Dynamic datatable:adding rows

I am working with Dynamic datatable . whilke adding a row i am able to add only one row . later i am unable to a dd .
code:
<h:commandLink value="ADD" action="#{icdMBean.actionAddrow}" />
back bean:
public void actionAddrow() {
// Create new items.
icdList= new ArrayList<Icd>();
Icd myNewDataItem = new Icd();System.out.println("i am in action add row2");
myNewDataItem.setId("new");
icdList.add(myNewDataItem);
if i set the id value( myNewDataItem.setId("new");) only i am able to add only one row .
could you please suggest a solution for it.

Hi, many thanks for your answer, so what do you think is the best solution for adding rows by user to interactive form's dynamic table?
Manually read xml data during submit by this way: https://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/9121. [original link is broken] [original link is broken] [original link is broken] ?
Or is there better solution for this? (any link to some examples, blogs, etc...)
Many thanks for any answer!

Similar Messages

Interactive form in WD4A - dynamic table - adding rows

Hi,
I have a problem with dynamic table in WD4A. User can add row to table by clicking a button on form, but added rows are not transfered to mapped context node in my web dynpro application. I have made a lot of searches on SDN and I have found a lots of threads, but no answer.
Maybe this should be a way:
https://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/9121. [original link is broken] [original link is broken] [original link is broken] - Read adobe data manually and create context element manualy too.. But I think this should be a part of webdynpro/interactive forms framework.
Thanks for any answer!

Hi, many thanks for your answer, so what do you think is the best solution for adding rows by user to interactive form's dynamic table?
Manually read xml data during submit by this way: https://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/9121. [original link is broken] [original link is broken] [original link is broken] ?
Or is there better solution for this? (any link to some examples, blogs, etc...)
Many thanks for any answer!

Reading the Data from dynamically added rows of a table...

Hi,
              I am using adobe interactive form (WD ABAP) in which i am adding the table rows dynamically (using Jscript code). I have to fech these data into an internal table. But I can read only the first row data..
              Also While adding rows dynamically the same data is repeating for the consecutive rows..
              I have found many similar posts in sdn, but i cannot get the solution. They have mentioned about adding in WDDOINIT method. Can anyone explain me what should be done,..?
1) How to solve repeatative data while adding rows..?
2) How to read dynamically added row data during runtime into internal table..?
Thanks,
Surya.

Discussed @ SDN lot of time before. Have a look at any of below threads:-
Dynamic table in interactive form...
Make dynamic tables in Adobe Interactive forms
Adding Rows dynamically upon clicking the button
How to get values to WebDynpro ABAP from dynamic table?
Chintan

Adding rows in web dynpro ABAP Dynamic Interactive form.

Hi Experts,
I am having problem in web dynpro ABAP Dynamic Interactive form.
This is my scenario....
I have a dynamic interactive form that has buttons to add and remove rows in a table. It works fine when I preview it , but when I render, view or save it using ADS, it no longer works. The "add" button actually does instantiate more repeating rows, because I put some trace messages in to count them, but the added rows are not displayed. How do I make them visible?
In web dynpro java we write some coding in modify view to set the pdf form as dynamic
IWDInteractiveForm iForm =
(IWDInteractiveForm)view.getElement("<ID>");
iForm.setDynamicPDF(true);
simillarly what we need to write in web dynpro ABAP.
Please give me solution for the same.
Thanks,
Sathish

hi all,
expecting reply from u all. pls help me and give some sugesstion.
regards,
vinoth.

Adding Specific columns of dynamic internal table row into another column

Hi Gurus,
I need to add few columns of a dynamic internal table row into another column:
Article description hy01 hy02 total
101      panza         10     12      22
102      masht         12     12     24
dynamic internal table is created and columns hy01 hy02.... can increase
How to add the the values in hy01 hy 02... into total.
Regards,
Dep

Hi,
If you really want to have a dynamic table, then you will have to find a way to generate a whole new table, and then copy the data from the old table to the new one. There is no way to modify a type during runtime in ABAP.
Here an example how to generate a dynamic table based on another internal table, hope this will help you.
TYPE-POOLS: slis.
PARAMETERS: p_nb_hy TYPE i DEFAULT 2. "Number of new HY columns to be added
* Type ZST_T:
*   matnr TYPE matnr
*   maktx TYPE maktx
*   hy01   TYPE i
*   total TYPE i
TYPES: ty_t TYPE STANDARD TABLE OF zst_s.
PERFORM main.
*&      Form main
*       text
FORM main.
DATA: lt_fieldcat     TYPE slis_t_fieldcat_alv,
        lt_t            TYPE ty_t,
        lr_new_t        TYPE REF TO data.
FIELD-SYMBOLS: <lt_new_t> TYPE STANDARD TABLE.
"Add some lines to LT_T just to have something to display on screen
DO 10 TIMES.
    APPEND INITIAL LINE TO lt_t.
ENDDO.
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'ZST_S'
    CHANGING
      ct_fieldcat      = lt_fieldcat.
"Copy LT_T to LR_NEW_T
PERFORM extend_and_copy_table USING lt_t p_nb_hy CHANGING lr_new_t lt_fieldcat.
CLEAR lt_t. "Not needed anymore...
ASSIGN lr_new_t->* TO <lt_new_t>.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
    EXPORTING
      it_fieldcat = lt_fieldcat
    TABLES
      t_outtab    = <lt_new_t>.
ENDFORM.                    "main
*&      Form extend_and_copy_table
FORM extend_and_copy_table USING ut_t           TYPE STANDARD TABLE
                                 uv_nb_hy       TYPE i
                           CHANGING cr_t        TYPE REF TO data
                                    ct_fieldcat TYPE slis_t_fieldcat_alv
                           RAISING cx_sy_struct_creation cx_sy_table_creation.
DATA: lo_tabledescr      TYPE REF TO cl_abap_tabledescr,
        lo_structdescr     TYPE REF TO cl_abap_structdescr,
        lo_new_structdescr TYPE REF TO cl_abap_structdescr,
        lo_new_tabledescr TYPE REF TO cl_abap_tabledescr,
        lt_components      TYPE cl_abap_structdescr=>component_table,
        ls_component       TYPE cl_abap_structdescr=>component,
        lv_field_cnt       TYPE numc2,
        ls_fieldcat        TYPE slis_fieldcat_alv,
        lr_fieldcat        TYPE REF TO slis_fieldcat_alv.
FIELD-SYMBOLS: <ls_old_s> TYPE ANY,
                 <lt_new_t> TYPE STANDARD TABLE,
                 <ls_new_s> TYPE ANY.
"Get the list of all components from UT_T line structure
lo_tabledescr ?= cl_abap_tabledescr=>describe_by_data( ut_t ).
lo_structdescr ?= lo_tabledescr->get_table_line_type( ).
lt_components = lo_structdescr->get_components( ).
"The new columns will be from type of column HY01
ls_component-type = lo_structdescr->get_component_type( 'HY01' ).
"The new columns will have the same fieldcat info as column HY01
READ TABLE ct_fieldcat INTO ls_fieldcat WITH KEY fieldname = 'HY01'.
"HY<lv_field_cnt> = new field name
lv_field_cnt = uv_nb_hy + 1.
"For each new column...
DO uv_nb_hy TIMES.
    "Generate the new column field name
    CONCATENATE 'HY' lv_field_cnt INTO ls_component-name.
    ls_fieldcat-fieldname = ls_component-name.
    "Add the new field to the components of the new structure
    INSERT ls_component INTO lt_components INDEX 4.
    "Add the new field's fieldcat info to the fieldcat
    INSERT ls_fieldcat INTO ct_fieldcat   INDEX 4.
    lv_field_cnt = lv_field_cnt - 1.
ENDDO.
"Adjust the COL_POS from fieldcat
LOOP AT ct_fieldcat REFERENCE INTO lr_fieldcat.
    lr_fieldcat->col_pos = sy-tabix.
ENDLOOP.
"Create the new table
lo_new_structdescr = cl_abap_structdescr=>create( p_components = lt_components ).
lo_new_tabledescr = cl_abap_tabledescr=>create( p_line_type = lo_new_structdescr ).
CREATE DATA cr_t TYPE HANDLE lo_new_tabledescr.
ASSIGN cr_t->* TO <lt_new_t>.
"Copy all data from old to new table
LOOP AT ut_t ASSIGNING <ls_old_s>.
    APPEND INITIAL LINE TO <lt_new_t> ASSIGNING <ls_new_s>.
    MOVE-CORRESPONDING <ls_old_s> TO <ls_new_s>.
ENDLOOP.
ENDFORM.                    "main

Add null rows in WDDOINIT for fetching data from dynamically added rows..

Hi,,
I have to fetch data from a dynamically added rows of a table.
I have followed / gone through many forums but they ddnot mention how to add null rows in the initialization method..
I am using WD Abap..
Can anyone help how to bind null rows in WDDOINIT method..?
Thanks,
Surya

Discussed @ SDN lot of time before. Have a look at any of below threads:-
Dynamic table in interactive form...
Make dynamic tables in Adobe Interactive forms
Adding Rows dynamically upon clicking the button
How to get values to WebDynpro ABAP from dynamic table?
Chintan

DataTable - Read Rows Dynamically

Hi ,
Does anyone knows how to read rows from Datatable dynamically ?
What I'm looking for is: a private function which a collection column names and datatable with rows and that function will return me back the values of those functions with column names
Bhupinder Singh

Try something like this
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication1
class Program
static void Main(string[] args)
DataTable table = new DataTable();
table.Columns.Add("a", typeof(int));
table.Columns.Add("b", typeof(int));
table.Columns.Add("c", typeof(int));
table.Rows.Add(new object[] { 1, 2, 3 });
table.Rows.Add(new object[] { 4, 5, 6 });
table.Rows.Add(new object[] { 7, 8, 9 });
int numCols = table.Columns.Count;
List<string> colNames = new List<string>();
foreach (DataColumn col in table.Columns)
colNames.Add(col.ColumnName);
foreach (DataRow row in table.AsEnumerable())
foreach (string colName in colNames)
int cell = row.Field<int>(colName);
jdweng

How to create dynamic DataTable with dynamic header/column in JSF?

Hello everyone,
I am having problem of programmatically create multiple DataTables which have different number of column? In my JSF page, I should implement a navigation table and a data table. The navigation table displays the links of all tables in the database so that the data table will load the data when the user click any link in navigation table. I have gone through [BalusC's post|http://balusc.blogspot.com/2006/06/using-datatables.html#PopulateDynamicDatatable] and I found that the section "populate dynamic datatable" does show me some hints. In his code,
// Iterate over columns.
        for (int i = 0; i < dynamicList.get(0).size(); i++) {
            // Create <h:column>.
            HtmlColumn column = new HtmlColumn();
            dynamicDataTable.getChildren().add(column);
            // Create <h:outputText value="dynamicHeaders"> for <f:facet name="header"> of column.
HtmlOutputText header = new HtmlOutputText();
header.setValue(dynamicHeaders[i]);
column.setHeader(header);
// Create <h:outputText value="#{dynamicItem[" + i + "]}"> for the body of column.
HtmlOutputText output = new HtmlOutputText();
output.setValueExpression("value",
createValueExpression("#{dynamicItem[" + i + "]}", String.class));
column.getChildren().add(output);
public HtmlPanelGroup getDynamicDataTableGroup() {
// This will be called once in the first RESTORE VIEW phase.
if (dynamicDataTableGroup == null) {
loadDynamicList(); // Preload dynamic list.
populateDynamicDataTable(); // Populate editable datatable.
return dynamicDataTableGroup;
I suppose the Getter method is only called once when the JSF page is loaded for the first time. By calling this Getter, columns are dynamically added to the table. However in my particular case, the dynamic list is not known until the user choose to view a table. That means I can not call loadDynamicList() in the Getter method. Subsequently, I can not execute the for loop in method "populateDynamicDataTable()".
So, how can I implement a real dynamic datatable with dynamic columns, or in other words, a dynamic table that can load data from different data tables (different number of columns) in the database at run-time?
Many thanks for any help in advance.

flyeminent wrote:
However in my particular case, the dynamic list is not known until the user choose to view a table. Then move the call from the getter to the bean's action method.

Change field value in a table, based on another field value in the same row (for each added row)

Please Help, I want to change field value in a table, based on another field value in the same row (for each added row)
I am using this code :
<HTML>
<HEAD>
<SCRIPT>
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++ ) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[1].cells[i].innerHTML;
switch(newcell.childNodes[0].type) {
case "text":
newcell.childNodes[0].value = "";
break;
case "checkbox":
newcell.childNodes[0].checked = false;
break;
case "select-one":
newcell.childNodes[0].selectedIndex = 0;
break;}}}
function deleteRow(tableID) {
try {var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 2) {
alert("Cannot delete all the rows.");
break;}
table.deleteRow(i);
rowCount--;
i--;}}}catch(e) {alert(e);}}
</SCRIPT>
</HEAD>
<BODY>
<INPUT type="button" value="Add Row" onClick="addRow('dataTable')" />
<INPUT type="button" value="Delete Row" onClick="deleteRow('dataTable')" />
<TABLE id="dataTable" width="350px" border="1">
<TR>
<TD width="32"></TD>
<TD width="119" align="center"><strong>Activity</strong></TD>
<TD width="177" align="center"><strong>Cost</strong></TD>
</TR>
<TR>
<TD><INPUT type="checkbox" name="chk"/></TD>
<TD>
<select name="s1" id="s1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</TD>
<TD><input type="text" name="txt1" id="txt1"></TD>
</TR>
</TABLE>
</BODY>
</HTML>

Hi,
Let me make sure u r working with table control.
First u have to create a event(VALIDATE) to do the validation.
Inside the event,
1. First get the current index where user has pointed the curson
2. Once u get the index read the internal table with index value.
3. Now u can compare the col1 and col2 values and populate the error message.
1. DATA : lo_elt TYPE REF TO if_wd_context_element,
l_index type i.
lo_elt = wdevent->get_context_element( name = 'CONTEXT_ELEMENT' ).
CALL METHOD LO_ELT->GET_INDEX( RECEIVING MY_INDEX = l_index.
above code should be written inside the event.
Thanks,

Generating a REAL dynamic datatable

Hi,
I've been looking for a solution, reading a lot of books about server faces, understood the whole Beans concept, took some sun courses (incl 314) but still don't get one thing. I need to finish a project and i have to move on fast now.
I want to be able to :
Generate a dynamic datatable from any query, WITHOUT having to know and create each column component for each resulting column.
In addition i need to be able to have a commandbutton on each row, that would enable me to retrieve which row should be updated exactly.
I found tons of examples on that, some people on forums wrote about how to do dynamic datatables, but they created each column from start and binded them to a fix field. I read a lot and tried a lot and til now i was just dissappointed of some people's code spaming google search results on "dynamic datatable" that definetly is not a dynamic datatable.
I tried myfaces samples too from apache, decompiled their bean, but they backing it with a simple datamodel and an arraylist :-(
1. I need someone to explain me how to generate a dynamic datatable.
2. I need to back that datatable with a cachedRowSet or a ResultSet and to understand how to get UIData from a ResultSet.
Sincerely please help i really need help about that fast.

The goal i wanted to reach (and my definition of "dynamic") is not having to redesign everything as soon as something changes.
Because binding has to be done, objects have to be declared for each column, and because binding is not dynamic (no expression), you cannot have a REAL dynamic datatable. I got that now meanwhile.
Exactly as i thaught (still HTML cough), it's web-based and a problem of the programming language.
Like in Delphi Pascal, or any none web-based development language, one could have done such thing in 5 minutes.
The problem with Java JSP JSF is that you only find out its limits after you have put some time into it, but not when you get conviced to use it.
I remember speaches swearing "it can do everything that other languages can and more ..." Well, i don't think so.
I meanwhile found so many threads of programmers, having to migrate to Java JSP JSF and now being lost in the same situation.
Still open to any suggestions.

To find the "column value" when clicked on Dynamic datatable

I ahve done a dynamic table where the first row alone i ahve declared as command link.So when I click on the commadn link I need to get either column name or column count or rowdata.If I Get then I have some logic based on it to do.
I have placed my dynamic datatable code below.
public class Datatable2 extends PageCodeBase
UIData dataTable =new UIData();
public Datatable2()
UIColumn col;
UIOutput out = null;
ArrayList al=new ArrayList();
al.add("Item");
al.add("Creation date");
al.add("Priority");
Application app = FacesContext.getCurrentInstance().getApplication();
int colCount = 3;
for(int j = 0; j < colCount; ++j) {
out = new UIOutput();
col = new UIColumn();
if(dataTable.getRowIndex()==-1)
MethodBinding mb = app.createMethodBinding("#{pc_DataTable.item}", null);
HtmlCommandLink link = (HtmlCommandLink)app.createComponent(HtmlCommandLink.COMPONENT_TYPE);                     link.setActionListener(mb);
link.setAction(mb);
link.setId("Command"+j);
ValueBinding vb1 = app.createValueBinding("#{commands" + j + "}");
link.setValueBinding("value",vb1);
link.setRendererType("javax.faces.Link");
HtmlOutputText O = new HtmlOutputText();
O.setValue(al.get(j).toString());
link.getChildren().add(O);
col.setHeader(link);
ValueBinding vb = app.createValueBinding("#{rows["+j+"]}");
out.setValueBinding("value", vb);
out.setRendererType("javax.faces.Text");
col.getChildren().add(out);
dataTable.getChildren().add(col);
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     return dataTable;
public void setDataTable(UIData dataTable)
this.dataTable=dataTable;
public Object[] getTableRows()
Object[] test = new Object[]{new String[]{"1","2","3"},
new String[]{"4","5","6"},
new String[]{"7","8","9"},
new String[]{"10","11","12"},
new String[]{"13","14","15"}};
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this is my jsp code
<f:view>
<P>Place content here.</P>
<h:form>
<h:dataTable binding="#{pc_Datatable2.dataTable}" value="#{pc_Datatable2.tableRows}" var= "rows" />
</h:form>
</f:view>
Could please tell how can i figure out my coulmn value when clicked on the command link

hello,
u can use two types methods u can create a dynamic action or by branching using conditional or java script code
for java script code just call the code when button clicked and in javascript function by using if condition u can redirect.
Regards,
Ramana

Adding Rows and Columns to a table depending requirements

Hi all,
I have created a table with one row and 2 columns of a table. My client requested adding form one to 3 columns of the right table and rows as well, depending business requirements.
I can add coding add columns on the right, but I cannot add rows because the columns dynamic.
I tried to write the coding for adding rows but it is not successful. Please help.
event : click - add colum button
for (var i = 0; i < form1.page1.Table1._Row1.count; i++){
var newrow = form1.page1.Table1.resolveNode("Row1[" + i + "]");
var newrow2 = form1.page1.Table1.resolveNode("HeaderRow[" + i + "]");
newrow._Col3D.addInstance(0);
newrow2._Col3D.addInstance(0);
i also published my file for your reviewing.
https://workspaces.acrobat.com/?d=xcgcfby89J-IHenn-8xeaQ
Thank you very much,
Cindy

When you are adding instances it uses the default properties of the object...
If its hidden as a default value in the form and you add an instance, the new instance will be hidden..
So if you have 3 columns in your default row and trying to add an instance withthe 5 columns it will only add a row with 3 columns..
If you want to add the columns to the table, you must add the column to each new row instance.
E.g.:
var intCount = xfa.resolveNode("page1.table1.Row1").instanceManager.count;
form1.page1.table1._Row1.addInstance(1);
xfa.resolveNode("page1.table1.Row1[" + intCount.toString() + "].Col3D").addInstance(1);

Problem in adding rows in a table

Hello All ,
I am having a strange problem in adding table rows here . All things seems to be in place . But when i click the button nothing happens . I have worked on much more complex tables and added rows safely but i cant understand what's happening here . I have saved the form as Dynamic XML form , interactive form , I have set the pagination of the repeating rows . But Heck !!! It's not working at all . I am totally confused . More over while i drag the table from the object palette an error appears and LC closes down .But when i click on the table at the toolbar and inserted table over there then it shows no error . What's happening ?? Any help is greatly appreciated .
Script : form1.Page1.Subform1.Button1::click - (JavaScript, client)
form1.Page1.Subform1.Table1.Row4.instanceManager.addInstance(1);
Thanks .
Bibhu.

Hi,
The way you described reminded me of another thread, where the index was not straightforward: Saving finished Form duplicates some subForms
You can post your form to Acrobat.com, hit the Share and Publish buttons when prompted and then copy / paste the link here.
Niall

How to create a Dynamic Datatable with sorting functioanlity

Hi,
I am new to JSF and need some help can some one please tell me how to create a dynamic datatable with sorting functionality. I am reading data data from a database table and wants to build the datatable dynamically based on the columns returned. I know how to created a datatble with a fixed number of columns but can't figure out how to create a datatable dynamically with sort functionality. Any small example will help.
Thanks

Hi,
Here is what I have so far and can't figure out how to add the sorting functionality. Any help is appreciated.
Managed Bean:
private List<MyDto> data ;
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        if ( dataTableOne == null )
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            populateDynamicDataTableOne () ;
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        data = new ArrayList<MyDto> () ;
        MyDto myDto1 = new MyDto () ;
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        MyDto myDto3 = new MyDto () ;
        MyDto myDto4 = new MyDto () ;
        myDto1.setChecked ( true ) ;
        myDto1.setValue ( "myDto1" ) ;
        myDto2.setChecked ( false ) ;
        myDto2.setValue ( "myDto2" ) ;
        myDto3.setChecked ( false ) ;
        myDto3.setValue ( "myDto3" ) ;
        myDto4.setChecked ( true ) ;
        myDto4.setValue ( "myDto4" ) ;
        data.add ( myDto1 ) ;
        data.add ( myDto2 ) ;
        data.add ( myDto3 ) ;
        data.add ( myDto4 ) ;
    public void populateDynamicDataTableOne ()
        dataTableOne = new HtmlDataTable () ;
        UIOutput header = new UIOutput () ;
        header.setValue ( "" ) ;
        UIColumn tableColumn ;
        tableColumn = new UIColumn () ;
        HtmlOutputText textHeader = new HtmlOutputText () ;
        textHeader.setValue ( "" ) ;
        tableColumn.setHeader ( textHeader ) ;
        HtmlSelectBooleanCheckbox tCheckBox = new HtmlSelectBooleanCheckbox () ;
        tCheckBox.setValueBinding ( "value" , FacesContext.getCurrentInstance ().getApplication ().createValueBinding ( "#{row.checked}" ) ) ;
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        UIOutput output = new UIOutput () ;
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        output.setValueBinding ( "value" , myItem ) ;
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        UIOutput header2 = new UIOutput () ;
        header2.setValue ( "" ) ;
        UIColumn column = new UIColumn () ;
        column.setHeader ( header2 ) ;
        column.getChildren ().add ( output ) ;
        dataTableOne.getChildren ().add ( tableColumn ) ;
        dataTableOne.getChildren ().add ( column ) ;
MyDto.java
public class MyDto
    private Boolean checked;
    private String value;
    public MyDto ()
    public void setChecked ( Boolean checked )
        this.checked = checked;
    public Boolean getChecked ()
        return checked ;
    public void setValue ( String value )
        this.value = value;
    public String getValue ()
        return value ;
JSP
<h:dataTable id="table" value="#{myRequestBean.data}" binding="#{myRequestBean.dataTableOne}" var="row" />Thanks

Has anyone been able to create a HtmlDataTable with dynamic col and rows?

Has anyone been able to create a HtmlDataTable with dynamic col and rows?
If so please explain. I am successfully able to dynamically add columns using the getChildren method of the htmldatatable object
BUT for each new column created no data is displayed.
I am only able to display data for columns originally created when i clicked and dragged the dataTable icon from the pallette in netbeans visual web kit.
Any help on this is greatly appreciated. I have been searching the web and these forums for around 8 hours and no one seems to have a working example of this. Lots of similar posts asking how to do it though :(
Thanks in advance.

This might be useful: http://balusc.xs4all.nl/srv/dev-jep-dat.html

Dynamic datatable:adding rows

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