tem2.llb 283 KB
I think I would change the Tab control from the Windows style "Dialog Tab Control" to the standard LabVIEW style "Tab Control" - the Windows dialog style control does not fit in very well with the style/colouring of the LabVIEW control objects, and this is one reason why your status indicators don't integrate "visually" as well as they could.
I don't think it's possible to add an "always visible" part to a tab control, but there are one or two ways to "join" controls together...
1. You could simply use the "Group" front panel objects function in the editor taskbar - this will lock several independent objects together so that they move around together on the front panel (but are still seperate data terminals on the block diagram)
2. You could create a "Custom Control" or "Type Def" from several front panel objects - this way you could create a control which includes both a tab control and LED status indicators (etc, etc), all integrated into one single block diagram terminal/data structure (and is saved, so can be reused in other programs). This option might be a little cumbersome though, if you have many controls and indicators that you want to be included within your tab control (note: the control/indicators actually on the various tab pages do not have to be included in the custom tab type definition).
As regarding programming style - I think you need to try to not use "sequence structures" unless you really have to. I never use sequence structures except as a last resort. If by not using sequence structures the diagram becomes too large, then that is a sign that you might need to create mor sub VIs. Tip: All the sub VIs I create use the "error cluster" input/output, so it's allways possible to sequence sub VIs even when there is no data dependency.
Hope this helps.
Mark H.
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Hello everyone ;
https://forums.oracle.com/message/11078921#11078921
Above link is reference . It's also my own thread related to this discussion.
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Name Null? Type
USERNAME VARCHAR2(30)
ISDBA VARCHAR2(20)
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LOGIN_TIME VARCHAR2(15)
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Program for tracing user logon/logoff details
SQL> create or replace trigger tri_logon
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2 BEFORE LOGOFf on database
3 BEGIN
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6 end;
6 /
Trigger created.
I got following output . Here i cannot insert logout_time on logout_time column.
logout_time is dispalyed seperately please see last two output values (CST01 , 02:06:16) and user_name also displayed twice. (don't need )
USERNAME ISDBA LOGIN_DAT LOGIN_TIME LOGOUT_TIME EXTERNAL_NAME AUTHENTICATION_TYPE HOST
CST01 FALSE 21-JUN-13 02:06:11 oracle DATABASE linuxserver CST01 02:06:16
I want output following below format
Expecting output logout time on LOGOUT_TIME column and user_name should be displayed once.
USERNAME ISDBA LOGIN_DAT LOGIN_TIME LOGOUT_TIME EXTERNAL_NAME AUTHENTICATION_TYPE HOST
CST01 FALSE 20-JUN-13 13:06:34 oracle DATABASE LINUXSERVER
thanks in advance ..8f953842-815b-4d8c-833d-f2a3dd51e602 wrote:
Hello everyone ;
https://forums.oracle.com/message/11078921#11078921
Above link is reference . It's also my own thread related to this discussion.
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USERNAME VARCHAR2(30)
ISDBA VARCHAR2(20)
LOGIN_DATE DATE
LOGIN_TIME VARCHAR2(15)
LOGOUT_TIME VARCHAR2(15)
EXTERNAL_NAME VARCHAR2(30)
AUTHENTICATION_TYPE VARCHAR2(30)
HOST VARCHAR2(20)
In addition to the myriad of other issues pointed out in this and your other -- essentially duplicate -- thread, why do you have separate columns for login_date and login_time? A DATE datatype (which you have correctly defined for LOGIN_DATE carries both date and time elements. You only need one column -- LOGIN_TIME -- populated with SYSDATE when the user logs in. And LOGOUT_TIME should also be a DATE, populated with SYSDATE. This alone points to several design flaws.
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3) You don't have a date for LOGOUT, but suppose the user logs on at 2330 on Tuesday, and logs out at 0030 on Wednesday..
Properly, you should only have two columns for this .. LOGON_TIME, defined as a DATE, and LOGOUT_TIME, defined as a date.
Or possibly separate rows, one for LOGON and one for LOGOUT, both with a sessid to join them.
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Program for tracing user logon/logoff details
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AFTER LOGON ON DATABASE
BEGIN
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SYS_CONTEXT ('USERENV', 'AUTHENTICATION_TYPE'),
SYS_CONTEXT ('USERENV', 'host'),
SYSDATE, TO_CHAR (SYSDATE, 'HH24:MI:SS') FROM DUAL;
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Trigger created.
SQL> create or replace trigger tri_audit1
2 BEFORE LOGOFf on database
3 BEGIN
4 insert into user_login (username, logout_time)
5 (select user, TO_CHAR(SYSDATE, 'HH24:MM:SS') from dual);
6 end;
6 /
Trigger created.
I got following output . Here i cannot insert logout_time on logout_time column.
logout_time is dispalyed seperately please see last two output values (CST01 , 02:06:16) and user_name also displayed twice. (don't need )
USERNAME ISDBA LOGIN_DAT LOGIN_TIME LOGOUT_TIME EXTERNAL_NAME AUTHENTICATION_TYPE HOST
CST01 FALSE 21-JUN-13 02:06:11 oracle DATABASE linuxserver CST01 02:06:16
I want output following below format
Expecting output logout time on LOGOUT_TIME column and user_name should be displayed once.
USERNAME ISDBA LOGIN_DAT LOGIN_TIME LOGOUT_TIME EXTERNAL_NAME AUTHENTICATION_TYPE HOST
CST01 FALSE 20-JUN-13 13:06:34 oracle DATABASE LINUXSERVER
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p.s might be kinda messy, might need to put it into a text editor
Cipher.java
This program encodes and decodes text strings using a cipher that
can be specified by the user.
import java.io.*;
public class Cipher
public static void printID()
// output program ID
System.out.println ("*********************");
System.out.println ("* Cipher *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* CS 181-03 *");
System.out.println ("*********************");
public static void printMenu()
// output menu
System.out.println("\n\n****************************" +
"\n* 1. Set cipher code. *" +
"\n* 2. Encode text. *" +
"\n* 3. Decode coded text. *" +
"\n* 4. Exit the program *" +
"\n****************************");
public static String getText(BufferedReader input, String prompt)
throws IOException
// prompt the user and get their response
System.out.print(prompt);
return input.readLine();
public static int getInteger(BufferedReader input, String prompt)
throws IOException
// prompt and get response from user
String text = getText(input, prompt);
// convert it to an integer
return (new Integer(text).intValue());
public static String encode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String encoded = ""; // base for string to return
char letter; // letter being processed
// convert message to upper case
original = original.toUpperCase();
// process each character of the message
for (int index = 0; index < original.length(); index++)
// get the letter and determine whether or not to
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letter = original.charAt(index);
if (letter >='A' && letter <= 'Z')
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// determine whether result will be out of A-Z range
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return encoded;
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// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String decoded = ""; // base for string to return
char letter; // letter being processed
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// process each letter of message
for (int index = 0; index < original.length(); index++)
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// determine whether result will be out of A-Z range
if ((letter - offset) < 'A') // wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE - offset);
else
if ((letter - offset) > 'Z') // wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE - offset);
else
letter = (char) (letter - offset);
// build decoded message
decoded = decoded + letter;
return decoded;
// main controls flow throughout the program, presenting a
// menu of options the user.
public static void main (String[] args) throws IOException
// declare constants
final String PROMPT_CHOICE = "Enter your choice: ";
final String PROMPT_VALID = "\nYou must enter a number between 1" +
" and 4 to indicate your selection.\n";
final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
"cipher: ";
final String PROMPT_ENCODE = "\nEnter the text to encode: ";
final String PROMPT_DECODE = "\nEnter the text to decode: ";
final String SET_STR = "1"; // selection of 1 at main menu
final String ENCODE_STR = "2"; // selection of 2 at main menu
final String DECODE_STR = "3"; // selection of 3 at main menu
final String EXIT_STR = "4"; // selection of 4 at main menu
final int SET = 1; // menu choice 1
final int ENCODE = 2; // menu choice 2
final int DECODE =3; // menu choice 4
final int EXIT = 4; // menu choice 3
final int ALPHABET_SIZE = 26; // number of elements in alphabet
// declare variables
boolean finished = false; // whether or not to exit program
String text; // input string read from keyboard
int choice; // menu choice selected
int offset = 0; // caesar cipher offset
// declare and instantiate input objects
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
// Display program identification
printID();
// until the user selects the exit option, display the menu
// and respond to the choice
do
// Display menu of options
printMenu();
// Prompt user for an option and read input
text = getText(input, PROMPT_CHOICE);
// While selection is not valid, prompt for correct info
while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
!text.equals(EXIT_STR) && !text.equals(DECODE_STR))
text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
// convert choice to an integer
choice = new Integer(text).intValue();
// respond to the choice selected
switch(choice)
case SET:
// get the cipher value from the user and constrain to
// -25..0..25
offset = getInteger(input, PROMPT_CIPHER);
offset %= ALPHABET_SIZE;
break;
case ENCODE:
// get message to encode from user, and encode it using
// the current cipher value
text = getText(input, PROMPT_ENCODE);
text = encode(text, offset);
System.out.println("Encoded text is: " + text);
break;
case DECODE:
// get message to decode from user, and decode it using
// the current cipher value
text = getText(input, PROMPT_DECODE);
text = decode(text, offset);
System.out.println("Decoded text is: " + text);
break;
case EXIT:
// set exit flag to true
finished = true ;
break;
} // end of switch on choice
} while (!finished); // end of outer do loop
// Thank user
System.out.println("Thank you for using Cipher for all your" +
" code breaking and code making needs.");
}My source in code format...sorry guys :)
Cipher.java
This program encodes and decodes text strings using a cipher that
can be specified by the user.
import java.io.*;
public class Cipher
public static void printID()
// output program ID
System.out.println ("*********************");
System.out.println ("* Cipher *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* CS 181-03 *");
System.out.println ("*********************");
public static void printMenu()
// output menu
System.out.println("\n\n****************************" +
"\n* 1. Set cipher code. *" +
"\n* 2. Encode text. *" +
"\n* 3. Decode coded text. *" +
"\n* 4. Exit the program *" +
"\n****************************");
public static String getText(BufferedReader input, String prompt)
throws IOException
// prompt the user and get their response
System.out.print(prompt);
return input.readLine();
public static int getInteger(BufferedReader input, String prompt)
throws IOException
// prompt and get response from user
String text = getText(input, prompt);
// convert it to an integer
return (new Integer(text).intValue());
public static String encode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String encoded = ""; // base for string to return
char letter; // letter being processed
// convert message to upper case
original = original.toUpperCase();
// process each character of the message
for (int index = 0; index < original.length(); index++)
// get the letter and determine whether or not to
// add the cipher value
letter = original.charAt(index);
if (letter >='A' && letter <= 'Z')
// is A-Z, so add offset
// determine whether result will be out of A-Z range
if ((letter + offset) > 'Z') // need to wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE + offset);
else
if ((letter + offset) < 'A') // need to wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE + offset);
else
letter = (char) (letter + offset);
// build encoded message string
encoded = encoded + letter;
return encoded;
public static String decode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String decoded = ""; // base for string to return
char letter; // letter being processed
// make original message upper case
original = original.toUpperCase();
// process each letter of message
for (int index = 0; index < original.length(); index++)
// get letter and determine whether to subtract cipher value
letter = original.charAt(index);
if (letter >= 'A' && letter <= 'Z')
// is A-Z, so subtract cipher value
// determine whether result will be out of A-Z range
if ((letter - offset) < 'A') // wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE - offset);
else
if ((letter - offset) > 'Z') // wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE - offset);
else
letter = (char) (letter - offset);
// build decoded message
decoded = decoded + letter;
return decoded;
// main controls flow throughout the program, presenting a
// menu of options the user.
public static void main (String[] args) throws IOException
// declare constants
final String PROMPT_CHOICE = "Enter your choice: ";
final String PROMPT_VALID = "\nYou must enter a number between 1" +
" and 4 to indicate your selection.\n";
final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
"cipher: ";
final String PROMPT_ENCODE = "\nEnter the text to encode: ";
final String PROMPT_DECODE = "\nEnter the text to decode: ";
final String SET_STR = "1"; // selection of 1 at main menu
final String ENCODE_STR = "2"; // selection of 2 at main menu
final String DECODE_STR = "3"; // selection of 3 at main menu
final String EXIT_STR = "4"; // selection of 4 at main menu
final int SET = 1; // menu choice 1
final int ENCODE = 2; // menu choice 2
final int DECODE =3; // menu choice 4
final int EXIT = 4; // menu choice 3
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String text; // input string read from keyboard
int choice; // menu choice selected
int offset = 0; // caesar cipher offset
// declare and instantiate input objects
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
// Display program identification
printID();
// until the user selects the exit option, display the menu
// and respond to the choice
do
// Display menu of options
printMenu();
// Prompt user for an option and read input
text = getText(input, PROMPT_CHOICE);
// While selection is not valid, prompt for correct info
while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
!text.equals(EXIT_STR) && !text.equals(DECODE_STR))
text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
// convert choice to an integer
choice = new Integer(text).intValue();
// respond to the choice selected
switch(choice)
case SET:
// get the cipher value from the user and constrain to
// -25..0..25
offset = getInteger(input, PROMPT_CIPHER);
offset %= ALPHABET_SIZE;
break;
case ENCODE:
// get message to encode from user, and encode it using
// the current cipher value
text = getText(input, PROMPT_ENCODE);
text = encode(text, offset);
System.out.println("Encoded text is: " + text);
break;
case DECODE:
// get message to decode from user, and decode it using
// the current cipher value
text = getText(input, PROMPT_DECODE);
text = decode(text, offset);
System.out.println("Decoded text is: " + text);
break;
case EXIT:
// set exit flag to true
finished = true ;
break;
} // end of switch on choice
} while (!finished); // end of outer do loop
// Thank user
System.out.println("Thank you for using Cipher for all your" +
" code breaking and code making needs.");
}
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