How to get selected row index in JSF datatable?
- by Nitesh Panchal
I have a databale on index.xhtml
<h:dataTable style="border: solid 2px black;"
value="#{IndexBean.bookList}" var="item"
binding="#{IndexBean.datatableBooks}">
<h:column>
<h:commandButton value="Edit" actionListener="#{IndexBean.editBook}">
<f:param name="index" value="#{IndexBean.datatableBooks.rowIndex}"/>
</h:commandButton>
</h:column>
</h:dataTable>
My bean:
@ManagedBean(name="IndexBean")
@ViewScoped
public class IndexBean implements Serializable {
private HtmlDataTable datatableBooks;
public HtmlDataTable getDatatableBooks() {
return datatableBooks;
}
public void setDatatableBooks(HtmlDataTable datatableBooks) {
this.datatableBooks = datatableBooks;
}
public void editBook() throws IOException{
int index = Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("index").toString());
System.out.println(index);
}
}
My problem is that I always get the same index in server log even though I click the different edit buttons. Imagine that there is one collection which is supplied to the datatable. I have not shown that in bean.
If I change scope from ViewScope to RequestScope it works fine. What can be the problem with @ViewScoped? Thanks in advance :)
EDIT:
<h:column>
<h:commandButton value="Edit" actionListener="#{IndexBean.editBook}" />
</h:column>
public void editBook(ActionEvent ev) throws IOException{
if (ev.getSource() != null && ev.getSource() instanceof HtmlDataTable) {
HtmlDataTable objHtmlDataTable = (HtmlDataTable) ev.getSource();
System.out.println(objHtmlDataTable.getRowIndex());
}
}
