Presenting variable number of columns with primefaces datatable

[Vladislav Simovic]

I have the following problem my application returns a list of columns form database, and each column has array of its elements. I want to present it on JSF page. Problem is number of columns is not fixed.

So far I have managed to print output via something like this:

<ui:repeat var="list" value="#{Columns.listOfColumns}"> <ui:repeat var="array" value="#{list.arrayOfElements}"> <h:outputText value="#{array}"/> </ui:repeat> </ui:repeat>

But I would like to present it in the form of datatable, i have been using primefaces datatable, but i havent had much success. How can this be done?

[karan khosla]

<p:dataTable id="dTable" var="Any_Name_Treated as a Unique Identifier" value="#{beanName.YOUR_LIST_VAR}">
    <p:column>
        <f:facet name="header">Heading [ANY]</f:facet>
        <h:outputLabel value="#{Any_Name_Treated as a Unique Identifier.variableName}"/>
    </p:column>
</p:dataTable>

Hope! This Helps.

Cheers!
Karan

[Vladislav Simovic]

karan khosla wrote:

<p:dataTable id="dTable" var="Any_Name_Treated as a Unique Identifier" value="#{beanName.YOUR_LIST_VAR}">
    <p:column>
        <f:facet name="header">Heading [ANY]</f:facet>
        <h:outputLabel value="#{Any_Name_Treated as a Unique Identifier.variableName}"/>
    </p:column>
</p:dataTable>

Hope! This Helps.

Cheers!
Karan

Thats just regular datatable, which has one column. I need to be able to make datatable that has varible number of columns that is known in runtime.

[Vladislav Simovic]

I finally resolved this problem, this is how it is done:

<p:dataTable value="#{ProfUnosiRjesenja.tabela.nizRedova}" var="nizRedova"> <p:columns value="#{ProfUnosiRjesenja.tabela.nizKolona}" var="nizKolona" columnIndexVar="index"> <f:facet name="header"> <h:outputText value="#{nizKolona}"/> </f:facet> <h:outputText value="#{nizRedova[index]}"/> </p:columns> </p:dataTable>

public class Tabela {

    private int brojRedova;
    private int brojKolona;
    private ArrayList<Object[]> nizRedova;
    private ArrayList<String> nizKolona;

    public Tabela() {
    }

    public Tabela(int brojRedova, int brojKolona, ArrayList<Object[]> nizRedova, ArrayList<String> nizKolona) {
        this.brojRedova = brojRedova;
        this.brojKolona = brojKolona;
        this.nizRedova = nizRedova;
        this.nizKolona = nizKolona;
    }

    public int getBrojKolona() {
        return brojKolona;
    }

    public void setBrojKolona(int brojKolona) {
        this.brojKolona = brojKolona;
    }

    public int getBrojRedova() {
        return brojRedova;
    }

    public void setBrojRedova(int brojRedova) {
        this.brojRedova = brojRedova;
    }

    public ArrayList<String> getNizKolona() {
        return nizKolona;
    }

    public void setNizKolona(ArrayList<String> nizKolona) {
        this.nizKolona = nizKolona;
    }

    public ArrayList<Object[]> getNizRedova() {
        return nizRedova;
    }

    public void setNizRedova(ArrayList<Object[]> nizRedova) {
        this.nizRedova = nizRedova;
    }
}

More info can be found here: http://www.primefaces.org/showcase/ui/datatableDynamicColumns.jsf;jsessionid=57691A43B05DFACB3DDCB9E7287EF254

[Brendan Healey]

Whilst p:columns is the most flexible approach if you have the occasional column that
you want to enable/disable you can use p:column rendered=.

[Mark Bessem]

Is columns part of richfaces? because richfaces doesn't recognise the tag for me.

[Brendan Healey]

p: is PrimeFaces http://www.primefaces.org