Reading the data from a fichierXML

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• How to read the data from a channel named in windows using labview

  Hello

  I need to read the channel named in windows data. The pipe is created by python by another application. This application post permanent data on the pipe. But I don't know how to read data using labview. is it possible to read the data from different application? If possible, how to start?

  Thanks in advance

  concerning

  RJ

  Hi Rolf,.

  It's just, because of driving is not initialized completely, pipe read returns error 42, I added 2 seconds late, then its work perfect.

  Thank you very much.

  Concerning

  RJ

• Select the list box file and read the data from file

  I can list the files in the folder in the listbox

  1. I want to just list file .txt files

  2. How can I read data from the selected file (.txt)?

  I think that's what you want, enter a model in your list of files vi (for example, *.txt) and then just use File.vi text of reading by using the selected item in the list box (double click on event or value change) and use the starting for the vi records list path.  I have included a crude extract for your pleasure.

• Reading the data from an Excel file

  Hello

  I try to use the attached VI (adapted from an example provided by someone else in a different thread) to read an Excel file.

  It works well, aside from the fact that it leaves the file and Excel opened when it has finished running.

  How do I close the file (and Excel) by programming?

  Thank you very much

  Dan

  Try this.

• Reading the data from the XML file to the SQL Tables.

  I have XML of this type
  
  < empdept >
  < employees_marks >
  < emp_id > 1 < / emp_id >
  BUS from < DIVISION_ID > < / DIVISION_ID >
  PRE < JOB_ID > < / JOB_ID >
  SMITH of < first-name > < / name >
  JAMES < LAST_NAME > < / LAST_NAME >
  < > 10000 salary < / salary >
  < / employees_marks >
  
  < dept >
  < dept_details >
  < deptid > 10 < / deptid >
  < deptname > mechanical < / deptname >
  < / dept_details >
  < dept_details >
  < deptid > 20 < / deptid >
  < deptname > civilian < / deptname >
  < / dept_details >
  < dept_details >
  < deptid > 30 < / deptid >
  < deptname > ICE < / deptname >
  < / dept_details >
  < / dept >
  ((< / empdept > '));
  
  With the above format am able to recover data successfully to relational tables.
  
  
  < employees_marks emp_id = 1 DIVISION_ID = BUS JOB_ID = salary PRE = 10000 / >
  
  
  < dept_details deptid = 10 deptname = "Mechanical" / >
  < dept_details deptid = 20 deptname = "ECE" / >
  < dept_details deptid = 30 deptname = "EEE" / >
  
  that is, I have data as attributes rather than elements, if can I know the way how can I reach the requirement.
  
  How to recover data when it is present as attributes rather than elements.
  
  Thank you
  Sunil. N

  with temp as (
    select xmltype('') tempxml from dual
  )
   SELECT extractvalue(tempxml,'/employees_marks/@emp_id') empid,
    extractvalue(tempxml,'/employees_marks/@DIVISION_ID') divid ,
    extractvalue(tempxml,'/employees_marks/@JOB_ID') jobid      ,
    extractvalue(tempxml,'/employees_marks/@salary') sal
     FROM temp
  

  Do you need this?

  Ravi Kumar

• reading the data from an object

  I know how to do something like that to show an ID value:

  My $basevm_view = Vim::find_entity_view (view_type = & gt; 'VirtualMachine', filter = & gt; {'name' = & gt; "myguestvmname"});

  Print "my ID =". "." $basevm_view - & gt; Summary - & gt; config - & gt; ID. "\n";

  Can I get the ID using the accessor method? If so, what is the snippet of perl code that prove? I'm trying to understand what all of the accessor methods are for, so if they are not for this sort of thing, a quick explanation would really help this newby.

  Thank you.

  As has been pointed out by William, it is not really of accessor methods directly and as you have discovered, the object is exposed as a series of nested, anonymous hashes.

  You can create a utility function if you want a cleaner accessor.  It's probably a good idea since you can create exceptions in there and avoid a lot of messy test code in your branch of the main logic.

  Something like the following would be a good starting point:

  #!/usr/bin/perl
  
  use strict;
  use warnings;
  
  use VMware::VIRuntime;
  
  Opts::parse();
  Opts::validate();
  
  Util::connect();
  
  my ($host_views);                                   
  
  $host_views = Vim::find_entity_views( view_type => "HostSystem",
                                                );
  
  foreach ( @{$host_views} ) {
       print "summary.config.name = " . get_value($_, "summary.config.name") . "\n";
       print "summary.managementServerIp = " . get_value($_, "summary.managementServerIp") . "\n";
       print "summary.bogusProperty = " . get_value($_, "summary.bogusProperty") . "\n";
  }
  
  sub get_value {
       my ($entity, $value_path) = @_;
  
       my @keys = split(/\./, $value_path);
  
       my $key_ref = $entity;
       foreach my $key ( @keys ) {
            eval {
                 $key_ref = $key_ref->{$key};
            };
            if ($@ || not(defined($key_ref)) ) {
                 return '';
            }
       }
  
       return $key_ref;
  }
  

  Example of output:

  summary.config.name = vlab-esx-01.vlab.local
  summary.managementServerIp =
  summary.bogusProperty =
  

  That function will catch at least undefined properties (not all the properties of the SDK are guaranteed and access them may throw an exception).  To do this, he makes an empty string to avoid warnings from perl on indefinite concatenations.

  Keep in mind if you are using the properties-online arguments appointed for your find_entity_view calls, you will need to access the properties as a full key path.  By example, if requested just 'summary.config.name' in such a manner, you acceding it starting from the host as object $_-> {'summary.config.name'}.

  You could easily improve the fortune above accessor method to check this possibility (I just eval the full path key, if that throws an exception, go through the list of keys as usual).

  It might help if you find a little frustrating to work with long anonymous hash references, nested.  I know I find it's ugly when I have to deal with many nested hash refs and validate each in the string is not undefined (destroyed by the SDK return).  I use similar accessor methods to avoid my code getting ugly for more complicated work of perl.

• Reading the data from a Web service

  Hi all

  I have a webservice that returns the square of the number.

  
  

  < s0:ZJK_FLEX_TEST.Response xmlns:s0 = 
  "urn:sap-com:document:sap:rfc:functions" 
  xmlns:SOAP - ENC = 
  "http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
    
  <DATA1>0000016</DATA1>
  </s0:ZJK_FLEX_TEST.Response>
  
  

  the data1 contains the value.

  
  

  but I am not able to set this value in the text field in the flex.

  function() {return A.apply (null, [this] .concat ($A (arguments)))}
  
  

  public void result_getAll(event:ResultEvent):void

  {

  Alert.Show (Event.Result.ToString ());

  Here, I would like to put the value in the text field.

  }

  What do you see with this:

  Alert.Show (Event.Result.ToString ());

  What happens if you do the following:

  Alert.Show (Event.Result.Data1.ToString ());

  If this post answers your question or assistance, please mark it as such.

  Greg Lafrance - Flex 2 and 3 certified ACE

  www.ChikaraDev.com

  Support services and training, tutoring, Contracting, Flex

• reads the data when I select run

  When I insist on running my program reads the data from the meter power... when I'm not it gives me an error. I tried to put right waiting them etc and nothing seems to be set. Also, when I take the vi that read data from the electricity meter, the code runs much faster. I don't know if this has to do with global variables or what, but I just change a code supplied with this unit and it included global variables. I tried not to play with those yet. Anyway, if someone sees something that would eventually cure this problem please let me know. Thank you.

  
  

• How to read the data file

  Hello
  I have red the DBW do that beside Scripture, is that correct?
  
  Thank you

  Jin

  DBWR writing data in data file... hope that the server process reads the data from the data file...

  Kind regards
  Deepak

• What pins to use to receive the data from the PDS ELITE RS485 with the PXI-8431/2?

  Hello!

  I use the PXI-8431/2 to read data from the flow meter PDS ELITE (Modbus RTU). Receiving data, the RS485 protocol request to terminals 4 and 5, but this configuration does not seem to work. When I connect the RS-485 converter USB of Microflex I get the data correctly, so somehow between the PIN lay and PXI this problem there.

  Can someone help me?

  See you soon,.

  Steven

  Hello Steven,

  I think that what was Hossein trying to send you is the following:

  How to connect and configure a device with RS-485 2-wire

  Can you also tell me a little more what you use to read the data? What environment. You have 2-wire or 4-wire Modbus RTU?

  Kind regards

• delay in reading the data when you are using multiple loops clocked on target RT

  Hello

  I have five loops clocked on a target of RT and I communicate to and from the host vi. All the loops of the value of the different priorities however when all running at the same time I found windows vi take up to 1 minute before reading the data. Four disabling loops to fix the problem. It is possible to start the app right after start windows vi?

  Kind regards

  Solved the problem by disabling variable autodeploy

  Thank you

• PowerVault MD1000: Attached directly slow to copy the data from storage.

  Hi all

  I have a powervault MD1000 attached to a PE2900 using scsi. When I write for the PV everything is ok, but when I want to read it, for example copying the data from it, he grinds the server stops and usually falls!

  can someone advice could be what the problem?

  
  

• How to read the data in a device connected to the usb port

  Is there a class or object, or the piece of code in Java that is comparable to the PDQComm32.ocx and the mscomm32.ocx used in VB6? I need to know how to read the data of a device plugged into the usb port of the BBerry. Is it possible to use the BB to read data from a device via a usb cable?

  I'm new in Java and I'm looking for the opportunity to write a project to read the data in a device with this program that can turn on a BB instead of on a pc.

  Thank you

  Did you watch net.rim.device.api.system.USBPort?

  That's what the doc says:

  Provides access to the USB port of the device.

  Avoid using this class in applications, as it is not portable. On the contrary, if you need to access the USB port, use factory CLDC Connector to serve a connection.

  Rab

• How to read the data written to the virtual disk

  I use the following VDDK function to read the Flash disk from VMware

  http://bigchainring.kicks-ass.NET/functions/VixDiskLib_Read.html

  But areas of complete disc playback, including empty spaces. I need to back up only the data written to the Flash disk. It is to save the backup disk space (for example if 126 instant KB is written in 40 GB of disk snapshot, then we read only 126 KB and not 40 GB drive). Please suggest the correct way to read the data written to the Flash disk as well as to reproduce the same virtual disk with the data.

  VMware vSphere API queryChangedDiskAreas() can be used to obtain the data blocks in the virtual disk.

  Steps to follow:

  1. get the beaches of block of data (numbers) using queryChangedDiskAreas() API with '*' as argument.

  2 read the data of the specific blocks by using VixDiskLib_Read()

  3. write to another drive using VixDiskLib_Write()

• How to read the data with different XML schemas within the unique connection?

  • I have Oracle database 11g
  • I access it via JDBC: Slim, version 11.2.0.3, same as xdb.
  • I have several tables, each has an XMLType column, all based on patterns.
  • There are three XML schemas different registered in the DB
  • Maybe I need to read the XML data in multiple tables.
  • If all the XMLTypes have the same XML schema, there is no problem,
  • If patterns are different, the second reading will throw BindXMLException.
  • If I reset the connection between the readings of the XMLType column with different schemas, it works.

  The question is: How can I configure the driver, or the connection to be able to read the data with different XML schemas without resetting the connection (which is expensive).

  Code to get data from XMLType is the implementation of case study:

   1   ResultSet resultSet = statement.executeQuery( sql ) ; 
   2   String result = null ; 
   3    while(resultSet.next()) { 
   4   SQLXML sqlxml = resultSet.getSQLXML(1) ; 
   5   result = sqlxml.getString() ; 
   6   sqlxml.free(); 
   7   } 
   8   resultSet.close(); 
   9    return result ; 
  

  It turns out, that I needed to serialize the XML on the server and read it as BLOB. Like this:

   1    final Statement statement = connection.createStatement() ;  2    final String sql = String.format("select xmlserialize(content xml_content_column as blob encoding 'UTF-8') from %s where key='%s'", table, key ) ;  3   ResultSet resultSet = statement.executeQuery( sql ) ;  4   String result = null ;  5    while(resultSet.next()) {  6   Blob blob = resultSet.getBlob( 1 );  7   InputStream inputStream = blob.getBinaryStream();  8   result = new Scanner( inputStream ).useDelimiter( "\\A" ).next();  9   inputStream.close(); 10   blob.free(); 11   } 12   resultSet.close(); 13   statement.close(); 14  15   System.out.println( result ); 16    return result ; 17
  

  Then it works. Still, can't get it work with XMLType in resultset. On the customer XML unwrapping explodes trying to pass to another XML schema. JDBC/XDB problem?