How to find out which checkboxes have been selected on the next page in VisualForce?

Question

I have a data table which iterates through a custom object and generates checkboxes. On the second page, I want to determine which of these checkboxes have been selected.

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Answer 1

Ok, if you want to handle it with Javascript, use Pavel's method, otherwise use the following to do it via the controller. You must create a wrapper class for whatever you wish to track. I'm not sure how it works, but somehow if you name a boolean variable "selected" in your wrapper class, it is mapped to the checkbox. Below is the code:

So in your Visual force page, do:

In your Controller, do the following: 1) Make a Wrapper class with the boolean "selected", which somehow maps to the inputCheckbox selected:

public class wFoo {
    public Foo__c foo {get; set}
    public boolean selected {get; set;}

    public wFoo(Foo__c foo) {
        this.foo = foo;
        selected = false; //If you want all checkboxes initially selected, set this to true
    }
}

2) declare the list variables

public List foos {get; set;}
public List selectedFoos {get; set;}

3) Define the accessor for the List

public List getFoos() {
    if (foos == null) {
        foos = new List();
        for (Foo__c foo : [select id, name from Foo__c]) {
            foos.add(new wFoo(foo));
        }
    }
    return foos;
}

4) Define the method to process the selected checkboxes and place them in a List for use on another page

public void processSelectedFoos() {
    selectedFoos = new List();
    for (wFoo foo : getFoos) {
        if (foo.selected = true) {
            selectedFoos.add(foo.foo); // This adds the wrapper wFoo's real Foo__c
        }
    }
}

5) Define the method to return the PageReference to the next page when the submit button is clicked

public PageReference getPage2() {
    processSelectedFoos();
    return Page.Page2;
}