Delete multiple rows from text file
HI,
i have a text file and i want to remove first few rows from that text file not last rows.
how can i do that ?
thanks
because i suspect this is a homework assignment i'm not going to give you the fish, but i will teach you how to fish! =P
go investigate the Java Standard class called: BufferedReader. Look specifically at the method readLine()
combine that with a for loop, and an IF-THEN statement to weed out the lines you don't want (or just govern that with the FOR loop's index), and you should be able to figure it out....
good luck! give it a whirl...
Similar Messages
-
Deleting Multiple Rows From Multiple Tables As an APEX Process
Hi There,
I'm interesting in hearing best practice approaches for deleting multiple rows from multiple tables from a single button click in an APEX application. I'm using 3.0.1.008
On my APEX page I have a Select list displaying all the Payments made and a user can view individual payments by selecting a Payment from the Select List (individual items are displayed below using Text Field (Disabled, saves state) items with a source of Database Column).
A Payment is to be deleted by selecting a custom image (Delete Payments Button) displayed in a Vertical Images List on the same page. The Target is set as the same page and I gave the Request a name of DELETEPAY.
What I tried to implement was creating a Conditional Process On Submit - After Computations and Validations that has a source of a PL/SQL anonymous block as follows:
BEGIN
UPDATE tblDebitNotes d
SET d.Paid = 0
WHERE 1=1
AND d.DebitNoteID = :P7_DEBITNOTEID;
INSERT INTO tblDeletedPayments
( PaymentID,
DebitNoteID,
Amount,
Date_A,
SupplierRef,
Description
VALUES
( :P7_PAYMENTID,
:P7_DEBITNOTEID,
:P7_PAID,
SYSDATE,
:P7_SUPPLIERREF,
:P7_DESCRIPTION
DELETE FROM tblPayments
WHERE 1=1
AND PaymentID = :P7_PAYMENTID;
END;
The Condition Type used was Request = Expression 1 where Expression 1 had a value of DELETEPAY
However this process is not doing anything!! Any insights greatly appreciated.
Many thanks,
Gary....the "button" is using a page level Target,...
I'm not sure what that means. If the target is specified in the definition of a list item, then clicking on the image will simply redirect to that URL. You must cause the page to be submitted instead, perhaps by making the URL a reference to the javaScript doSubmit function that is part of the standard library shipped with Application Express. Take a look at a Standard Tab on a sample application and see how it submits the page using doSubmit() and emulate that.
Scott -
How to delete multiple rows from ADF table
How to delete multiple rows from ADF table
Hi,
best practices when deleting multiple rows is to do this on the business service, not the view layer for performance reasons. When you selected the rows to delete and press submit, then in a managed bean you access thetable instance (put a reference to a managed bean from the table "binding" property") and call getSeletedRowKeys. In JDeveloper 11g, ADF Faces returns the RowKeySet as a Set of List, where each list conatins the server side row key (e.g. oracle.jbo.Key) if you use ADF BC. Then you create a List (ArrayList) with this keys in it and call a method exposed on the business service (through a method activity in ADF) and pass the list as an argument. On the server side you then access the View Object that holds the data and find the row to delte by the keys in the list
Example 134 here: http://blogs.oracle.com/smuenchadf/examples/#134 provides you with the code
Frank -
Best practice for deleting multiple rows from a table , using creator
Hi
Thank you for reading my post.
what is best practive for deleting multiple rows from a table using rowSet ?
for example how i can execute something like
delete from table1 where field1= ? and field2 =?
Thank youHi,
Please go through the AppModel application which is available at: http://developers.sun.com/prodtech/javatools/jscreator/reference/codesamples/sampleapps.html
The OnePage Table Based example shows exactly how to use deleting multiple rows from a datatable...
Hope this helps.
Thanks,
RK. -
Deleting multiple rows from SUD dialog table
Hi,
I have some SUD dialog tables that I would like to delete some rows from. I can select and delete all or one row (using a SUD button that finds out which one row was selected or if all, and then deleting them with the table.rows.remove command), but I seem to have troubles if I want to select multiple rows (either in a range, ex: rows 3-10, or non-sequential, ex: 1, 4, 6 and 23). I just started working on this but thought maybe someone has already done this and can save me the trouble!
Thanks!
Julia MoellerHi Julia,
Just a quick guess-- try looping backwards and deleting the last rows first:
FOR i = 10 TO 3 Step -1
table.rows.remove i
NEXT
Haven't tested it, so no guarantees,
Brad Turpin
DIAdem Product Support Engineer
National Instruments -
DELETE MULTIPLE ROWS FROM MATRIX
Hi all,
I´M DESPERATED.
I am able to delete row by row in my matrix, but ¿Could anyone post a sample to delete multiple rows?
I´ve been trying several ways but it doesn´t work.
My code is:
========================
Dim i As Long = oMatrix.GetNextSelectedRow
If i > -1 Then
If oMatrix.IsRowSelected(i) = True Then
oMatrix.DeleteRow(i)
End If
========================
Thank you in advanced,
lorenzoDon´t worry, It was a problem with my loop.
Thanks anyway
lorenzo -
Delete multiple rows from table/list control
Hi,
I want to have a table control in which a user can enter different entries, like this:
My program would read each entry at a time and do something.
However, I would like to give the user ability to delete multiple entries at once, like in an Excel spreadsheet - that is, the user selects multiple rows and presses "Delete" key and those entries get deleted. The Labview table does not allow this it seems - I can only delete one entry at a time - or I have to right-click and select Data Operations->Cut Data, which is awkward.
Is there a control better suited to what I want to do? I tried a Llist control, but it behaves in the same manner.
Thanks in advance!
Solved!
Go to Solution.You could write your own routine. Use an Event Structure with a Key Down event. If the delete key was pressed and the table has focus delete the elements that are selected.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines -
How do I delete multiple rows from datagrid?
Hi,
I have a datagrid which has an item renderer on the 1st column which displays a checkbox. I wish to delete all the rows of data from my datagrid which have the checkbox selected.
I'd be very grateful if anyone can anyone help me with this.
Thanks in advance,
XanderTest this:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()" layout="vertical" xmlns:components="components.*">
<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
[Bindable]
private var dp:ArrayCollection;
private function init():void
var sa:Array = [{selected: false, value: "Some value"}, {selected: true, value: "Some other value"}];
dp = new ArrayCollection(sa);
private function handleDelete():void
var na:Array = dp.source.filter(function callback(item:*, index:int, array:Array):Boolean
return item.selected == false;
dp.source = na;
]]>
</mx:Script>
<mx:DataGrid dataProvider="{dp}">
<mx:columns>
<mx:DataGridColumn headerText="Column 1" dataField="selected">
<mx:itemRenderer>
<mx:Component>
<mx:CheckBox selected="{data.selected}" click="data.selected = event.target.selected"/>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="Column 2" dataField="value"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="Delete selected" click="handleDelete()"/>
</mx:Application>
Dany -
Deleting multiple rows from a JTable.
When I am selecting the rows & deleting rows, it gives errors like arrayIndex out Of Bounds exception.
Anyone pls solve the problem.bookmark the search page
http://onesearch.sun.com/search/developers/index.jsp?charset=UTF-8&and=JTable+delete+row&nh=10&phr=&qt=¬=&field=&since=&col=devforums&rf=0 -
Use Preparedstatement to delete several rows from database
Hello everyone,
I am trying to delete multiple rows from database at one time using Preparedstatement.
It works well when I tried in SQL directly,the sql query is as follows:
delete from planners_offices where planner ='somename' and office in ( 'officeone', 'officetwo', 'officethree')
I want to delete those 3 rows at one time.
But when I am using preparedstatement to implement this function, it does not work. It did not throw any exception, but just does not work for me, the updated rows value always returns "0".
Here is my simplified code:
PreparedStatement ps = null;
sqlStr = " delete from PLANNERS_OFFICES where planner = ? and office in (?) "
Connection con = this.getConnection(dbname);
try
//set the sql statement into the preparedstatement
ps = con.prepareStatement(sqlStr);
ps.setString(1,"somename");
ps.setString(2,"'officeone','officetwo','officethree'");
int rowsUpdated =ps.executeUpdate();
System.out.println(rowsUpdated);
//catch exception
catch (SQLException e)
System.out.println("SQL Error: " + sqlStr);
e.printStackTrace();
catch (Exception e) {
e.printStackTrace();
} finally {
this.releaseConnection(dbname, con);
try{
ps.close();
}catch (SQLException e){
e.printStackTrace();
rowsUpdated always give me "0".
I tried only delete one record at one time, "ps.setString(2, "officeone");", it works fine.
I am guessing the second value I want to bind to the preparedstatement is not right, I tried several formats of that string, it does not work either.
Can anyone give me a clue?
Thanks in advance !
Rachelthe setString function in a preparedStatement doesn't just do a replace with the question mark. It is doing some internal mumbojumbo(technical term) to assign your variable to the ?.
If you are looking to do your statement, then you will need to put in the correct of # of question marks as you need for the in clause.
delete from PLANNERS_OFFICES WHERE PLANNER = ? and office in (?,?,?)
If you need to allow for one or more parameters in your in clause, then you will need to build your SQL dynamically before creating your prepared statement.
ArrayList listOfOfficesToDelete ;
StringBuffer buffer = new StringBuffer("DELETE FROM PLANNERS_OFFICES WHERE PLANNER = ? AND OFFICE IN (");
for(int i = 0; i < listOfOfficesToDelete.size(); i++ )
if( i != 0 )
buffer.append(",");
buffer.append("?");
buffer.append(")");
cursor = conn.prepareStatement( buffer.toString() );
cursor.setString(1, plannerObj);
for(int i = 0; i < listOfOfficesToDelete().size(); i++ )
cursor.setString(i+1, listOfOfficesToDelete.get(i) );
cursor.executeUpdate() ; -
Read words from text file by delimiter as columns and rows
Hi All,
I need your help as i have a problem with reading string by delimiter. i have used various tech in java, but i can not get the result as expected.
Please help me to get the string from text file and write into excel . i have used a text file.
problem
get the below as string by delimiter
OI.ID||'|'||OI.IDSIEBEL||'|'||OI.IDTGU||'|'||OI.WORKTYPE||'|'||OI.UTR_FK
read the below as string by delimiter
"50381|TEST_7.15.2.2|09913043548|Attivazione|07-SEP-10
now i need to write the above into excel file as columns and rows.
there are 5 columns and each corresponding values
the outut excel should be
OI.ID OI.IDSIEBEL OI.IDSIEBEL OI.WORKTYPE OI.UTR_FK
50381 TEST_7.15.2.2 09913043548 Attivazione 07-SEP-10
i tried in diffrerent techinq but not able to get the resule. pls help me
Thanks,
Jasmin
Edited by: user13836688 on Jan 22, 2011 8:13 PMFirst of all, when posting code, put it between two tags.
Second of all, the pipe is a special character in regex, so you need to escape it as
.split("\ \|");
Erh. So 2 backslashes before the pipe character. Stupid forum won't post it.
Edited by: Kayaman on Jan 24, 2011 9:35 AM
Edited by: Kayaman on Jan 24, 2011 9:35 AM
Edited by: Kayaman on Jan 24, 2011 9:36 AM -
I deleted multiple responses from my FormCentral that had file attachments - anyway to get those back?
Thanks for the reply Michael. Here is more detailed info.
Over time, I copied CDs into itunes with my old laptop and synced them with my iphone. That laptop died so I now have a new PC where I set it to manually manage music.
I had my 'copied from CDs' songs together with 'purchased directly from iphone / itunes' songs on my iphone. I also had playlists on the phone containing a mix of this music.
I thought by activating Match, all my music contained on my iphone would be copied to the cloud. That didn't happen.
Now I have lost all my music from CDs off my phone, along with all my playlists.
The strange thing is when I connect my iphone to the PC that is set to manually manage music, I can see those lost playlists and those lost songs in the playlists, however when I click on the song I get the exclimation point.
Are the song files stored somewhere on my phone or PC? Is there anyway to get that music back?
Thanks for your help. -
"Import from Text File" & "Upload from Clipboard" icon not appearng in F110
Hi Experts,
While making the payment to the vendors through TN F110, in "PARAMETER" screen just next to 'STATUS' screen, there is a vendor field for selection in range and just ahead of this there is an icon for multiple vendor selection ( Bold arrow mark ). If I click on that multiple vender selection icon ( on bold arrow mark ), an another screen opens for multiple selection for vendors. In this screen 'Enter, Copy, Delete etc' icons are appearing at the bottom of the screen but "Import from Text File" & "Upload from Clipboard" icon are not appearing there.
Can you please let me know how to bring that icons there?
Points would be awarded.
Rgds,
ShaileshHi Ravi,
I have not yet created anything and have just entered the parameter. In the multiple screen for vendors there are 5 fields for individual and 5 for range selection. Even you can put more than five range selections or individual selections by clicking on the page button but there I am not finding these two icons.
Can you please check at your end and let me know if you are getting or what to do to bring those two icons in F110.
Rgds,
Shailesh -
Regarding ssis - Filter first 5 rows from flat file
Hi,
i have a requirement like this every day we receive 10-15 Flat files , we need to load these data into SQL Table ,here nothing is complex for this we need to use foreachloop Container,Dataflowtask..etc. here the issue is each flat file have top 5 rows has
Client information like ( We need to delete First 5 rows) and then insert into SQL Table . please suggest me how to develope the package..You need to use a script task to read file one by one and remove the first 5 rows from the file. The file name/path can be stored as a variable and read it from the script code. Insert the script task inside the foreach loop container just before importing
the file.
Refer the link to remove a line in .net
http://stackoverflow.com/questions/7008542/removing-the-first-line-of-a-text-file-in-c-sharp
Regards, RSingh -
(261936172) Q DBC Multiple rows from Database Control method?
Q<DBC> Can you give an example of returning multiple rows from a database?
A<DBC> A Database Control method can return multiple rows.
Assuming the SQL for the method can return multiple rows from
the database, what does the method return? It may return an
Array of Objects*, an Iterator (on a Collection of Objects*)
or a java.sql.ResultSet.
Attached is code that gives an example of returning multiple
rows (not the entire files, but text from them).
* the Objects are either user defined or a HashMap
[rows.txt]hi Keshav,
Earlier i was using same variable SEL in internal table and as a selection column as well. In that case, it was marking SEL as 'X' even when document was selected.
Today, i tried making selection column name as 'MARK' and internal table field name as 'SEL', it is working fine. I am able to read table control lines where MARK equals 'X'.
[http://www.sapdev.co.uk/dialog/tabcontrol/tc_mark.htm]
I followed this link provided by you. Its really useful. Thanks for your help.
Thanks to others as well.
Thanks,
Archana
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