Bug 203024 Not all the data binding to the chart are exported when preview as XLS [1203]
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelUtil.java
{
	public static String ridQuote( String val )
	{
		if ( val.charAt( 0 ) == '"' && val.charAt( val.length( ) - 1 ) == '"' )
		{
			return val.substring( 1, val.length( ) - 1 );
		}
		return val;
	}
    public static String formatDate( Object data )
	{
       
		SimpleDateFormat dateFormat = new SimpleDateFormat(
				"yyyy-MM-dd'T'HH:mm:ss" );
		return  dateFormat.format( (Date) data );
        
	}
    public static String formatNumber( Object data)
    {
       DecimalFormat numberFormat = new DecimalFormat("0.00E00");
       return numberFormat.format( (Number)data);
    }
      public static String getType(Object val)
    {
    	if ( val instanceof Number )
    	{
    	   return Data.NUMBER;