I was looking on the basicPortal site for the example, but couldn't find it. Could you give a direct link?
-----Original Message----- From: news [mailto:[EMAIL PROTECTED]] On Behalf Of V. Cekvenich Sent: Thursday, December 12, 2002 6:23 AM To: [EMAIL PROTECTED] Subject: Re: Processing multiple records all at once This is good. However.... a bit much copying. Also, quite a few forms could have multi row processing or master/detail processing. One does not want to to it over and over; if you do OO, you could create a basebean that does this in the ancestor, by having your formbean implement a collection, as in basicPortal.com open source example. .V Max Cooper wrote: > Brad, > > I have written some pages/actions that do what you describe here. I believe > that one way to go would be to use nested properties, but I haven't tried > that yet, so I am not sure how to do it. The solution I used was to create > an ActionForm for the page that has arrays for each field from the rows. > Something like this (generic example -- replace rowId and rowProperty1 with > your real row properties): > > public class RowsForm extends ActionForm { > private String[] rowId; > private String[] rowProperty1; > public String[] getRowId() { > return rowId; > } > public void setRowId(String[] rowId) { > this.rowId = rowId; > } > public String[] getRowProperty1() { > return rowProperty1; > } > public void setRowProperty1(String[] rowProperty1) { > this.rowProperty1 = rowProperty1; > } > } > > The properties are arrays to receive values from each row in the data set > when you submit the form. For iterating through the data, we added a method > that would return a Collection of objects, where each represents a single > row. Something like this: > > public class RowForm extends ActionForm { // this could also be a plain-old > JavaBean, too > private String id; > private String property1; > // getters and setters for the id and property1 > } > > // add this method to RowsForm > public Collection getRows() { > Collection rows = new ArrayList(); > final int size = rowId.length; > for (int i = 0; i < size; i++) { > RowForm row = new RowForm(); > row.setId(rowId[i]); > row.setProperty1(rowProperty1[i]); > rows.add(row); > } > return rows; > } > > So, that setup will allow you to get the data out of the form after the user > submits their changes (by calling RowsForm.getRows()). You will get data for > each row, so you still need to decide which rows were changed, and which > ones the user simply left alone. > > As for getting the data into the form and displaying it on the page, you > could add another method like populateForm(Vector rowData) to copy the data > to the arrays like this: > > // another method in RowsForm > public void populateForm(Vector rowData) { > // get the Vector size > final int size = rowData.size(); > // initialize the arrays > rowId = new String[size]; > rowProperty1 = new String[size]; > // copy the data from the objects in the Vector into the arrays > Vector rowData = new Vector(); > final int size = rowData.size(); > Enumeration enum = rowData.elements(); > for (int i = 0; i < size; i++) { > Data element = (Data) enum.nextElement(); > rowId[i] = String.valueOf(element.getId()); > rowProperty1[i] = element.getProperty1(); > } > } > > However, it might be a bit wasteful to copy all the data into the arrays if > you are going to call getRows() to turn them back into a Collection of > objects so that you can use the <logic:iterate> tag to display them in the > JSP. If you can get the data into a Collection instead of a Vector (or is a > Vector a Collection these days?), you can just have a single Collection > property on RowsForm that you set in the action, and the JSP will call the > getter to get the Collection to iterate over. The JSP to iterate over the > Collection and write out the rows might look something like this: > > <table> > <tr> > <th>id</th> > <th>property1</th> > </tr> > <logic:iterate name="rowsForm" property="rows" id="row" > type="com.yada.yada.yada.RowForm" scope="request"> > <tr> > <td> > <%-- write the id as text for display, and also as a hidden field for > submittal --%> > <bean:write name="row" property="id" /> > <html:hidden name="row" property="id" /> > </td> > <td> > <html:text name="row" property="property1" /> > </td> > </tr> > </logic:iterate> > </table> > > Your Action will get the populated RowsForm on the submit, and you can call > RowsForm.getRows() to get a Collection of RowForm objects to work with. > > -Max > > ----- Original Message ----- > From: "Brad Balmer" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, December 11, 2002 5:44 PM > Subject: Processing multiple records all at once > > > >>I've searched the internet and different news groups for an answer to this >>question, but have yet to find something that matches what I'm trying to > > do. > >>I have an application that reads records from a table and creates an >>instance of a bean for each row. Therefore, when I return from my DB > > call, > >>I have a Vector of beans representing the data. >> >>I need to display all of this on one jsp form, letting the user have the >>ability to update any of the fields in any of the records and click a > > Update > >>button, which will send ALL of the data back to the Action class to be >>processed. I have done this before (not using Struts), but we have > > switched > >>our Architecture and need to re-implement. >> >>Any help would be GREATLY appreciated. >> >> >> >> >> >>_________________________________________________________________ >>MSN 8 with e-mail virus protection service: 2 months FREE* >>http://join.msn.com/?page=features/virus >> >> >>-- >>To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > >>For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > >> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
