Problem while populating data from database dynamically.

I am having two combo box
First one displays list of table Names
Second one displays list of the corresponding field Names.
Now when the user selects the table name the corresponding field names appear in the second combo box & now when the user selects the field name then the requirement is to get the data of the corressponding field of the table on the screen on the button click.
I want to do this thing dynamically through coding.
My requirement is only the data of those columns that have been queried should appear on the screen whereas other column data should not appear.
Can any body help me out.

I'm not sure if you want to populate the combobox dynamically based on any selected data source.
If so it is kind of tricky, but do-able. You need to write little bit of coding yourself.
First you need to get the Database metadata. For details see
http://java.sun.com/j2se/1.4.2/docs/api/java/sql/DatabaseMetaData.html
where you can get the table names.
Then using the result set metadata of the selected table you can get the column information. For details see
http://java.sun.com/j2se/1.4.2/docs/api/java/sql/ResultSetMetaData.html
If you want to display the data of selected table and column value (statically filled combo box), then it is easy.
you can create your own SQL statement based on the selected tabe and column and set it to the rowset dynamically in the code (may be in the method beforerenderresponse).
- Winston

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Swing Applet in JSP: problem with fetching data from database

i am facing a problem while fetching data from database using Swing Applet plugged in a JSP page.
// necessary import statements
public class NewJApplet extends javax.swing.JApplet {
private JLabel jlblNewTitle;
private Vector vec;
public static void main(String[] args) {
JFrame frame = new JFrame();
NewJApplet inst = new NewJApplet();
frame.getContentPane().add(inst);
((JComponent)frame.getContentPane()).setPreferredSize(inst.getSize());
frame.pack();
frame.setVisible(true);
public NewJApplet() {
super();
initGUI();
private void initGUI() {
try {
this.setSize(542, 701);
this.getContentPane().setLayout(null);
jlblTitle = new JLabel();
this.getContentPane().add(jlblTitle);
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jlblTitle.setBounds(197, 16, 117, 30);
jlblTitle.setFont(new java.awt.Font("Dialog",1,20));
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this.getContentPane().add(jlblNewTitle);
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} catch (Exception e) {
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in index.jsp page i have included the following code for calling this applet:
<jsp:plugin type="applet" code="NewJApplet.class" codebase="applets"
width="600" height="300">
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if i view it in using AppletViewer it runs perfectly and display the data in JLabel. (ie, both jlblTitle and jlblNewTitle).(ie, DATA FETCHES FROM db AND DISPLAYS PROPERLY)
BUT IF I CLICK ON INDEX.JSP, ONLY jlblTitle APPEARS. jlblnNewTitle WILL BE BLANK(this label name is supposed to fetch from database)
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i signed the applet as follows :
grant {
permission java.security.AllPermission;
Can any body help me to figure out the problem?

This is the Swing Applet java code
import java.awt.Dimension;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.JScrollPane;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;
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 private JLabel jlblNewTitle;
 private Vector vec;
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 frame.pack();
 frame.setVisible(true);
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 super();
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 try {
 this.setSize(542, 701);
 this.getContentPane().setLayout(null);
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 this.getContentPane().add(jlblTitle);
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 this.getContentPane().add(jlblNewTitle);
 Vector vecTemp = getDBDatum();
 jlblNewTitle.setText(vecTemp.get(1).toString());
 jlblNewTitle.setBounds(350, 16, 117, 30);
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 Vector lvecData = new Vector(10,5);
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 Statement lstmt = null;
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 String lstrSQL = null;
 String lstrOut = null;
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I plugged the above Swing Applet in a JSP page index.jsp
<jsp:plugin type="applet" code="NewJApplet.class" codebase="applets"
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</jsp:plugin>Every thing is working fine in AppletViewer...But if i view this in any browser, then only the jlblTitle is displaying. jlblNewTitle is not displaying(this label name is actually fetching from thedatabase)
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Problem while retrving data from a view

Hi Friends
i have a problem while retriving data from a view v_t685a.
the error message is :""" "V_T685A" is not defined in the ABAP Dictionary as a table, projection view or database view."""
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waiting for quick response
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Hi
This is a Maintenance View, not a Database View
SO can't fetch data using select statement.
You can use the Table T685 directly to fetch the condition Types data straight away instead of the view. write the same select for this table and use.
Regards
Anji
Message was edited by:
 Anji Reddy Vangala

Problem while loading data from ODS to infoobject

Hi guys,
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Thanks in advance
savio

Hi,
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Want JTree e.g. of populating data from database.

I want ur JTree example of populating data from database, can u plz give me that eg.?
Awaiting 4 ur reply.

Hi,
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protected void resultSetToXML(OutputStream out,
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import javax.sql.DataSource;
import javax.xml.parsers.*;
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import javax.xml.transform.sax.*;
import javax.xml.transform.stream.*;
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import org.xml.sax.helpers.AttributesImpl;
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http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JAXPDOM6.html
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vidyut

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Neha

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Code:
public void serialEvent(SerialPortEvent event)
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LabVIEW Memory full while fetching data from database

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Fetching the entire database is probably not a good idea. You should narrow down how much you read at a time.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

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to overcom this problem,
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Hi,
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SELECT-OPTIONS: s_lifnr FOR lfa1-lifnr,                "Account Number of Vendor or Creditor
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start-of-selection.
Get data from CDHDR for Vendors
SELECT MANDANT        "Client
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Regards,
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etc
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sb.append(rs.getString("sapNo") + "\t");
sb.append(rs.getString("status")+ "\t");
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sb.append(rs.getString("days") + "\t");
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conn.close();
st.close();
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out.println("error");
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Thank you
Edited by: priyap on Apr 3, 2008 4:54 AM

hi,
there are some specific restrictions in downloading data in alv.
i.e you cannot have morethan 1024 characters that can be downloaded in single row.
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javax.usb.UsbException: Cannot claim an interface on a virtual root hub.
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 at com.ibm.jusb.os.DefaultUsbInterfaceOsImp.claim(DefaultUsbInterfaceOsImp.java:54)
 at com.ibm.jusb.UsbInterfaceImp.claim(UsbInterfaceImp.java:109)
 at com.ibm.jusb.UsbInterfaceImp.claim(UsbInterfaceImp.java:83)
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Cannot claim an interface on a virtual root hubSo don't do that? I have no idea how to tell, but clearly you need to test a few more attributes before you claim. Or else just log the claim error and continue with the next interface.

Very very urgent. population data from database into dropdownbox

Hi,
i imported a model through ejbs
this is to create new entries into database ,
and my scenerio iso now i need to populate the values that i stored into database thro EJBS in a drop down box of wd application.
plz help me through code ,i am new to java webdynpro...
neede very urgently,
Thanx .
Arjun.G
Message was edited by:
arjun swamy

Hi,
Have a look at these threads
Dropdown by index in table - fetching values from database
Dropdown by index
Kind Regards,
Saravanan K

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Hi All,
I am facing a problem with external tabels. I have created an external table
create table ext_org_table
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records delimited by newline
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nobadfile
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reject limit unlimited;
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I just tried ths
Connected to Oracle Database 10g Enterprise Edition Release 10.2.0.1.0
Connected as SYS
create directory mydir as 'c:\csv';
grant read,write on directory mydir to scott;From Scott
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( id varchar2(10)
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organization external
( type oracle_loader
default directory MYDIR
access parameters
records delimited by newline
nologfile
nobadfile
fields terminated by ','
missing field values are null
location ('Orgdata.csv')
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again,
You may want to check if
1) If the directory exists (select * from all_directories where directory_name='MYDIR');
2) If the user has the read/write permissions on that directory
3) If the file orgdata exists in that directory.
Regards,
Bhushan

Problem while uploading data from flat file

hi friends,
suppose if there are 100 records in flat file , if 20 records uploaded with out any problem and if error occurs while uploading remaing data . is necessary to upload entire data again or else only remaining data should be uploaded?
i had used call transaction for purchase order application?
please give me reply soon its urgent
thanks & regards
priya

Hi Hari,
you have to upload the remaining data.
as u have used CT method, do 1 thing trap the error data in runtime & prepare another flat file. next time correct the data in new flat file. & run the DBC program again with this new flat file.
Reward if useful
Regards
ANUPAM

Problem while populating data from database dynamically.

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