<?xml version="1.0" encoding="utf-8" ?> 
<mx:Application xmlns:mx="http://www.macromedia.com/2005/mxml" backgroundColor="#FFFFFF" width="500" height="600">
<mx:Panel title="Printing from a DataGrid">
<mx:VBox>
  <mx:Label text="number of rows to create:" /> 
<mx:HBox>
  <mx:Button label="Print" click="doPrint()" /> 
  <mx:Button label="Go" click="genData()" /> 
  <mx:TextInput id="rows" text="20" /> 
  </mx:HBox>
  </mx:VBox>
  
    <mx:PrintDataGrid id="myDataGrid" width="300" height="500" sizeToPage="false" /> 
  </mx:Panel>
<mx:Script>
<![CDATA[ 
import mx.print.FlexPrintJob;
import FormPrintView;
      public  function genData():void {
            var rowCount:Number = Number(rows.text);
            var dp:Array = [];
            for (var i:int=0;i<rowCount;i++) {
                dp.push({data1:"$" + i + ".00"});
            }
            myDataGrid.dataProvider = dp;
        }
		
		/*
//  This is the method for flex 1.5. It is still working in flex 2
	public function doPrint():void {
      var pj : PrintJob = new PrintJob();

      //Save the current vertical scroll position of the DataGrid control. 
      var prev_vPosition:Number = myDataGrid.vPosition;

      if(pj.start() != true)            {
         delete pj;
         return;
      }

      //Calculate the number of visible rows.       
      var rowsPerPage:Number = Math.floor((myDataGrid.height - myDataGrid.rowHeight)/myDataGrid.rowHeight);

      //Calculate the number of pages required to print all rows. 
      var pages:Number = Math.ceil(myDataGrid.dataProvider.length / rowsPerPage);

      //Scroll down each page of rows, then call addPage() once for each page. 
      for (var i:int=0;i<pages;i++) {
         myDataGrid.vPosition = i*rowsPerPage;
         pj.addPage(myDataGrid);         
       }

      pj.send();
      delete pj;

      // Restore vertical scroll position.
      myDataGrid.vPosition = prev_vPosition;
}
*/
 public function updateLayout():void
        {
            UIComponent.layoutManager.usePhasedInstantiation = false;
            UIComponent.layoutManager.validateNow();    
        }

// the routine to print the output
        public function doPrint():void {
            // Create a FlexPrintJob instance.
            var pj:FlexPrintJob = new FlexPrintJob();
            // Start the print job.
            if (pj.start()) {
                // Get the number of rows of data. This number does not include any headers.
                var numRows:int = myDataGrid.dataProvider.length;
               //var numRows:int = Math.floor((myDataGrid.height - myDataGrid.rowHeight)/myDataGrid.rowHeight);

               updateLayout(); 
                // If the print image's data grid can hold all the provider's rows, 
                // add the page to the print job. 
                // Subtract one from the row count to account for the header.
                if((myDataGrid.rowCount - 1) >= numRows)
                {
                    pj.addObject(myDataGrid);
                }
                // Otherwise, the job requires multiple pages.
                else
                {
                    // Create the first page and add it to the print job.
					myDataGrid.percentHeight = 100;
            		//Update the DataGrid layout to reflect the results of this function.
            		updateLayout();                   
                   pj.addObject(myDataGrid);

                    // Loop through the following code until all pages are queued.
                    while(true)
                    {
                        // Move the next page of data to the top of the print grid.
                      myDataGrid.nextPage();
    
                        // If the page holds the remaining data, or if the last page 
                        // was completely filled by the last grid data, queue it for
                        // printing.
                        if((myDataGrid.vPosition +
                            myDataGrid.rowCount -1) >= numRows)
                        {
                            if(myDataGrid.vPosition >= numRows)
                            // The previous page completed the grid, but the footer
                            // didn't fit. Hide the data grid and print only the footer. 
                            {
                              myDataGrid.height = 0;
                               myDataGrid.visible = false;
                           }
						   updateLayout(); 
                            pj.addObject(myDataGrid);
                            // The last page has been queued. Exit the print loop.
                            break;
                        }
                        else
                        // This is not the last page. Queue a middle page. 
                        {
                    
                            pj.addObject(myDataGrid);

                        }
                    }
                }
                // All pages are queued; remove the FormPrintView control to free memory.
               // removeChild(thePrintView);
            }
            // Send the job to the printer.
            pj.send();
        }



  ]]> 
  </mx:Script>
  </mx:Application>