Write character to files++

Hello,
In the past there was a Vi "Write Characters to File++1" which was returning the actual file name. It seems that this function does not exist anymore !

It was replaced by Write to Text File. You can still access the old VI, though. It's in "LabVIEW 8.x\vi.lib\Utility\file.llb."
I can see how it might be difficult to get the filename that was selected if you leave Write to Text file unwired so the user is prompted. The easiest way around that is to put a File Dialog before you write to the file so that you can see what file was selected.

Similar Messages

为什么我的labview8.6 中没有write character to file.vi 函数

为什么我的labview8.6 中没有write character to file.vi 函数，找不到这个函数可以用什么函数代替呢？代替函数和原函数有什么不同吗？？

这个VI完成什么功能？如果是一个文件写入话，应该是可以自己用底层函数写！
gynui 已写：
为什么我的labview8.6 中没有write character to file.vi 函数，找不到这个函数可以用什么函数代替呢？代替函数和原函数有什么不同吗？？

Write characters to file gives a file not found error

It appears that it generates the error at the open file sub vi, but I have no problem with write to spreadsheet file which uses the same sub vi.
Jim
LV 2013

Sorry to answer with some questions..
Which version of LV are you using?
Does the file that you attempt to write to, exist? Do you specify a filename in your vi?
Otherwise,(in LV7) you will be prompted for a file. If it does not exist, the subvi will create it. If it exists, it will ask if you want to overwrite it.
Experiment with the "Write Character to File" vi by simply connecting a string to it... and run it.
BTW, your file must be closed when you attempt to write to it, otherwise the error is actually from Windows.
If you want to append to an existing file (add to it without deleting the original contents), then wire a TRUE to "Append to file". Of course, your file path should be filled in with an appropriate path & filename. In t
his case, you will not be prompted for a filename. However, you can experiment without providing (wiring) a path & filename, let LV prompt you.
Try this as a starting point. You should not get an error. If you still do, can you write what the error message is?
-enjoy-
JLV

How to write newline character to file using bytes along with content

Hi All,
I need to write headers into the file using byte[]. I am creating the strings of header which will form the different rows in the file. I am new to java and would like to know how to embed new line character so that when the byte[] is written to file headers come in different rows.
like
hrd1:abcd
hdr2:1234
when i embed \n and \r in string and do getBytes() and write it to file, some boxes are written in the file and everything comes into single line.
Please advice me the correct way .
Thanks in advance.
Cheers!!
Puneet

not sure about it, but i was always told that "\r\n" meant "new line" on "lots of documents" whereas "\n" only or "\r" only were meaningless on some type of documents

Rewite file without dialog invoked, using write character.vi

Hi Is there anyone who knows the answer to my problem?
The problem is that:-
I have a file that is generated by write lvm.vi but some of the headers are wrongly written, even though I have used graph's property to correct plotnames.
So I attempt to read lvm file and correct the headers and rewrite the old file. It works but the problem is that dialog is invoked when false bit is applied to write character.vi 's append to file? (new file : F). Is there a way to rewite the file without having dialog invoked?
Your help would be appreciated.
Cheers
regards
Clement

Hi Dennis
Thanks
But there's one I do not understand about lvm files.
In the attached, there are three files namely daq1, modified_daq1 and res1 files and simple read lvm file function.
In daq1.lvm, it is saved by default, it reads ok, Enable the plot legend and see names. In it there are 16 channels and in "comment" cell, it holds AI=16 & RES=0.
I saved this value in comment where another subvi will read it later for correct naming of the plots in the graph. This comment has nothing to do with it. Total of channels is 16
then in res1, it does not read ok. X_Values and others are added to plot names. In it, AI=16 & RES=7. Total of channel is 23
To test it, I modified the daq1 file and saved as modified_daq1.lvm. In it, I changed AI=15 & RES=1. total of Channels remained same. Then i changed Dev0/ai15 to Dev0/res0.
Then It reads correctly.
the res1.lvm don't reveal any errors when i studied on it. There's not much any differences except total of channels.
regards,
Clement
Attachments:
testlvm.zip ‏1425 KB

Labview 9.0: Error 1 occurred at Write To Measurement File

Hi
Our University recently got the latest version of Labview (9.0 32-bit) which I installed today.The labview file I am using (my6008v6.vi) used to work fine with the older version (8.5 i think). My write-to-file VI is enabled at certain time intervals in order to log data. As soon as it is enabled for the second time I get the following error:
Error 1 occurred at Write To Measurement File->Copy of murray6008v6.vi
Possible reason(s):
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.
=========================
NI-488: Command requires GPIB Controller to be Controller-In-Charge.
I made a simple file (simplew2f.vi) to test this, with a button which I can press to enable/disable the writing of data. I am able to start writing data and then stop writing data but as soon as I try resume the writing the same error occurs.
This confuses me greatly since this wasn't a problem using the old version and my Labview knowledge is minimal. Any help would be appreciated.
Attachments:
my6008v6.vi ‏214 KB
simplew2f.vi ‏64 KB

So, which VI are you having problems with? Sounds like both...
Okay... - sigh - where to start....
Well.. Let's start with a few comments.
1. Try to stay away from the Express VI. I know the Marketing guys at NI will not like me for saying so, but I am saying so. They are a nice marketing feature that Grumpy Old Men like myself do not like. They make it easy to write quick code.. And I will limit my comments to that. (It's not your fault.. )
2. The wiring on your diagram is not clear or easy to read. Yes, with additional time and double-clicking each wire I can tell where they are going. However, a rule of thumb, alway wire from Left to Right. Never right to left. And do not run the wires under objects, even the ones you are wiring to.
3. simplew2f.vi: You should put a small delay in the While Loop. I ran it three times and it wrote to the files without error. And yes, I used LV2009.
4. my6008v6.vi: Avoid wiring from the top of the While Loop. At frist, it looked like the data was coming out of the While Loop because the wires went to the left side of all the index node of the Index Array function.
You should set your Browse Option for the file path to "Files or Folders" and "New or existing". I did that and I was not getting the error message you described.
R
Message Edited by Ray.R on 03-03-2010 08:33 AM
Attachments:
pathProperty.PNG ‏13 KB

Write to Text File.vi Output file all but first line start with tab

The attached PNG shows the code used to build up concatenated strings into a string array for the first four lines, thence to a string Array, to Spreadsheet String.vi and, finally, the use of Write to Text File.vi
The lower right corner shows the result loaded into a spreadsheet. Note the 3 blank entries marked by a filled red rectangle. Examination of hidden characters shows there is a tab at the beginning of lines 2, 3 and 4.
There is no tab shown in the code. How do those tabs get there? How do I stop them?
I have tried with the option "Convert EOL" both on and off with no difference.
The Help states that an OS-dependent EOL character is appended to each line. I can't imagine the Windows EOL character includes a tab.
Solved!
Go to Solution.
Attachments:
Tab Mystery.PNG ‏29 KB

wildcatherder wrote:
I am still puzzled as to why those additional tabs were added by Array to Spreadsheet String. I'm holding in my hand a printout of an old LabVIEW 8 program with that construction, which is known to work properly.
Makes complete sense when you look at your code. You build a string, including an end-of-line character, and put that string into an array. Then, when you run it through Array to Spreadsheet String, it puts a tab after every array element, and new line at the end of each row in the array. The first element of your array contains a new line but Array to Spreadsheet String doesn't know about it; it still inserts a tab between that array element and the next one, giving you the tabs.

Write to text file (including spaces/next line) using oracle??

How to write to text file using oracle? And how do I handle spaces/next line? (i was trying to use spaces(ch(32)), however it is just converted into squares in the text file.) thanks!

989873 wrote:
How about tabs?It does not matter what character it is. UTL_FILE deals correctly with any text file. Tabb is CHR(9):
SQL> declare
2       v_file utl_file.file_type;
3       v_total_rec number := 0;
4       v_total_sal number := 0;
5 begin
6      v_file := UTL_FILE.FOPEN('TEMP','TEST.TXT','w');
7      for v_rec in (select * from emp) loop
8        v_total_rec := v_total_rec + 1;
9        v_total_sal := v_total_sal + v_rec.sal;
10        UTL_FILE.PUT_LINE(
11                          v_file,
12                          lpad(v_rec.deptno,2) || chr(9) || rpad(v_rec.ename,14) || chr(9) || to_char(v_rec.sal,'99999D99')
13                         );
14      end loop;
15      UTL_FILE.PUT_LINE(v_file,'Total Salary:' || chr(9) || v_total_sal);
16      UTL_FILE.PUT_LINE(v_file,'Total Records:' || chr(9) || v_total_rec);
17      UTL_FILE.FCLOSE(v_file);
18 end;
19 /
PL/SQL procedure successfully completed.
SQL> declare
2       v_file utl_file.file_type;
3       v_line varchar2(100);
4 begin
5      v_file := UTL_FILE.FOPEN('TEMP','TEST.TXT','r');
6      loop
7        UTL_FILE.GET_LINE(v_file,v_line);
8        DBMS_OUTPUT.PUT_LINE(v_line);
9      end loop;
10    exception
11      when no_data_found
12        then
13          UTL_FILE.FCLOSE(v_file);
14 end;
15 /
20      SMITH              800.00
30      ALLEN             1600.00
30      WARD              1250.00
20      JONES             2975.00
30      MARTIN            1250.00
30      BLAKE             2850.00
10      CLARK             2450.00
20      SCOTT             3000.00
10      KING              5000.00
30      TURNER            1500.00
20      ADAMS             1100.00
30      JAMES              950.00
20      FORD              3000.00
10      MILLER            1300.00
Total Salary:   29025
Total Records: 14
PL/SQL procedure successfully completed.
SQL>SY.

RSEOUT00 failing with "Could not write IDoc to file" TPRI_DEF table

Outbound Idoc processing fail with the following error:
Could not write IDoc to file
Message no. EA299
Diagnosis
The system could not convert data from the data record 000027.
Procedure
Check the port definition of the receiver port.
You can use the "Continue despite conversion error" option to write the IDoc to the file from transaction BD87 with replacement characters.
Short dump indicate that there is a some junk character in th e TPRI_DEF for program SAPLSPRI that it is unable to convert.
I have set the flag on the we21 port to "continue despite conversion error" and that seem to help, but I would like to figure out how to fix the junk characters from coming through from the TPRI_DEF table.
This is what shows up in the short dump after RSEOUT00 is run.
TPRI_DEF                                   / /       : :     00002932
    010GV21            \0\0\0\0\x0006āȂ耀㐱〲\0\0嬇\0ሟ鴂푎眩\x0802儔잏퉓
I do not see any entries for area "GV" in the table, there is one for "GF". which has no user assigned to it and it is of key version 21.
I am not sure if the table is supposed to have an entry with no user assigned?
thank you for looking at this issue .

HI Jurgen,
we have the same issue, chinese charecter is in PO text header. so facing error. If we click unicode format then it works fine as my testing in development.
I just want to knom what is the impact if i clicked directly unicode format ?( with refernce to your reply above " have you set the Unicode format flag directly above in WE21?" )
I doc is going from SAP sytem - (PO information )
Pls adivce..
waiting for your reply..
Thanks in advance

Read and write a .CSV file contains cirillic characters issue

Hi guys,
I am a developer of a web application project which uses Oracle Fusion Middleware technologies. We use JDeveloper 11.1.1.4.0 as development IDE.
I have a requirement to get a .csv file from WLS to application running machine. I used a downloadActinLinsener in front end .jspx in order to do that.
I use OpenCSV library to read and write .csv files.
Here is my code for read and write the .csv file,
public void dwdFile(FacesContext facesContext, OutputStream out) {
System.out.println("started");
String [] nextLine;
try {
FileInputStream fstream1 = new FileInputStream("Downloads/filetoberead.CSV");
DataInputStream in = new DataInputStream(fstream1);
BufferedReader br = new BufferedReader(new InputStreamReader(in,"UTF-8"));
CSVReader reader = new CSVReader(br,'\n');
//CSVReader reader = new CSVReader(new FileReader("Downloads/ACTIVITY_LOG_22-JAN-13.csv"),'\n');
List<String> list=new ArrayList();
while ((nextLine = reader.readNext()) != null) {
if(nextLine !=null){
for(String s:nextLine){
list.add(s);
System.out.println("list size ; "+list.size());
OutputStreamWriter w = new OutputStreamWriter(out, "UTF-8");
CSVWriter writer = new CSVWriter(w, ',','\u0000');
for(int i=0;i<list.size();i++){
System.out.println("list items"+list.get(i));
String[] entries = list.get(i).split(",");
writer.writeNext(entries);
//System.out.println("list items : "+list.get(i));
writer.close();
} catch (IOException e) {
e.printStackTrace();
say the filetoberead.CSV contains following data,
0,22012013,E,E,ASG,,O-0000,O,0000,100
1,111211,LI,0,TABO,B,M002500003593,,,К /БЭ60072715/,КАРТЕНБАЙ
2,07,Balance Free,3
1,383708,LI,0,BDSC,B,НЭ63041374,,,Т /НЭ63041374/,ОТГОНБААТАР
2,07,Balance Free,161
It reads and writes the numbers and english characters correct. All cirillic characters it prints "?" as follows,
0,22012013,E,E,ASG,,O-0000,O,0000,100
1,111211,LI,0,TABO,B,M002500003593,,,? /??60072715/,?????????
2,07,Balance Free,3
1,383708,LI,0,BDSC,B,??63041374,,,? /??63041374/,???????????
2,07,Balance Free,161
can somone please help me to resolve this problem?
Regards !
Sameera

Are you sure that the input file (e.g. "Downloads/filetoberead.CSV") is in UTF-8 character set? You can also check it using some text editor having a view in hex mode. If each Cyrillic character in your input file occupies a single byte (instead of two), then the file is not in UTF-8. Most probably it is in Cyrillic for Windows (CP1251).
If this is the case, you should modify the line
BufferedReader br = new BufferedReader(new InputStreamReader(in,"UTF-8"));toBufferedReader br = new BufferedReader(new InputStreamReader(in,"windows-1251"));Dimitar

Can you write an avi file without using imaq

Just curious if anybody has tried to write an avi file without using imaq vi's? So far I have only found sketchy info on the file format and am looking for some help on the file structure etc. Any references or example avi files with explanations of format would be most helpfull. Thanks in advance -

Absolutely.......
An AVI video file is actually structured in the same way as most Windows media files or RIFF files as they are generically known, thus the description below is applicable to for example WAV files etc.
Thus the file always begins with the four byte code RIFF and continues to use this generic four byte coding known as FOURCC, four-character code or FCC throughout.
There are then specific requirements for each different media content and the sections that must be included to define a valid file structure of the desired meadia type.
Each section or 'CHUNK' is defined by an FCC (RIFF being the first) with facility to include additional FCC's as required. The FCC is followed by a length descriptor and then the data (just for fun the odd CHUNK does not quite fit this very general overview). These chunks then align to even word boundries so padding zeros are often inserted at the end of a CHUNK to make it all nice and neat.
It is a requirement that software that does not recognise an additional custom CHUNK should ignore it, this is very easy as all you have to do is use the length descriptor to 'jump' over the CHUNK concerned.
The following is an example from the 'CLOCK.AVI' found on windows computers for a number of years...
RIFFjB AVI LISTŒ hdrlavih8
Here you can see the RIFF followed by a four byte length descriptor (4 Gigabytes), followed by various sub CHUNKS in this example the sub CHUNK is an AVI (note that it is actually 'AVI ' to conform to the FCC).
So the CHUNK structure looks a bit like this:-
RIFF ('AVI '
LIST ('hdrl'
'avih'()
LIST ('strl'
'strh'()
'strf'()
'strd'()
'strn'()
LIST ('movi'
{SubChunk | LIST ('rec '
SubChunk1
SubChunk2
['idx1']
For more information on all this you need to read the RIFF specification documentation on the MSDN website or on the MSDN Technet materials. Most of the stuff you will immediately locate will refer to the AVI file format as that is where most of the recent effort has been focused.

Block and character special files

What is the difference in semantics between block and character special files on Mac OS X?
In the olden days, character special files were intended for serial character-oriented devices such as teletypes, printers, modems etc. not capable of seeking and block special files were intended for seekable block-oriented devices such as winchester disks etc.
But nowadays, Apple uses /dev/rdisk* as the raw (unbuffered) hard disk device, and it is a character special file, and it is seekable. /dev/disk* on the other hand, is buffered, slower, and a block character special file.
Is there still any semantic difference at any O.S. level between these two kinds of special files, or is it all entirely up to the driver designer and it only effectively provides us with one more bit for the device number?

Hi,
Is there still any semantic difference at any O.S. level between these two kinds of special files
As you write, a block device is bufferd by OS, while a character device is not bufferd by OS (=raw device).
In the olden days, character special files were intended for serial character-oriented devices
Even in olden days, I guess a seekable mass storage had both block and character devices; the latter is for partitioning, disk diagnose, backup, etc. Only block devices can be mounted.
Serial (un-seekable) device can only be a character device, I guess.

How to create and write in a file

Hello Gurus,
I am creating a file based on the date and time and writing into that. But, I am still getting exception error and all. Kindly, please let me know.
thanks for all the help...j
Error:-
C:\Usage\JavaFiles>java filename "abc"
Exception in thread "main" java.io.FileNotFoundException:Detail09-2003-
03:28:04.doc (The system cannot find the file specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:176)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at TowerDetail.main(TowerDetail.java:30)
Code sample:-
import java.io.*;
import java.util.*;
import java.lang.*;
import java.sql.*;
import java.text.*;
public class TowerDetail{
public static void main (String[] args) throws IOException{
String userName = "user";
String passwd = "pwd";
String con_db = "jdbc:odbc:datasource";
String ssn = args[0];
Vector results = new Vector();
Connection con = null;
CallableStatement cstmt = null;
java.util.TimeZone tz = java.util.TimeZone.getTimeZone("EST");
java.util.Date now = new java.util.Date();
DateFormat df = new SimpleDateFormat("MM-dd-yyyy-hh:mm:ss");
df.setTimeZone(tz);
String result = df.format(now);
String fileName = "Detail"+result+".doc";
File inputFile = new File(fileName);
FileOutputStream fos = new FileOutputStream(inputFile);
PrintWriter pw = new PrintWriter(fos);
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}catch (Exception e) {
System.out.println("JDBC Error: "+e.getMessage());
return;
try{
con = DriverManager.getConnection(con_db, userName, passwd);
cstmt = con.prepareCall("{call dbo.sp_usage_detail(?)}");
cstmt.setString(1, ssn.trim());
ResultSet rs = cstmt.executeQuery();
pw.println("Report "+result);
pw.println("------------------------------------------------------------------------------------
while(rs.next()){
.... write in the file...
pw.println("------------------------------------------------------------------------------------
pw.close();
System.out.println("Your file Detail"+result+".doc is ready!!!");
cstmt.close();
con.close();
}catch(SQLException ex){
System.out.println("SQLException: ");
System.out.println(ex.getMessage());
}catch(NullPointerException e){
System.out.println("Null Pointer Exception: ");
System.out.println(e.getMessage());

Now, I got out of the command prompt and reentered. I didn't set any classpath or anything. I have created a subdir \archive in the C:\ and writing an output file [DetailTower.....doc")into that.
The DetailTower.class is in C:\Detail\ProjectClass dirctory.
Now at,
C:\Detail\ProjectClass\java -classpath . DetailTower "abc"
I am getting this error:-
C:\Detail\ProjectClass>java -classpath . DetailTower "999999"
Exception in thread "main" java.io.FileNotFoundException: c:\archive\DetailTower09-10-2003-06:23:40.doc (The system cannot find the file specified)at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:176)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
        at Detail.main(DetailTower.java:32)

Write to spreadsheet file.vi is storing data in one row only.

The 8 points of data is going into one column in the spreadsheet. In the "Write to spreadsheet file string.vi" how do I write the 8 points to one row for each cycle?
I got this VI from NI's web a couple of years ago and forgot how to modify this part. I usume it is within the write file.vi.
Thank you in advance
Skip

I just reread your original post and the way the "Write to Spreadsheet File.vi" that ships with LV works by default is to put 1D arrays into rows. I read your post backwards and told you how to put the data in a column. Sorry.
In any case, perhaps you need to make sure the Transpose input ISN'T true, and that the delimiter IS a tab.
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

How can I read, millions of records and write as *.csv file

I have to return some set of columns values(based on current date) from the database (could be million of record also) The dbms_output can accomodate only 20000 records. (I am retrieving thru a procedure using cursor).
I should write these values to a file with extn .csv (comma separated file) I thought of using a utl_file. But I heard there is some restriction on the number of records even in utl_file.
If so, what is the restriction. Is there any other way I can achive it? (BLOB or CLOB ??).
Please help me in solving this problem.
I have to write to .csv file, the values from the cursor I have concatinated with "," and now its returning the value to the screen (using dbms_output, temporarily) I have to redirect the output to .csv
and the .csv should be in some physical directory and I have to upload(ftp) the file from the directory to the website.
Please help me out.

Jimmy,
Make sure that utl_file is properly installed, make sure that the utl_file_dir parameter is set in the init.ora file and that the database has been re-started so that it will take effect, make sure that you have sufficient privileges granted directly, not through roles, including privileges to the file and directory that you are trying to write to, add the exception block below to your procedure to narrow down the source of the exception, then test again. If you still get an error, please post a cut and paste of the exact code that you run and any messages that you received.
exception
    when utl_file.invalid_path then
        raise_application_error(-20001,
       'INVALID_PATH: File location or filename was invalid.');
    when utl_file.invalid_mode then
        raise_application_error(-20002,
      'INVALID_MODE: The open_mode parameter in FOPEN was
       invalid.');
    when utl_file.invalid_filehandle then
        raise_application_error(-20002,
        'INVALID_FILEHANDLE: The file handle was invalid.');
    when utl_file.invalid_operation then
        raise_application_error(-20003,
       'INVALID_OPERATION: The file could not be opened or
        operated on as requested.');
    when utl_file.read_error then
        raise_application_error(-20004,
       'READ_ERROR: An operating system error occurred during
        the read operation.');
    when utl_file.write_error then
        raise_application_error(-20005,
            'WRITE_ERROR: An operating system error occurred
             during the write operation.');
    when utl_file.internal_error then
        raise_application_error(-20006,
            'INTERNAL_ERROR: An unspecified error in PL/SQL.');

Write character to files++

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