How to retrieve specific data from a text file
Hi, everyone
For my project it is required that a parameter file is read at the beginning, in order for certain variables to be initialized with specific values that change with the user.
At the moment, the way it is done is the following: The values at a specified sequence in a text file are read and saved in an array and the elements of the array are retrieved according to their index.
The problem with this implementation is, that if for some reason the format of the file changes, e.g. we want to use a parameter file from a previous version of the program that has the values for the same variables but in a different order, the only way to have the right values for the parameters is to change everything accordingly, which is really time wasting.
Could someone suggest a different implementation that would make the reading of the different values independent from their order in the file, e.g. by scanning the file for specific strings and reading the value after the string?
Thank you very much.
P.S. I have attached a screenshot of the routine I am using now.
Solved!
Go to Solution.
Attachments:
read parameter file.JPG 180 KB
Hi panagiov,
Find attached Folders.
Method 1: in this you can search for each variable separately. You can use "Config file vis" to get all keys(Variables) at once and then you can use for loop to get their values. Or you can access individual values as shown in this code.
Method 2: here you will get all data at once. You will get Variable and Data (2D array) You need to search variables as and when required.
I hope you will understand these methods.
Best of luck
Gaurav k
CLD Certified !!!!!
Do not forget to Mark solution and to give Kudo if problem is solved.
Attachments:
Method 1.zip 7 KB
Method 2.zip 9 KB
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String tdate = dashdate.format(new java.util.Date());
// String Indentdate = dashdate.format(new java.util.Date());
// String ApprovedT1 = dashdate.format(new java.util.Date());
// String ApprovedT2 = dashdate.format(new java.util.Date());
// String ApprovedT1=" ";
//String ApprovedT2="";*/
String ApprovedT1= dashdate.format(new java.util.Date());
out.println (ApprovedT1);
String ApprovedT2=dashdate.format(new java.util.Date());
out.println(ApprovedT2);
String Indentdate=(dashdate.format(slashdate.parse(request.getParameter("dateindent").trim())));
out.println(Indentdate);
String Cocode ="BML001";
out.println(Cocode);
String Deptcode = request.getParameter("dept1");
out.println(Deptcode);
String Empcode = request.getParameter("emp");
out.println(Empcode);
String Refno =request.getParameter("rtype");
out.println(Refno);
String Divcode = request.getParameter("todiv1");
out.println(Divcode);
String Usercode = "CIRIUS";
String Whcode = request.getParameter("stor");
out.println(Whcode);
// String Itemgroupcode = request.getParameter("");
String Itemgroupcode ="120000";
out.println(Itemgroupcode);
String Supplytypecode = request.getParameter("stype");
out.println(Supplytypecode);
String Delcode = request.getParameter("deliverycode");
out.println(Delcode);
String Itemclass="WS";
out.println(Itemclass);
// String Itemclass = request.getParameter("iclass");
// out.println(Itemclass);
String unitcode = request.getParameter("uni");
out.println(unitcode);
String Todivcode = request.getParameter("todiv1");
out.println(Todivcode);
String Appxrate = request.getParameter("rate");
out.println(Appxrate);
String Srno = request.getParameter("srno");
out.println(Srno);
/* String Indqty = request.getParameter("indentqty");
out.println(Indqty);*/
String Itemcode = request.getParameter("itmcd");
out.println(Itemcode);
String Othersp = request.getParameter("remark1");
out.println(Othersp);
String Reqdt = request.getParameter("dor");
out.println(Reqdt);
String Munitcode = request.getParameter("mcode");
out.println(Munitcode);
String Packqty = request.getParameter("packqty");
out.println(Packqty);
String Packuom = request.getParameter("pack");
out.println(Packuom);
String Remark2 = request.getParameter("remark2");
out.println(Remark2);
String BC = request.getParameter("bcc");
out.println(BC);
String CC = request.getParameter("ccc");
out.println(CC);
try{
st=connection.createStatement();
connection.setAutoCommit(false);
String sql="INSERT INTO PTXNINDHDR(COCODE,DEPTCODE,EMPCODE,APPROVEDT1,APPROVEDT2,INDDT,ENTRYNO,REFNO,REMARKS,DIVCODE,USERCODE,WHCODE,ITEMGROUPCODE,SUPTYPECODE,DELCODE,UNITCODE,TODIVCODE,ITEMCLASS)VALUES('"+Cocode+"','"+Deptcode+"','"+Empcode+"','"+ApprovedT1+"','"+ApprovedT2+"','"+Indentdate+"',"+Entryno+",'"+Refno+"','"+Othersp+"','"+Divcode+"','"+Usercode+"','"+Whcode+"','"+Itemgroupcode+"','"+Supplytypecode+"','"+Delcode+"','"+unitcode+"','"+Todivcode+"','"+Itemclass+"')";
out.println(sql);
st.addBatch(sql);
for(int i=0;i<serials.size();i++){
out.println("Inside the Statement");
String query3="test query for u";
out.println(query3);
String queryx="Insert into PTXNINDDTL(APXRATE,ENTRYNO,BRKNO,INDQTY,ITEMCODE,OTHERSPFCS,MUNITCODE,PACKQTY,PACKUOM,REMARKS,DIMSUBGRPCODE,DIMCODE,REQDT)VALUES("+arate.get(i)+","+entryno+","+srname.get(i)+","+iqnty.get(i)+","+itcode.get(i)+",'"+Othersp+"','"+mucode.get(i)+"',"+pqnty.get(i)+",'"+puom1.get(i)+"','"+remarkss.get(i)+"','"+bcs.get(i)+"','"+ccs.get(i)+"','"+rdate.get(i)+"')";
out.println(queryx);
st.addBatch(queryx);
int[] result=st.executeBatch();
connection.commit();
for(int k=0;k<result.length;k++)
out.println("rows updated by "+(k+1)+"insert sta:"+result[k]+"");
catch(BatchUpdateException bue)
out.println("error1;"+bue+"");
catch(SQLException sql)
out.println("error2;"+sql+"");
catch(Exception l)
out.println("error3;"+l+"");
</html>
Now I looking for to retrieve this footer section data available in multiple rows from footer table and present it in jsp page .
I am finding difficulties in how to show this multiple row data for dynamic no of rows .i.e. variable no. of rows.
I have able to show the data in Header portions of page in this ways
here i am adding the part of code which shows the data from header part of table i.e from Header table
<html>
<h2 align="center"><b>Indent Preparation</b></h2>
<div align="left">
<table width="849" border="0" cellspacing="3" cellpadding="3" align="center">
<tr>
<td ><div align="left"><b>Indent No.</b></div></td>
<td ><label>
<input name="indentno" type="text" id="indentno" size="15" value="" /><input type="hidden" name="no" id="no">
</label></td>
<td ><div align="center"><strong>Indent Date</strong></div></td>
<td ><label>
<div align="center">
<input name="dateindent" type="text" id="dateindent"value="<%=date1%>"/><input type="hidden" name="no" id="no">
</div>
</label></td>
<td> </td>
<td><div align="right"><strong>Entry No.</strong></div></td>
<%if(oper!=null && oper.equals("view") && hdrcode!=null && hdrdetails!=null){%>
<td><input type="text" value="<%=hdrcode.get(3)%>" size="10"></td>
<%}else{%>
<td><input type="text" name="entryno" id="entryno" value="<%=entryNo%>"/></td>
<%}%>
<div align="right"></div>
</tr>
<tr>
<td><b>Division</b></td>
<%if(oper!=null && oper.equals("view") && hdrcode!=null && hdrdetails!=null){%>
<td><input type="text" value="<%=hdrdetails.get(9)%>" size="20"</td>
<td><input type="hidden" name="div1" id="div1" value='<%=hdrcode.get(10)%>'></td>
<%}else{%>
<td><input type="text" name="div" id="div" /></td>
<td><input type="hidden" name="div1" id="div1" /> </td>
<%}%>
<td> </td>
<td> </td>
<td><div align="right"><strong>Unit</strong></div></td>
<%if(oper!=null && oper.equals("view") && hdrcode!=null && hdrdetails!=null){%>
<td><input type="text" value="<%=hdrdetails.get(14)%>" size="20"</td>
<td><input type="hidden" name="uni" id="uni" value='<%=hdrcode.get(12)%>'></td>
<%}else{%>
<td><input type="text" name="unit" id="unit" /></td>
<td><input type="hidden" name="uni" id="uni" /> </td>
<%}%>
</tr>
<tr>
</html>
Any suggestion on any above works is highly appreciated.
Thanks and regards
harshalToo much code. It's also not well intented nor formatted. I don't see a question either or it got lost in that heap of unformatted code.
I will only answer the question in the thread's subject:
How to retrieve multiple data from table and represent it in jsp pageTo retrieve, make use of HttpServletRequest#getParameterValues() and/or #getParameter().
To display, make use of JSTL's c:forEach. -
How to read a tab seperated data from a text file using utl_file
Hi,
How to read a tab seperated data from a text file using utl_file...
I know if we use UTL_FILE.get_line we can read the whole line...but i need to read the tab separated value separately.....
Thanks in advance...
NaveenNaveen Nishad wrote:
How to read a tab seperated data from a text file using utl_file...
I know if we use UTL_FILE.get_line we can read the whole line...but i need to read the tab separated value separately.....If it's a text file then UTL_FILE will only allow you to read it a line at a time. It is then up to you to split that string up (search for split string on this forum for methods) into it's individual components.
If the text file contains a standard structure on each line, i.e. it is a fixed delimited structure, then you could use external tables to read the data instead. -
Hi i am new to labview
I want to extract data from a text file and display it on the front panel.
How do i proceed??
I have attached a file for your brief idea...
Attachments:
extract.jpg 3797 KBRoopeshV wrote:
Hi,
The below code shows how to read from txt file and display in the perticular fields.
Why have you used waveform?
Regards,
Roopesh
There are so many things wrong with this VI, I'm not even sure where to start.
Hard-coding paths that point to your user folder on the block diagram. What if somebody else tries to run it? They'll get an error. What if somebody tries to run this on Windows 7? They'll get an error. What if somebody tries to run this on a Mac or Linux? They'll get an error.
Not using Read From Spreadsheet File.
Use of local variables to populate an array.
Cannot insert values into an empty array.
What if there's a line missing from the text file? Now your data will not line up. Your case structure does handle this.
Also, how does this answer the poster's question? -
How can I read a specific character from a text file?
Hi All!
I would like to read a specific character from a text file, e.g. the 2012th character in a text file with 7034 characters.
How can I do this?
Thanks
Johannesjust use the skip(long) method of the input stream that reads the text file and skip over the desired number of bytes
-
How to parse data from a text file with no convenient delimiters?
I need to read data from a text file. This file contains one line of data with the repeating pattern "time 00 ADVar2: ___ Height: ____ time 01 ADVar2: ___ Height: ___ ..." I need LabView to parse out the "time" and "height" values, build an array with the values, and graph the correlation on an X&Y plot. Does Labview have an automated way to read to the input data file and parse out the correct values, even without convenient delimiters? Thank you.
You actually do have a convenient delimiter: "time". Thus, you can make an array using that as the delimiter. Only caveat is that the first array element will be empty. Then you can conveniently use the Scan From String function in a for-loop. Something like this:
Message Edited by smercurio_fc on 11-21-2008 03:13 PM
Attachments:
Example_VI.png 9 KB
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