Store text in datgrid to variable

1

Is it possible to store the text in datagrid?? write code in checkboxcell.as or main frame
I tried in checkboxcell.as


/****************************************************************************
Copyright (C) 2005 Macromedia, Inc. All Rights Reserved.
The following is Sample Code and is subject to all restrictions on
such code as contained in the End User License Agreement accompanying
this product.
Class: CheckBoxCell
Description: Example of a class that can be assigned as a cell renderer to a list
type component -- in this case, a cell of a DataGrid.  This cellRenderer class
displays a CheckBox component.
****************************************************************************/
import mx.core.UIComponent
import mx.controls.CheckBox
class CheckBoxCell extends UIComponent
{
 private var check : MovieClip;
 private var listOwner : MovieClip;   // the reference we receive to the list
 private var getCellIndex : Function;   // the function we receive from the list
 private var getDataLabel : Function;   // the function we receive from the list
 
 private static var PREFERRED_HEIGHT = 16;  // The preferred height of the cell containing the ComboBox.
 private static var PREFERRED_WIDTH = 20;  // The preferred width of the cell containing the Combobox.
 // Constructor:  Should be empty.
 public function CheckBoxCell()
 {
 }
 /* UIObject expects you to fill in createChildren by instantiating
 all the movie clip assets you might need upon initialization. 
 In this case we are creating one label*/
 public function createChildren(Void) : Void
 {
  check = createObject("CheckBox", "check", 1, {styleName:this, owner:this});
  check.addEventListener("click", this);
  size();
 }
 /* Note: setSize is implemented by UIComponent and calls size(), after setting
 __width and __height.  You can use __width and __height to determine how to size
 the cell contents. */
 public function size(Void) : Void
 {
  check.setSize(PREFERRED_WIDTH, PREFERRED_WIDTH);
  check._x = (__width - PREFERRED_WIDTH)/2;
  check._y = (__height - PREFERRED_HEIGHT)/2;
 }
 // Called by the owner to set the value in the cell.  Inherited method.
 public function setValue(str:String, item:Object, sel:Boolean) : Void
 {
  /* Note:If item is undefined, nothing should be rendered in the cell, 
  so set the label as invisible. Note: For scrolling List type components
  like a scrolling datagrid, the cells are intended to be empty as they scroll
  just out of sight, and then the cell is reused again and set to a new value 
  producing an animated effect of scrolling.  For this reason, you cannot rely on
  any one cell always having data to show or the same value.*/
  check._visible = (item!=undefined);
  check.selected = item[getDataLabel()];
 }
 public function getPreferredHeight(Void) : Number
 {
  return PREFERRED_HEIGHT;
 }
 public function getPreferredWidth(Void) : Number
 {
  return PREFERRED_WIDTH;
 }
 public function click()
 {
  listOwner.dataProvider.editField(getCellIndex().itemIndex, getDataLabel(), check.selected);
  
  if (check.selected)
  {
   listOwner.dataProvider.editField(getCellIndex().itemIndex, "Time", _root.clock.time);
  } else {
   listOwner.dataProvider.editField(getCellIndex().itemIndex, "Time", "");
  }
 }
 
public function time()
 {
  time = new Array();
  _root.stime.text=""
  for (i=0; i<_root.student_mc.student_dg.length; i++) {
  time*=listOwner.dataProvider.editField(getCellIndex().itemIndex, "Time", _root.clock.time);
  _root.stime.text+=time*;
  }
 }
}
}

[color=darkred][/color]
it outputs error

**Error** D:\AppServ\www\ATM_login312\CheckBoxCell.as: Line 87: Type mismatch in assignment statement: found Array where Function is required.
       time = new Array();
Total ActionScript Errors: 1   Reported Errors: 1

So how do i point to the index in column of a datagrid???/