How to save controls value in labview

hi
i want to know how to save the controls value in PC. means if i assign 5 digital value to a control it should remain there even i restarts my PC.
Solved!
Go to Solution.

This can mean two things. Will the default value always be 5? You could right click the control, select Data Operations, then Make Current Values Default. This can only be done at edit time and the value is saved with the vi. If you know you will always need the same default value then do this. If you need the user to be able to change the default value without editing and saving the vi then see the post by smercurio_fc above.
=====================
LabVIEW 2012

Similar Messages

How to save a value in form jsp?

hi all,
i have a dropdown list in my struts web app,
i am having a form in which a bean is instatiated(bean has 2 properties "name" and "code").
i am using like this in the jsp:
<td><html:select property="item.code">
                         <logic:iterate id="itemType"
                              name="<%=WebConstants.getItemTypeListName()%>">
                              <option value='<bean:write name="ItemType" property="code"/>'><bean:write
                                   name="ItemType" property="name" /></option>
                         </logic:iterate>
                    </html:select></td>
each "itemType" has "code" and "name".
when the user clicks on the item name on the dropdown item beans "code" is populating.now i need to populate "name" aswell at the sametime using hidden property.
i want to save tha value of name in the jsp to use it later to populate "name" in my form using hidden property?
do anyone have idea how to save the value in jsp?
regards and thanks in advance

Thank you. I execute the program below. I can now retrive the data from the Lt.txt. But the value is limited to 3 digits. For example, the content of my file is 777888.
When I run the program, I only get 777. How can I retrive the whole exact number?
import java.io.*;
               class Test {
               public static void main(String args[]) {
               try {
               File inputFile = new File("Lt.txt");
               File outputFile = new File("outagain.txt");
               FileReader in = new FileReader("Lt.txt");
               FileWriter out = new FileWriter(outputFile);
               char[] tmp = new char[3];
               int cnt = in.read(tmp);
               System.out.print("\nRead: ");
               for (int i = 0; i < cnt; i++) {
               System.out.print(tmp);               }
               System.out.println(" ");
               in.close();          }
               catch (IOException ex) {
               System.out.println("IOException:"+ex.toString());          }     }}

LabVIEW saves control values automatically - resulting in large files

Hello,
I have a problem in LabVIEW. I'm using Vision Development Module and when I save the VI the file is very large (few MB). When I open it back in LabVIEW it turns out that all values on front panel controls have been saved (including images, what makes the file so big).
Somehow LabVIEW saves the VI with controls values by default, even if I don't want to do that.
How to turn it off?

Hi Daresh,
I think that simply reinitializing the controls (and indicators probably) might solve your problem.
Please take a look at this knowledge base, to find out how to do this programmatically and let me know, if this resolved your issue.
Have a great day!
Best regards,
Jano

How to save the value in Cedit control into a text file bu using measurement studio c++?

Im using measurement studio c++ to create a application. How to save a randomly generated value which display in the CNumberEdit Control to a text file? how to do the coding part?

You can use the CNiFile class to write the value out to a file. For example, create a new Measurement Studio C++ project and follow these steps:
Add a CNiNumEdit to the dialog.
Add a member variable for the CNiNumEdit called m_numEdit.
Add a button to the dialog.
Double-click the button to add a message handler for the button's BN_CLICKED message.
Add the following code to the button's BN_CLICKED message handler:
CNiFile file("C:\\Values.log", CFile::modeCreate | CFile::modeWrite | CFile::typeText);
file << m_numEdit.Value << endl;
file.Close();
Run the application, edit the CNiNumEdit's value, and click the button. The value should be written to the Values.log
file as specified in the code above.
Hope this helps.
- Elton

How to save a value ?

Hello. I am making a program in Labview....and my problem is for example:at the end of a cicle i need to save the result that has been calculated in the cicle...so i can use it later in other cicle calculations....
my question is how can i save that value in a variable (or register) ?
thanks
JOSE

Sorry i said cicles instead of loops. I understand that the value is in the wire that conect to other things outside the loop...i just canot save/store it in some 'variable' so i can use it later...i will try a shif register
thanks again for your anwsers
JOSE

How to save a value in a .txt n retrive back the exact value from the file?

Well I have a number. Let's say 600. I need to save this value in a .txt file so that I can retrive this value. I tried using the below source code. It can be executed but I'll get num 49 everytime I execute it even though the value in my .txt is 600.
try {
               File inputFile = new File("Lt.txt");
               File outputFile = new File("outagain.txt");
FileReader in = new FileReader("Lt.txt");
FileWriter out = new FileWriter(outputFile);
int c;
          c = in.read();
          in.close();
System.out.print("\nggggggggg"+c);
in.close();
               } catch (IOException ex) {
               System.out.println("IOException:"+ex.toString());

Thank you. I execute the program below. I can now retrive the data from the Lt.txt. But the value is limited to 3 digits. For example, the content of my file is 777888.
When I run the program, I only get 777. How can I retrive the whole exact number?
import java.io.*;
               class Test {
               public static void main(String args[]) {
               try {
               File inputFile = new File("Lt.txt");
               File outputFile = new File("outagain.txt");
               FileReader in = new FileReader("Lt.txt");
               FileWriter out = new FileWriter(outputFile);
               char[] tmp = new char[3];
               int cnt = in.read(tmp);
               System.out.print("\nRead: ");
               for (int i = 0; i < cnt; i++) {
               System.out.print(tmp);               }
               System.out.println(" ");
               in.close();          }
               catch (IOException ex) {
               System.out.println("IOException:"+ex.toString());          }     }}

How to save a value in a byte array, retrieve it and display it?

Hi,
I am doing a project for my data structures class that involves saving a value (given in String format) in a byte array (our 'memory'). Initially I just tried casting character by character into the byte array and casting back to char[] for retrieval (using .toString() to return what's supposed to be the original string), but this did not work. I tried the .getBytes() method, applying it to the string and then trying to recover it by placing the contents of the 'memory' in a byte array and applying toString(), but that didn't work either. I looked a bit and found this class, CharsetEncoder and CharsetDecoder. I tried to use these but when I try the compiler tells me I cannot instantiate CharsetDecoder because it is an abstract class. At this point I'm at a loss as to what I can do. Is there any way to place a string in a byte array and then recover the string in it's original format? For example, I might save a value in my particular class of "456". But when I try to recover the value from my 'memory' i.e. the byte array, it comes out like [gnue@hnju.... or something similar. I need it to output the original string ("456").
Below is my code as it is right now, for the methods setValue and getValue.
Thanks!
public void setValue(String value) throws InvalidValueException {
     // stores the given value in the memory area assigned to the variable
          if(this.type.isValidValue(value)){
               bytes = value.getBytes();
               int i,j,k;
               int l=0;//might be wrong?
               int ad=address-(address%4);
               mem.readWord(ad);
               reg=mem.getDataRegister();
               if((address%4)+bytes.length-1<4){
                    for(i=address%4;i<address%4+bytes.length;i++)
                         reg.setByte(i, bytes[i]);
                    mem.setDataRegister(reg);
                    mem.writeWord(ad);
               else if((address%4)+bytes.length-1>=4){
                    if(address%4!=0){
                         for(i=address%4;i<4;i++){
                              reg.setByte(i, bytes);
                              l++;
                         mem.setDataRegister(reg);
                         mem.writeWord(ad);
                         ad+=mem.WORDSIZE;
                    while(ad<address+bytes.length-(address+bytes.length)%4){
                         for(j=0;j<4;j++){
                              reg.setByte(j, bytes[j+l]);
                              l++;
                         mem.setDataRegister(reg);
                         mem.writeWord(ad);
                         ad+=mem.WORDSIZE;
                    if((address+bytes.length)%4!=0){
                         mem.readWord(ad);
                         reg=mem.getDataRegister();
                         for(k=0;k<(address+bytes.length)%4;k++){
                              reg.setByte(k, bytes[k+l]);
                              l++;
                         mem.setDataRegister(reg);
                         mem.writeWord(ad);
               else
                    throw new InvalidValueException("The value passed is not valid.");
     /** Gets the current value of the variable.
     @return current value converted to String
     public String getValue() {
          // returns the current value stored in the corresponding memory area
          // value is converted to String
          bytes=new byte[this.getType().getSize()];
          int i,j,k;
          int l=0;//might be wrong?
          int ad=address-(address%4);
          mem.readWord(ad);
          reg=mem.getDataRegister();
          if((address%4)+bytes.length-1<4){
               for(i=address%4;i<address%4+bytes.length;i++)
                    bytes[i] = reg.readByte(i);
          else if((address%4)+bytes.length-1>=4){
               if(address%4!=0){
                    for(i=address%4;i<4;i++){
                         bytes[i] = reg.readByte(i);
                         l++;
                    ad+=mem.WORDSIZE;
               mem.readWord(ad);
               reg=mem.getDataRegister();
               while(ad<address+bytes.length-(address+bytes.length)%4){
                    for(j=0;j<4;j++){
                         bytes[j+l] = reg.readByte(j);
                         l++;
                    ad+=mem.WORDSIZE;
               if((address+bytes.length)%4!=0){
                    mem.readWord(ad);
                    reg=mem.getDataRegister();
                    for(k=0;k<(address+bytes.length)%4;k++){
                         bytes[k+l] = reg.readByte(k);
                         l++;
          return bytes.toString();

You can certainly put it into a byte array and then construct a new String from that byte array. Just calling toString doesn't mean you'll automatically get a meaningful string out of it. Arrays do not override the toString method, so the use the one inherited from object.
Look at String's constructors.

How to save a value (not in file) in Labview?

Hello,
I seems to be an easy question, but i don't know how to do it. I want to save the first value from my acquisition board (BUT NOT IN A FILE), in Labview "memory" and keep it for a later use. Like a variable stored in programming. With shift register it's continuing updating, and when i stop the shift register loop, it gave me 0 value. How to do it ? Thanks in advance!

It sounds like they want the value to live through closing the VI and opening it for another time. If you're just wanting to maintain the value through the single run, shift registers will carry the value. If you don't initialize the value (wire something into the left register), they will maintain the value as long as you don't close LabVIEW and kill the memory allocation.
If you want to keep the value until the next run, you'll need to use Invoke Node to make that value default. That way, it will open up next time with the value saved.

Why can't I save control values while running an application in 6.1?

In Labview 5.1 I was able to save change control and indicator values while running the application. I accomplished this by using the MAKE CURRENT VALUES DEFAULT Method on a VI invoke node. How do I accomplish the same in 6.1?

If I remember correctly, the same limitation with the method existed in 5.1 as it does in 6.1 - namely you can't use the method while the VI is running. See here, here, and here for just a brief sample of the numerous times this question has come up and the possible solutions.

How to save vi designed in Labview 7.0 express, so that it opens in labview 4.1 ?

I have student version of Labview on my computer and have designed a vi in it. However my lab as Labview 4.1. The "save with options" gives only option of saving it for 6.0 version. How do I save it so that my vi opens in labview 4.1
Thanks
Ujwal

Every LabVIEW version only saves in the previous version, so you would need 6.1, 6.0, 5.1, and 5.0 to convert to 4.1.
The main problem is that many features got added with each version upgrade, so it might not be possible to convert everything back if you use any new features in your VI (e.g. event structures).
If the VI is rather simple, it might be easiest to just rewire it in 4.1. You can also post it here, maybe somebody has all versions still installed and can do it for you. (I can currently only go back to 5.1, earler versions are no longer installed).
LabVIEW Champion . Do more with less code and in less time .

How to save input values in a dialog?

Hi there,
I've got the following dialog with an EditText in it:
var win, form;
form = "dialog { \
    orientation: 'column', \
    alignChildren: ['fill','top'], \
    preferredSize: [305, 300], \
    text: 'Form', \
    margins: 15, \
    input_group: Panel { \
        text: 'Number', \
        orientation: 'row', \
        alignChildren: ['fill','top'], \
        margins: 15, \
        input_obj: EditText { \
            text: '' \
win = new Window(form);
Once the dialog is closed, I want it to save the EditText values, so when I open it again it already has it filled.
How do I create this behaviour?
Thanks!

Alternatively, you could use customOptions:
var win, form;
form = "dialog { \
    orientation: 'column', \
    alignChildren: ['fill','top'], \
    preferredSize: [305, 300], \
    text: 'Form', \
    margins: 15, \
    input_group: Panel { \
        text: 'Number', \
        orientation: 'row', \
        alignChildren: ['fill','top'], \
        margins: 15, \
        input_obj: EditText { \
            text: '' \
    btn: Button { \
        text: 'Click me' \
win = new Window(form);
win.btn.onClick = function () {
    var desc = new ActionDescriptor();
    desc.putString(0, win.input_group.input_obj.text);
    app.putCustomOptions("77F66FF5-EFAD-49B7-AFE3-8A1403376CB8", desc, true);
    win.close();
try {
    var desc = app.getCustomOptions("77F66FF5-EFAD-49B7-AFE3-8A1403376CB8");
    win.input_group.input_obj.text = desc.getString(0);
} catch (e) {
    win.input_group.input_obj.text = "predefined value";
win.show();
Cheers,
Davide Barranca
www.davidebarranca.com
www.cs-extensions.com

How to ask for an array and how to save the values

I'm supposed to be learning the differences between a linear search and a binary search, and the assignment is to have a user input an array and search through the array for a given number using both searches. My problem is that I know how to ask them how long they want their array to be, but I don't know how to call the getArray() method to actually ask for the contents of the array.
My code is as follows:
import java.util.Scanner;
import java.util.ArrayList;
public class Main
    private static Scanner input = new Scanner(System.in);
    public static void main (String args[])
        //creates ArrayList
        int List[];
        System.out.println("How long would you like the array to be?");
        int arrayLength = input.nextInt();
        //Initializes array list
        List = new int [arrayLength];
        System.out.println("Please enter the first value of the array");
    public static void getArray(int List[], int arrayLength)
        for(int i=0; i < arrayLength; i++) {
             System.out.println("Enter the next value for array");
             List[i] = input.nextInt();
     public static void printArray(int List[])
         for(int i=0; i < List.length; i++)
             System.out.print(List[i] + " ");
public class search
    public static int binarySearch(int anArray[], int first, int last, int value)
        int index;
        if(first > last) {
            index = -1;
        else {
            int mid = (first + last)/2;
            if(value == anArray[mid]) {
                index = mid; //value found at anArray[mid]
            else if(value < anArray[mid]) {
                //point X
                index = binarySearch(anArray, first, mid-1, value);
            else {
                //point Y
                index = binarySearch(anArray, mid+1, last, value);
            } //end if
        } //end if
        return index;
    //Iterative linear search
    public int linearSearch(int a[], int valueToFind)
        //valueToFind is the number that will be found
        //The function returns the position of the value if found
        //The function returns -1 if valueToFind was not found
        for (int i=0; i<a.length; i++) {
            if (valueToFind == a) {
return i;
return -1;

I made the changes. Two more questions.
1.) Just for curiosity, how would I have referenced those methods (called them)?
2.) How do I call the searches?
import java.util.Scanner;
import java.util.ArrayList;
public class Main
    private static Scanner input = new Scanner(System.in);
    public static void main (String args[])
        //creates ArrayList
        int List[];
        System.out.println("How many values would you like the array to have?");
        int arrayLength = input.nextInt();
        //Initializes array list
        List = new int [arrayLength];
        //Collects the array information
        for(int i=0; i < arrayLength; i++) {
             System.out.println("Enter a value for array");
             List[i] = input.nextInt();
        //Prints the array
        System.out.print("Array: ");
        for(int i=0; i < List.length; i++)
             System.out.print(List[i] + " ");
        //Asks for the value to be searched for
        System.out.println("What value would you like to search for?");
        int temp = input.nextInt();
        System.out.println(search.binarySearch()); //not working
}

How To show infinity value by LabView 8

My teacher is the problem that needs to be in the range -20 <x <20 to the input of random values, so that in each case in each case by the full post (dasd.vi). now this was my problem by changing the input values into the from -infinity <x <infinity is just a random, like him, and to show that it is worth it. The show is the Inf.
It would help me.
It is a project of mine.
Attachments:
dasd.vi ‏17 KB

ToNTi wrote:
I want the value from-infinity to infinity to show that output by the output from the "inf".
Perhaps I'm misunderstanding your question, but I think the problem is in your understanding of the concept of infinity. You can't represent a continuum from -infinity to +infinity in any numbering system (data type). Let me explain what I mean.
Here's how I'd make a number vary from -10 to +10:
I can increase the range by increasing the constant at the multiplication node. You get into trouble when you want to increase the range beyond the limits of the Double data type (+/- 1.79e+308). See, infinity is not a number so you can't perform (sensible) mathematical operations on it.
The best you can do is make a range from -[largest negative number for data type] to +[largest positive number for data type]. And tell your teacher what I've told you.
ToNTi wrote:
My teacher is the problem [...]
I've been there!
Jim
You're entirely bonkers. But I'll tell you a secret. All the best people are. ~ Alice

How to save the value from JTextFormattedField using TAB key in lostFocus

Can you, please help me with this problem:
I want to have saved new value in JTextFormattedField after I use TAB kye.
I tried with focusLost, then setting setFocusTraversalKeys etc.
It looks simple, but !?
Thanks

I also tried the JFormattedTextField for the IPAddress Object which I created but it would't work that well I have a bad experience with these TextFields it showed me the formate 0.0.0.0 but when I entered the text in it, it jumps of after tow digits in each column

SIMPLE BROWSE BUTTON QUES: How to save the value on submit

THis is my file field
<input type="file" name="upic2" value="<%=upic2%>">
If this was a regular field, value="<%=upic2%> would hold the value, but is doesnt work for the browse field. Does anyone know what I am missing.
THanks
Adam

I take it that this will not work and its a limitation of the browse button.

How to save controls value in labview

Similar Messages

Maybe you are looking for