HELP!!!! How to read data from a file at time to time?

i store temporary string data in a file(the data changes always), and i need to read the data in the file from time to time, so how can i read from the file like every 5 seconds?

Please i need your help mr. noahw. i have a timer called timer1 inside that timer i am starting a thread to read the data in a file to me, then i have another timer timer 2 in which it takes the data already read from timer 1 and draws them on a GUI. the problem with me is that, i am unable to set a correct time for each of the two timers such that, every time timer one executes that is a new data is generated i need to draw only one figure coreesponding to those data, then when a new set of data is read i need to draw another figure based on the new data read, please help me with this becasue i need it urgently, this is my email, [email protected], and i can offer this reply as many points as you want if this helps you to help me, i am counting on you.

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How to read data from a file that was formatted by excel?

Hi everyone, I'm familiar with java.io and the ability to read from files, can anyone tell me how to read data from a file that was formatted by excel? Or at least give me some web references so that I can learn about it?

http://jakarta.apache.org/poi/hssf/index.html
HSSF stands for Horrible Spreadsheet Format, but it still works!

How to read data from a file in OSB

hi guys,
Recently, I've got a problem with reading file from specific location. I've actually followed this post OSB 11g - Read or Poll File in OSB - Oracle Fusion Middleware Blog, and then
I know how to read a file. However, it does not as expected. Because, I've found no way to read data from the file. Therefore, no chance to manipulate the data like assigning to a variable, or extracting ....
Hence, is there any way to read data from file by using proxy service in OSB ??? No Java code ???
by the way, supposed that there is no way to read data from a file in OSB. So, What purposes will the way in the post above be used for?
Many thanks in advance

http://jakarta.apache.org/poi/hssf/index.html
HSSF stands for Horrible Spreadsheet Format, but it still works!

How to read data from a file from a remote area

Hi,
i have a jsp page, now i need to read & write data from the file, When i run my program then i give the file path is: "c://sample.txt" if user access this page from remote area to read & write data then what will be the file path? Is there anyone who can solve this problem? What will be the solution of this problem? Please help me.
With regards
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FileReader fr = new FileReader("\\\\pcName\\pcName-Share\\web.xml");
System.out.println(fr.read());
fr.close();

How to Read data From Excel File in Labview 8.5?

We can read it from xls file, but it is encrypted..... we need exact data...

i have attached that excel file...i want to extract the full data from that file..how i can read it...when i read by using "Read from spreadsheet file" function, data was in encrypted form....so please send me the correct way...
Attachments:
stn_auto.xls ‏40 KB

How to read data from a file that is already open by another program

Hey..
I have made IV, where I'm trying to read data from a log file, that is being updated by another program while my IV runs.
To be clear, this program writes data continuously to this file and I want to read from the file in LV at the same time.
The problem is that LV reports an error when I'm trying to read the log file, even if I use to "read only" mode.
I believe that the program that is producing the file, have some kind of lock on the file. I have tryed to copy the file and then reading from the copied file, but LV throws already an error when I try to copy the file.
Has anyone tryed this, and found a solution.?
Additional info: The program that produces the file is STM Studio
Best Regards
Allan

Hi Alha,
when that file is locked by the other program you can't do anything about that - apart from quitting that other program. Probably this isn't an option to you…
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

How to read data from a file

I have a file that looks like this with out the *'s
lastName firstName number
lastName firstName number2
lastName firstName number3
lastname = (string) an actual last name like smith same for first name
number = an actual number (int) like 90 or 120
I need to read the number from this file and store it in an array. I have some code that I started, but im not sure what to do next. Please help!
//int searchId;
     int fileData;
     vector <int> employeeIds;
     //cout<<"Enter Employee ID: ";
     //cin>>searchId;
     ifstream dataFile("Small-Database.txt");
     dataFile >> fileData;
     while(!dataFile.eof())
           //this is where i need help, how can i read in a number. i tried using the getLine() function but it did not help
          //employeeIds.push_back(fileData);
          //dataFile >> fileData;
     dataFile.close();Thank you for any help in advance

The >> operator reads a value corresponding to the target type. For example, to read an integer value, read it into an int variable (or long or long long, depending on the integer range).
The >> operator skips white space (blanks, tabs, newlines) and then reads characters corresponding to the target type: digits for an integer value, for example. It stops at the first character that cannot be in the representation of the type. If no characters are read, the stream goes into an error state, and further I/O requests are ignored until you clear the stream state.
You can read each group of data like this:
std::string first, last;
int number;
dataFile >> first >> last >> number;If the data doesn't have the right characteristics, the stream will go into an error state, which you can detect by testing the stream directly:
if( dataFile ) ...Using EOF as the loop control is not a good idea, since if there is an error, the loop will never terminate. You can do something like this:
while( dataFile ) {
    std::string first, last;
    int number;
    dataFile >> first >> last >> number;
    if( dataFile ) {
        // ... add first, last, number to the data structure
} Reading past EOF puts the stream in an error state, so checking the stream state before saving the data and in the loop control will do the trick.
You can use a char array instead of a string for the names, but then you have to add extra testing to be sure you don't overflow the array, and deal with the extra characters you don't read. Strings will expand as needed. The string is declared as a local variable in the loop, so it gets re-initialized each time through; you don't need to write code to reset it.
My example loop is not robust in the face of errors. Stream I/O works fine when you know the input data is well-formed. It is not suited to input that can be wrong, such as data typed from the terminal, because it is not easy to validate the input and recover from errors.

How to read data from txt file respectively

Hi,
I am triying to form an equation between two known points. I want to do this with the attached VI, the most critical point is that I will read the x1, y1, x2 and y2 coordinates from the same .txt file. They will be written in a .txt file and I will send them to the appropriate channel (x1, y1, x2 and y2) respectively. How can I get data in a rule from a .txt file?
Could anyone please help me with this issue,
Best regards.
Attachments:
read from txt file.vi ‏8 KB

Dear RavensFan,
Thank you very much for your helps, I am bit new to labview so I usually can not find the appropriate functions easily. And a new problem has rised in my application. I should write the A, B and C numbers in the respective series to the file 2.txt. I am able to write them in a straight forward case but I want to write the next triples (A B C) in the next row. Like this;
A1 B1 C1
A2 B2 C2
A3 B3 C3
So how can I put new line constant and space constant to my VI?
Waiting for your valuable helps,
Best regards,
Attachments:
read_from_txt_fileMOD.vi ‏18 KB

How to Read data from excel file without converting a excel file into .csv or any other format

Hello,
Can somebody suggest me how to read from an excel file (consisting of 10 work sheets) to an array?
Thanks,
She

You have to be careful when using the spreadsheet-files vi's. They are located in the Functions Palette under File IO, you will find "Write To / Read From Spreadsheet File.vi"s.
Here is what the Context Help says about the vi function:
"Reads a specified number of lines or rows from a numeric text file beginning at a specified character offset and converts the data to a 2D, single-precision array of numbers. You optionally can transpose the array. The VI opens the file before reading from it and closes it afterwards. You can use this VI to read a spreadsheet file saved in text format. This VI calls the Spreadsheet String to Array function to convert the data. "
This is quick & easy when the spreadsheet is all the same format. You can set the format to string as well. HOWEVER... you do have to convert the Excel spreadsheet to text before using it.
I haven't experimented with the Active-X, but it may look as the way to go if you have combination text / numeric values in the spreadsheet.
If you did convert it to text, then you can use array functions as well and treating the file as an array of strings (see very brief example attached). The example is to illustrate a point only
JLV
Attachments:
starting point for spreadsheet.vi ‏28 KB

How to read data from multiple files and append in columns in one file

Hi Guys,
I have a problem in appending data from files in different columns. I have attachement has file A and B which I am reading and not able to get data as in file Result.txt. Please comment on how can I do this
Solved!
Go to Solution.
Attachments:
Write to file.vi ‏13 KB
A.txt.txt ‏1 KB
B.txt.txt ‏1 KB

You cannot append columns to an existing file. Since the data is arrange line-by-line as one long linear string in the file, you can only append rows. A new row needs to be interlaced into the original file, shifting everything else. If you want to append rows, you need to build the entire output structure in memory and then write all at once.
(I also don't think you need to set the file positions, it will be remembered from the last write operation.)
Unless the files are gigantic, here's what I would do:
(Also note that some of your rows have an extra tab at the end. If this is normal, you need a little bit more code to strop out empty columns. I include cleaned up files in the attachment. I also would not call them A.txt.txt etc. A plain A.txt is probably sufficient.)
EDIT: It seems Dennis's solution is similar )
LabVIEW Champion . Do more with less code and in less time .
Attachments:
Write to fileMOD.zip ‏6 KB
MergeColumns.png ‏6 KB

HOW TO READ DATA FROM A FILE AND INSERT INTO A TABLE USING UTL_FILE

Hi..
I have a file.I want to read the data from file and load it into a table using utl_file.
how can I do it?
Any reply apreciated...

Hi,
This is not your requirment but u can try this :
CREATE OR REPLACE DIRECTORY text_file AS 'D:\TEXT_FILE\';
GRANT READ ON DIRECTORY text_file TO fah;
GRANT WRITE ON DIRECTORY text_file TO fah;
DROP TABLE load_a;
CREATE TABLE load_a
(a1 varchar2(20),
a2 varchar2(200))
ORGANIZATION EXTERNAL
(TYPE ORACLE_LOADER
DEFAULT DIRECTORY text_file
ACCESS PARAMETERS
(FIELDS TERMINATED BY ','
LOCATION ('data.txt')
select * from load_a;
CREATE TABLE A AS select * from load_a;
SELECT * FROM A
Regards
Faheem Latif

How to read data from excel file in windows azure cloud service?

I have a web application in visual studio 2010 and windows azure sdk.It asks the user to upload an excel file and then read its data
to the database.When i ran the application on localhost it ran perfectly but when I run it using windows azure sdk emulator (using my application as a web role) it gives the error "The Microsoft.ACE.OLEDB.12.0' provider is not registered on the local
machine".How to resolve this other than using OpenXml?

You can access office documents only if office COM objects (means office) is installed on the machine.
One option is using of Open.XML (why don't you want to use it?) and another option is to use Office365. However the later one would probably change the whole architecture of you application.
One workaround might be to save Excel file as HTML and read it as HTML. This will not give you all of Open.XML and COM power, but you can very easy access and change data.
Damir Dobric
developers.de
daenet.de
daenet.eu
daenet.com

To read data from exel file into sap

hi all,
How to read data from exel file into the internal table in abap?
Regards,
sugeet.

Hi Sugeet,
Use the following code.
DATA : BEGIN OF tbl_asset occurs 0,
         anlkl LIKE anla-anlkl,          " Asset Class
         bukrs LIKE anla-bukrs,          " Company Code
         ranl1 LIKE ra02s-ranl1,         " Asset #
         txt50 LIKE anla-txt50,          " Description 1
         txa50 LIKE anla-txa50,          " Description 2
         sernr LIKE anla-sernr,          " Serial #
         invnr LIKE anla-invnr,          " Inventory #
         menge LIKE anla-menge,          " Quantity
         meins LIKE anla-meins,          " Base UOM
         inken LIKE anla-inken,          " Inventory
END OF tbl_asset.
DATA : w_filename TYPE IBIPPARMS-path,
       w_file     TYPE string.
start-of-selection.
*popup for file path from user
CALL FUNCTION 'F4_FILENAME'
EXPORTING
   PROGRAM_NAME        = SYST-CPROG
   DYNPRO_NUMBER       = SYST-DYNNR
IMPORTING
   FILE_NAME           = w_filename          .
MOVE w_filename TO w_file .
* upload data
CALL FUNCTION 'GUI_UPLOAD'
EXPORTING
    FILENAME                      = w_file
    FILETYPE                      = 'ASC'
    HAS_FIELD_SEPARATOR           = 'X'
TABLES
    DATA_TAB                      = tbl_asset
EXCEPTIONS
   FILE_OPEN_ERROR               = 1
   FILE_READ_ERROR               = 2
   NO_BATCH                      = 3
   GUI_REFUSE_FILETRANSFER       = 4
   INVALID_TYPE                  = 5
   NO_AUTHORITY                  = 6
   UNKNOWN_ERROR                 = 7
   BAD_DATA_FORMAT               = 8
   HEADER_NOT_ALLOWED            = 9
   SEPARATOR_NOT_ALLOWED         = 10
   HEADER_TOO_LONG               = 11
   UNKNOWN_DP_ERROR              = 12
   ACCESS_DENIED                 = 13
   DP_OUT_OF_MEMORY              = 14
   DISK_FULL                     = 15
   DP_TIMEOUT                    = 16
   OTHERS                        = 17
IF SY-SUBRC <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
for HAS_FIELD_SEPARATOR Use
'X': Fields are separated by tabs.
SPACE: Fields are not separated by tabs. In this case, the table must contain only one column or all columns must be contained in the file in their entire length.
Hope it helps...
Lokesh
Pls. reward appropriate points

Read data from xml files and populate internal table

Hi.
How to read data from xml files into internal tables?
Can u tell me the classes and methods to read xml data..
Can u explain it with a sample program...

<pre>DATA itab_accontextdir TYPE TABLE OF ACCONTEXTDIR.
DATA struct_accontextdir LIKE LINE OF itab_accontextdir.
DATA l_o_error TYPE REF TO cx_root.
DATA: filename type string ,
             xmldata type xstring .
DATA: mr      TYPE REF TO if_mr_api.
mr = cl_mime_repository_api=>get_api( ).
mr->get( EXPORTING i_url     = 'SAP/PUBLIC/BC/xml_files_accontext/xml_accontextdir.xml'
              IMPORTING e_content = xmldata ).
WRITE xmldata.
TRY.
CALL TRANSFORMATION id
      SOURCE XML xmldata
      RESULT shiva = itab_accontextdir.
CATCH cx_root INTO l_o_error.
ENDTRY.
LOOP AT itab_accontextdir INTO struct_accontextdir.
    WRITE: / struct_accontextdir-context_id,
           struct_accontextdir-context_name,
           struct_accontextdir-context_type.
    NEW-LINE.
    ENDLOOP.</pre>
<br/>
Description:
In the above code snippet I am storing the data in an xml file(you know xml is used to store and transport data ) called 'xml_accontextdir.xml' that is uploaded into the MIME repository at path 'SAP/PUBLIC/BC/xml_files_accontext/xml_accontextdir.xml'.
The below API is used to read a file in MIME repo and convert it into a string that is stored in ' xmldata'. (This is just a raw data that is got by appending the each line of xml file).
mr = cl_mime_repository_api=>get_api( ).
mr->get( EXPORTING i_url     = 'SAP/PUBLIC/BC/xml_files_accontext/xml_accontextdir.xml'
              IMPORTING e_content = xmldata ).
    Once the 'xmldata' string is available we use the tranformation to parse the xml string that we have got from the above API and convert it into the internal table.
<pre>TRY.
CALL TRANSFORMATION id
      SOURCE XML xmldata
      RESULT shiva = itab_accontextdir.
CATCH cx_root INTO l_o_error.
ENDTRY.</pre>
Here the trasnsformation 'id ' is used to conververt the source xml 'xmldata' to resulting internal table itab_accontextdir, that have same structure as our xml file 'xml_accontextdir.xml'. In the RESULT root of the xml file has to be specified. (In my the root is 'shiva').
Things to be taken care:
One of the major problem that occurs when reading the xml file is 'format not compatible with the internal table' that you are reading into internal table. Iin order to get rid of this issue use one more tranformation to convert the data from the internal table into the xml file.
<pre>TRY.
      CALL TRANSFORMATION id
        SOURCE shiv = t_internal_tab
        RESULT XML xml.
    CATCH cx_root INTO l_o_error.
ENDTRY.
WRITE xml.
NEW-LINE.</pre>
<br/>
This is the same transformation that we used above but the differnce is that the SOURCE and RESULT parameters are changed the source is now the internal table and result is *xml *string. Use xml browser that is available with the ABAP workbench to read the xml string displayed with proper indentation. In this way we get the format of xml file to be used that is compatable with the given internal table.
Thank you, Hope this will help you!!!
Edited by: Shiva Prasad L on Jun 15, 2009 7:30 AM
Edited by: Shiva Prasad L on Jun 15, 2009 11:56 AM
Edited by: Shiva Prasad L on Jun 15, 2009 12:06 PM

Reading data from flat file in aplication server

hi all,
can any body provide code how to read data from flat file which is in application server.
thanks in advance

hi,
chk this sample code.
parameters: p_file like rlgrap-filename obligatory
default '/usr/sap/upload.xls'.
types: begin of t_data,
vbeln like vbap-vbeln,
posnr like vbap-posnr,
matnr like vbap-matnr,
werks like vbap-werks,
megne like vbap-zmeng,
end of t_data.
data: it_data type standard table of t_data,
wa_data type t_data.
open dataset p_file for output in text mode encoding default.
if sy-subrc ne 0.
write:/ 'Unable to open file:', p_file.
else.
do.
read dataset p_file into wa_data.
if sy-subrc ne 0.
exit.
else.
append wa_data to it_data.
endif.
enddo.
close dataset p_file.
endif.
Rgds
Anver

HELP!!!! How to read data from a file at time to time?

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