6 files changed, 852 insertions, 830 deletions
diff --git a/framework/Web/THttpRequest.php b/framework/Web/THttpRequest.php
index 4e04ecca..b908db53 100644
--- a/framework/Web/THttpRequest.php
+++ b/framework/Web/THttpRequest.php
@@ -259,7 +259,7 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 */
 	public function getIsSecureConnection()
 	{
-		return !empty($_SERVER['HTTPS']);
+		return isset($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'],'off');
 	}
 
 	/**
@@ -287,6 +287,14 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	}
 
 	/**
+	 * @return string schema and hostname of the requested URL
+	 */
+	public function getBaseUrl()
+	{
+		return ($this->getIsSecureConnection() ? "https://" : "http://") . $_SERVER ['HTTP_HOST'];
+	}
+	
+	/**
 	 * @return string entry script URL (w/o host part)
 	 */
 	public function getApplicationUrl()
@@ -295,6 +303,14 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	}
 
 	/**
+	 * @return string entry script URL (w/ host part)
+	 */
+	public function getAbsoluteApplicationUrl()
+	{
+		return $this->getBaseUrl() . $this->getApplicationUrl();
+	}
+	
+	/**
 	 * @return string application entry script file path (processed w/ realpath())
 	 */
 	public function getApplicationFilePath()
diff --git a/framework/Web/THttpResponse.php b/framework/Web/THttpResponse.php
index 0c9406c4..e44d6cba 100644
--- a/framework/Web/THttpResponse.php
+++ b/framework/Web/THttpResponse.php
@@ -307,12 +307,15 @@ class THttpResponse extends TModule implements ITextWriter
 	/**
 	 * Redirects the browser to the specified URL.
 	 * The current application will be terminated after this method is invoked.
-	 * @param string URL to be redirected to
+	 * @param string URL to be redirected to. If the URL is a relative one, the base URL of
+	 * the current request will be inserted at the beginning.
 	 */
 	public function redirect($url)
 	{
 		if(!$this->getApplication()->getRequestCompleted())
 			$this->getApplication()->onEndRequest();
+		if($url[0]==='/')
+			$url=$this->getRequest()->getBaseUrl().$url;
 		header('Location:'.$url);
 		exit();
 	}
diff --git a/framework/Web/THttpSession.php b/framework/Web/THttpSession.php
index 379bc7b6..f95cb72d 100644
--- a/framework/Web/THttpSession.php
+++ b/framework/Web/THttpSession.php
@@ -609,7 +609,7 @@ class THttpSession extends TApplicationComponent implements IteratorAggregate,Ar
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @version $Revision: $  $Date: $
- * @package System.Web.UI
+ * @package System.Web
  * @since 3.0
  */
 class TSessionIterator implements Iterator
diff --git a/framework/Web/UI/TTemplateManager.php b/framework/Web/UI/TTemplateManager.php
index 53239bd9..caa1dcbc 100644
--- a/framework/Web/UI/TTemplateManager.php
+++ b/framework/Web/UI/TTemplateManager.php
@@ -850,7 +850,7 @@ class TTemplate extends TApplicationComponent implements ITemplate
 			}
 			$length=strlen($value);
 			if($length>$textStart)
-				$expr.=".'".substr($value,$textStart,$length-$textStart)."'";
+				$expr.=".'".strtr(substr($value,$textStart,$length-$textStart),array("'"=>"\\'","\\"=>"\\\\"))."'";
 			if($isDataBind)
 				return array(self::CONFIG_DATABIND,ltrim($expr,'.'));
 			else
diff --git a/framework/Web/UI/WebControls/TBulletedList.php b/framework/Web/UI/WebControls/TBulletedList.php
index fd9c1ca2..5499a9eb 100644
--- a/framework/Web/UI/WebControls/TBulletedList.php
+++ b/framework/Web/UI/WebControls/TBulletedList.php
@@ -167,7 +167,7 @@ class TBulletedList extends TListControl implements IPostBackEventHandler
 	}
 
 	/**
-	 * @return string style of bullets. Valid values include
+	 * @param string style of bullets. Valid values include
 	 * 'NotSet','Numbered','LowerAlpha','UpperAlpha','LowerRoman','UpperRoman','Disc','Circle','Square','CustomImage'
 	 */
 	public function setBulletStyle($value)
@@ -176,7 +176,7 @@ class TBulletedList extends TListControl implements IPostBackEventHandler
 	}
 
 	/**
-	 * @param string display mode of the list. Defaults to 'Text'.
+	 * @return string display mode of the list. Defaults to 'Text'.
 	 */
 	public function getDisplayMode()
 	{
diff --git a/framework/Web/UI/WebControls/TListControl.php b/framework/Web/UI/WebControls/TListControl.php
index 85b8d88f..a9087af5 100644
--- a/framework/Web/UI/WebControls/TListControl.php
+++ b/framework/Web/UI/WebControls/TListControl.php
@@ -1,824 +1,827 @@
-<?php
-/**
- * TListControl class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Revision: $  $Date: $
- * @package System.Web.UI.WebControls
- */
-
-/**
- * Includes the supporting classes
- */
-Prado::using('System.Web.UI.WebControls.TDataBoundControl');
-Prado::using('System.Web.UI.WebControls.TListItem');
-Prado::using('System.Collections.TAttributeCollection');
-Prado::using('System.Util.TDataFieldAccessor');
-
-
-/**
- * TListControl class
- *
- * TListControl is a base class for list controls, such as {@link TListBox},
- * {@link TDropDownList}, {@link TCheckBoxList}, etc.
- * It manages the items and their status in a list control.
- * It also implements how the items can be populated from template and
- * data source.
- *
- * The property {@link getItems} returns a list of the items in the control.
- * To specify or determine which item is selected, use the
- * {@link getSelectedIndex SelectedIndex} property that indicates the zero-based
- * index of the selected item in the item list. You may also use
- * {@link getSelectedItem SelectedItem} and {@link getSelectedValue SelectedValue}
- * to get the selected item and its value. For multiple selection lists
- * (such as {@link TCheckBoxList} and {@link TListBox}), property
- * {@link getSelectedIndices SelectedIndices} is useful.
- *
- * TListControl implements {@link setAutoPostBack AutoPostBack} which allows
- * a list control to postback the page if the selections of the list items are changed.
- * The {@link setCausesValidation CausesValidation} and {@link setValidationGroup ValidationGroup}
- * properties may be used to specify that validation be performed when auto postback occurs.
- *
- * There are three ways to populate the items in a list control: from template,
- * using {@link setDataSource DataSource} and using {@link setDataSourceID DataSourceID}.
- * The latter two are covered in {@link TDataBoundControl}. To specify items via
- * template, using the following template syntax:
- * <code>
- * <com:TListControl>
- *   <com:TListItem Value="xxx" Text="yyy" >
- *   <com:TListItem Value="xxx" Text="yyy" Selected="true" >
- *   <com:TListItem Value="xxx" Text="yyy" >
- * </com:TListControl>
- * </code>
- *
- * When {@link setDataSource DataSource} or {@link setDataSourceID DataSourceID}
- * is used to populate list items, the {@link setDataTextField DataTextField} and
- * {@link setDataValueField DataValueField} properties are used to specify which
- * columns of the data will be used to populate the text and value of the items.
- * For example, if a data source is as follows,
- * <code>
- * $dataSource=array(
- *    array('name'=>'John', 'age'=>31),
- *    array('name'=>'Cary', 'age'=>28),
- *    array('name'=>'Rose', 'age'=>35),
- * );
- * </code>
- * setting {@link setDataTextField DataTextField} and {@link setDataValueField DataValueField}
- * to 'name' and 'age' will make the first item's text be 'John', value be 31,
- * the second item's text be 'Cary', value be 28, and so on.
- * The {@link setDataTextFormatString DataTextFormatString} property may be further
- * used to format how the item should be displayed. See {@link formatDataValue()}
- * for an explanation of the format string.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $  $Date: $
- * @package System.Web.UI.WebControls
- * @since 3.0
- */
-abstract class TListControl extends TDataBoundControl
-{
-	/**
-	 * @var TListItemCollection item list
-	 */
-	private $_items=null;
-	/**
-	 * @var boolean whether items are restored from viewstate
-	 */
-	private $_stateLoaded=false;
-	/**
-	 * @var mixed the following selection variables are used
-	 * to keep selections when Items are not available
-	 */
-	private $_cachedSelectedIndex=-1;
-	private $_cachedSelectedValue=null;
-
-	/**
-	 * @return string tag name of the list control
-	 */
-	protected function getTagName()
-	{
-		return 'select';
-	}
-
-	/**
-	 * Adds attributes to renderer.
-	 * @param THtmlWriter the renderer
-	 */
-	protected function addAttributesToRender($writer)
-	{
-		$page=$this->getPage();
-		$page->ensureRenderInForm($this);
-		if($this->getIsMultiSelect())
-			$writer->addAttribute('multiple','multiple');
-		if($this->getEnabled(true))
-		{
-			if($this->getAutoPostBack() && $page->getClientSupportsJavaScript())
-				$this->renderClientControlScript($writer);
-		}
-		else if($this->getEnabled())
-			$writer->addAttribute('disabled','disabled');
-		parent::addAttributesToRender($writer);
-	}
-
-	/**
-	 * Renders the javascript for list control.
-	 */
-	protected function renderClientControlScript($writer)
-	{
-		$writer->addAttribute('id',$this->getClientID());
-		$this->getPage()->getClientScript()->registerPostBackControl($this->getClientClassName(),$this->getPostBackOptions());
-	}
-
-	/**
-	 * Gets the name of the javascript class responsible for performing postback for this control.
-	 * This method overrides the parent implementation.
-	 * @return string the javascript class name
-	 */
-	abstract protected function getClientClassName();
-
-	/**
-	 * @return array postback options for JS postback code
-	 */
-	protected function getPostBackOptions()
-	{
-		$options['ID'] = $this->getClientID();
-		$options['CausesValidation'] = $this->getCausesValidation();
-		$options['ValidationGroup'] = $this->getValidationGroup();
-		$options['EventTarget'] = $this->getUniqueID();
-		return $options;
-	}
-
-	/**
-	 * Adds object parsed from template to the control.
-	 * This method adds only {@link TListItem} objects into the {@link getItems Items} collection.
-	 * All other objects are ignored.
-	 * @param mixed object parsed from template
-	 */
-	public function addParsedObject($object)
-	{
-		// Do not add items from template if items are loaded from viewstate
-		if(!$this->_stateLoaded && ($object instanceof TListItem))
-		{
-			$index=$this->getItems()->add($object);
-			if(($this->_cachedSelectedValue!==null && $this->_cachedSelectedValue===$object->getValue()) || ($this->_cachedSelectedIndex===$index))
-			{
-				$object->setSelected(true);
-				$this->_cachedSelectedValue=null;
-				$this->_cachedSelectedIndex=-1;
-			}
-		}
-	}
-
-	/**
-	 * Performs databinding to populate list items from data source.
-	 * This method is invoked by dataBind().
-	 * You may override this function to provide your own way of data population.
-	 * @param Traversable the data
-	 */
-	protected function performDataBinding($data)
-	{
-		$items=$this->getItems();
-		if(!$this->getAppendDataBoundItems())
-			$items->clear();
-		$textField=$this->getDataTextField();
-		if($textField==='')
-			$textField=0;
-		$valueField=$this->getDataValueField();
-		if($valueField==='')
-			$valueField=1;
-		$textFormat=$this->getDataTextFormatString();
-		foreach($data as $key=>$object)
-		{
-			$item=$items->createListItem();
-			if(is_array($object) || is_object($object))
-			{
-				$text=TDataFieldAccessor::getDataFieldValue($object,$textField);
-				$value=TDataFieldAccessor::getDataFieldValue($object,$valueField);
-				$item->setValue($value);
-			}
-			else
-			{
-				$text=$object;
-				$item->setValue("$key");
-			}
-			$item->setText($this->formatDataValue($textFormat,$text));
-		}
-		// SelectedValue or SelectedIndex may be set before databinding
-		// so we make them be effective now
-		if($this->_cachedSelectedValue!==null)
-		{
-			$index=$items->findIndexByValue($this->_cachedSelectedValue);
-			if($index===-1 || ($this->_cachedSelectedIndex!==-1 && $this->_cachedSelectedIndex!==$index))
-				throw new TInvalidDataValueException('listcontrol_selection_invalid',get_class($this));
-			$this->setSelectedIndex($index);
-			$this->_cachedSelectedValue=null;
-			$this->_cachedSelectedIndex=-1;
-		}
-		else if($this->_cachedSelectedIndex!==-1)
-		{
-			$this->setSelectedIndex($this->_cachedSelectedIndex);
-			$this->_cachedSelectedIndex=-1;
-		}
-	}
-
-	/**
-	 * Creates a collection object to hold list items.
-	 * This method may be overriden to create a customized collection.
-	 * @return TListItemCollection the collection object
-	 */
-	protected function createListItemCollection()
-	{
-		return new TListItemCollection;
-	}
-
-	/**
-	 * Saves items into viewstate.
-	 * This method is invoked right before control state is to be saved.
-	 */
-	public function saveState()
-	{
-		parent::saveState();
-		if($this->_items)
-			$this->setViewState('Items',$this->_items->saveState(),null);
-		else
-			$this->clearViewState('Items');
-	}
-
-	/**
-	 * Loads items from viewstate.
-	 * This method is invoked right after control state is loaded.
-	 */
-	public function loadState()
-	{
-		parent::loadState();
-		$this->_stateLoaded=true;
-		if(!$this->getIsDataBound())
-		{
-			$this->_items=$this->createListItemCollection();
-			$this->_items->loadState($this->getViewState('Items',null));
-		}
-		$this->clearViewState('Items');
-	}
-
-	/**
-	 * @return boolean whether this is a multiselect control. Defaults to false.
-	 */
-	protected function getIsMultiSelect()
-	{
-		return false;
-	}
-
-	/**
-	 * @return boolean whether performing databind should append items or clear the existing ones. Defaults to false.
-	 */
-	public function getAppendDataBoundItems()
-	{
-		return $this->getViewState('AppendDataBoundItems',false);
-	}
-
-	/**
-	 * @param boolean whether performing databind should append items or clear the existing ones.
-	 */
-	public function setAppendDataBoundItems($value)
-	{
-		$this->setViewState('AppendDataBoundItems',TPropertyValue::ensureBoolean($value),false);
-	}
-
-	/**
-	 * @return boolean a value indicating whether an automatic postback to the server
-     * will occur whenever the user makes change to the list control and then tabs out of it.
-     * Defaults to false.
-	 */
-	public function getAutoPostBack()
-	{
-		return $this->getViewState('AutoPostBack',false);
-	}
-
-	/**
-	 * Sets the value indicating if postback automatically.
-	 * An automatic postback to the server will occur whenever the user
-	 * makes change to the list control and then tabs out of it.
-	 * @param boolean the value indicating if postback automatically
-	 */
-	public function setAutoPostBack($value)
-	{
-		$this->setViewState('AutoPostBack',TPropertyValue::ensureBoolean($value),false);
-	}
-
-	/**
-	 * @return boolean whether postback event trigger by this list control will cause input validation, default is true.
-	 */
-	public function getCausesValidation()
-	{
-		return $this->getViewState('CausesValidation',true);
-	}
-
-	/**
-	 * @param boolean whether postback event trigger by this list control will cause input validation.
-	 */
-	public function setCausesValidation($value)
-	{
-		$this->setViewState('CausesValidation',TPropertyValue::ensureBoolean($value),true);
-	}
-
-	/**
-	 * @return string the field of the data source that provides the text content of the list items.
-	 */
-	public function getDataTextField()
-	{
-		return $this->getViewState('DataTextField','');
-	}
-
-	/**
-	 * @param string the field of the data source that provides the text content of the list items.
-	 */
-	public function setDataTextField($value)
-	{
-		$this->setViewState('DataTextField',$value,'');
-	}
-
-	/**
-	 * @return string the formatting string used to control how data bound to the list control is displayed.
-	 */
-	public function getDataTextFormatString()
-	{
-		return $this->getViewState('DataTextFormatString','');
-	}
-
-	/**
-	 * Sets data text format string.
-	 * The format string is used in {@link TDataValueFormatter::format()} to format the Text property value
-	 * of each item in the list control.
-	 * @param string the formatting string used to control how data bound to the list control is displayed.
-	 * @see TDataValueFormatter::format()
-	 */
-	public function setDataTextFormatString($value)
-	{
-		$this->setViewState('DataTextFormatString',$value,'');
-	}
-
-	/**
-	 * @return string the field of the data source that provides the value of each list item.
-	 */
-	public function getDataValueField()
-	{
-		return $this->getViewState('DataValueField','');
-	}
-
-	/**
-	 * @param string the field of the data source that provides the value of each list item.
-	 */
-	public function setDataValueField($value)
-	{
-		$this->setViewState('DataValueField',$value,'');
-	}
-
-	/**
-	 * @return integer the number of items in the list control
-	 */
-	public function getItemCount()
-	{
-		return $this->_items?$this->_items->getCount():0;
-	}
-
-	/**
-	 * @return boolean whether the list control contains any items.
-	 */
-	public function getHasItems()
-	{
-		return ($this->_items && $this->_items->getCount()>0);
-	}
-
-	/**
-	 * @return TListItemCollection the item collection
-	 */
-	public function getItems()
-	{
-		if(!$this->_items)
-			$this->_items=$this->createListItemCollection();
-		return $this->_items;
-	}
-
-	/**
-	 * @return integer the index (zero-based) of the item being selected, -1 if no item is selected.
-	 */
-	public function getSelectedIndex()
-	{
-		if($this->_items)
-		{
-			$n=$this->_items->getCount();
-			for($i=0;$i<$n;++$i)
-				if($this->_items->itemAt($i)->getSelected())
-					return $i;
-		}
-		return -1;
-	}
-
-	/**
-	 * @param integer the index (zero-based) of the item to be selected
-	 */
-	public function setSelectedIndex($index)
-	{
-		if(($index=TPropertyValue::ensureInteger($index))<0)
-			$index=-1;
-		if($this->_items)
-		{
-			$this->clearSelection();
-			if($index>=0 && $index<$this->_items->getCount())
-				$this->_items->itemAt($index)->setSelected(true);
-			else if($index!==-1)
-				throw new TInvalidDataValueException('listcontrol_selectedindex_invalid',get_class($this),$index);
-		}
-		$this->_cachedSelectedIndex=$index;
-	}
-
-	/**
-	 * @return array list of index of items that are selected
-	 */
-	public function getSelectedIndices()
-	{
-		$selections=array();
-		if($this->_items)
-		{
-			$n=$this->_items->getCount();
-			for($i=0;$i<$n;++$i)
-				if($this->_items->itemAt($i)->getSelected())
-					$selections[]=$i;
-		}
-		return $selections;
-	}
-
-	/**
-	 * @param array list of index of items to be selected
-	 */
-	public function setSelectedIndices($indices)
-	{
-		if($this->_items)
-		{
-			$this->clearSelection();
-			$n=$this->_items->getCount();
-			foreach($indices as $index)
-			{
-				if($index>=0 && $index<$n)
-					$this->_items->itemAt($index)->setSelected(true);
-			}
-		}
-	}
-
-	/**
-	 * @return TListItem|null the selected item with the lowest cardinal index, null if no item is selected.
-	 */
-	public function getSelectedItem()
-	{
-		if(($index=$this->getSelectedIndex())>=0)
-			return $this->_items->itemAt($index);
-		else
-			return null;
-	}
-
-	/**
-	 * @return string the value of the selected item with the lowest cardinal index, empty if no selection
-	 */
-	public function getSelectedValue()
-	{
-		$index=$this->getSelectedIndex();
-		return $index>=0?$this->getItems()->itemAt($index)->getValue():'';
-	}
-
-	/**
-	 * Sets selection by item value.
-	 * Existing selections will be cleared if the item value is found in the item collection.
-	 * Note, if the value is null, existing selections will also be cleared.
-	 * @param string the value of the item to be selected.
-	 */
-	public function setSelectedValue($value)
-    {
-	    if($this->_items)
-	    {
-		    if($value===null)
-		    	$this->clearSelection();
-		    else if(($item=$this->_items->findItemByValue($value))!==null)
-	    	{
-		    	$this->clearSelection();
-		    	$item->setSelected(true);
-	    	}
-	    	else
-	    		throw new TInvalidDataValueException('listcontrol_selectedvalue_invalid',get_class($this),$value);
-    	}
-    	$this->_cachedSelectedValue=$value;
-    }
-
-
-	/**
-	 * @return array list of the selected item values (strings)
-	 */
-	public function getSelectedValues()
-	{
-		$values=array();
-		if($this->_items)
-		{
-			foreach($this->_items as $item)
-			{
-				if($item->getSelected())
-					$values[]=$item->getValue();
-			}
-		}
-		return $values;
-	}
-
-	/**
-	 * @param array list of the selected item values
-	 */
-	public function setSelectedValues($values)
-	{
-		if($this->_items)
-		{
-			$this->clearSelection();
-			$lookup=array();
-			foreach($this->_items as $item)
-				$lookup[$item->getValue()]=$item;
-			foreach($values as $value)
-			{
-				if(isset($lookup["$value"]))
-					$lookup["$value"]->setSelected(true);
-		    	else
-		    		throw new TInvalidDataValueException('listcontrol_selectedvalue_invalid',get_class($this),$value);
-			}
-		}
-	}
-
-    /**
-     * @return string selected value
-     */
-    public function getText()
-    {
-	    return $this->getSelectedValue();
-    }
-
-    /**
-     * @param string value to be selected
-     */
-    public function setText($value)
-    {
-	    $this->setSelectedValue($value);
-    }
-
-    /**
-     * Clears all existing selections.
-     */
-    public function clearSelection()
-    {
-	    if($this->_items)
-	    {
-		    foreach($this->_items as $item)
-		    	$item->setSelected(false);
-	    }
-    }
-
-	/**
-	 * @return string the group of validators which the list control causes validation upon postback
-	 */
-	public function getValidationGroup()
-	{
-		return $this->getViewState('ValidationGroup','');
-	}
-
-	/**
-	 * @param string the group of validators which the list control causes validation upon postback
-	 */
-	public function setValidationGroup($value)
-	{
-		$this->setViewState('ValidationGroup',$value,'');
-	}
-
-	/**
-	 * Raises OnSelectedIndexChanged event when selection is changed.
-	 * This method is invoked when the list control has its selection changed
-	 * by end-users.
-	 * @param TEventParameter event parameter
-	 */
-	public function onSelectedIndexChanged($param)
-	{
-		$this->raiseEvent('OnSelectedIndexChanged',$this,$param);
-		$this->onTextChanged($param);
-	}
-
-	/**
-	 * Raises OnTextChanged event when selection is changed.
-	 * This method is invoked when the list control has its selection changed
-	 * by end-users.
-	 * @param TEventParameter event parameter
-	 */
-	public function onTextChanged($param)
-	{
-		$this->raiseEvent('OnTextChanged',$this,$param);
-	}
-
-	/**
-	 * Renders body content of the list control.
-	 * This method renders items contained in the list control as the body content.
-	 * @param THtmlWriter writer
-	 */
-	public function renderContents($writer)
-	{
-		if($this->_items)
-		{
-			$writer->writeLine();
-			foreach($this->_items as $item)
-			{
-				if($item->getEnabled())
-				{
-					if($item->getSelected())
-						$writer->addAttribute('selected','selected');
-					$writer->addAttribute('value',$item->getValue());
-					if($item->getHasAttributes())
-					{
-						foreach($item->getAttributes() as $name=>$value)
-							$writer->addAttribute($name,$value);
-					}
-					$writer->renderBeginTag('option');
-					$writer->write(THttpUtility::htmlEncode($item->getText()));
-					$writer->renderEndTag();
-					$writer->writeLine();
-				}
-			}
-		}
-	}
-
-	/**
-	 * Formats the text value according to a format string.
-	 * If the format string is empty, the original value is converted into
-	 * a string and returned.
-	 * If the format string starts with '#', the string is treated as a PHP expression
-	 * within which the token '{0}' is translated with the data value to be formated.
-	 * Otherwise, the format string and the data value are passed
-	 * as the first and second parameters in {@link sprintf}.
-	 * @param string format string
-	 * @param mixed the data to be formatted
-	 * @return string the formatted result
-	 */
-	protected function formatDataValue($formatString,$value)
-	{
-		if($formatString==='')
-			return TPropertyValue::ensureString($value);
-		else if($formatString[0]==='#')
-		{
-			$expression=strtr(substr($formatString,1),array('{0}'=>'$value'));
-			try
-			{
-				if(eval("\$result=$expression;")===false)
-					throw new Exception('');
-				return $result;
-			}
-			catch(Exception $e)
-			{
-				throw new TInvalidDataValueException('listcontrol_expression_invalid',get_class($this),$expression,$e->getMessage());
-			}
-		}
-		else
-			return sprintf($formatString,$value);
-	}
-}
-
-/**
- * TListItemCollection class.
- *
- * TListItemCollection maintains a list of {@link TListItem} for {@link TListControl}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $  $Date: $
- * @package System.Web.UI.WebControls
- * @since 3.0
- */
-class TListItemCollection extends TList
-{
-	/**
-	 * Creates a list item object.
-	 * This method may be overriden to provide a customized list item object.
-	 * @param integer index where the newly created item is to be inserted at.
-	 * If -1, the item will be appended to the end.
-	 * @return TListItem list item object
-	 */
-	public function createListItem($index=-1)
-	{
-		$item=new TListItem;
-		if($index<0)
-			$this->add($item);
-		else
-			$this->insertAt($index,$item);
-		return $item;
-	}
-
-	/**
-	 * Inserts an item into the collection.
-	 * @param integer the location where the item will be inserted.
-	 * The current item at the place and the following ones will be moved backward.
-	 * @param TListItem the item to be inserted.
-	 * @throws TInvalidDataTypeException if the item being inserted is neither a string nor TListItem
-	 */
-	public function insertAt($index,$item)
-	{
-		if($item instanceof TListItem)
-			parent::insertAt($index,$item);
-		else if(is_string($item))
-		{
-			$item=$this->createListItem($index);
-			$item->setText($item);
-		}
-		else
-			throw new TInvalidDataTypeException('listitemcollection_item_invalid',get_class($this));
-	}
-
-	/**
-	 * Finds the lowest cardinal index of the item whose value is the one being looked for.
-	 * @param string the value to be looked for
-	 * @param boolean whether to look for disabled items also
-	 * @return integer the index of the item found, -1 if not found.
-	 */
-	public function findIndexByValue($value,$includeDisabled=true)
-	{
-		$value=TPropertyValue::ensureString($value);
-		$index=0;
-		foreach($this as $item)
-		{
-			if($item->getValue()===$value && ($includeDisabled || $item->getEnabled()))
-				return $index;
-			$index++;
-		}
-		return -1;
-	}
-
-	/**
-	 * Finds the lowest cardinal index of the item whose text is the one being looked for.
-	 * @param string the text to be looked for
-	 * @param boolean whether to look for disabled items also
-	 * @return integer the index of the item found, -1 if not found.
-	 */
-	public function findIndexByText($text,$includeDisabled=true)
-	{
-		$text=TPropertyValue::ensureString($text);
-		$index=0;
-		foreach($this as $item)
-		{
-			if($item->getText()===$text && ($includeDisabled || $item->getEnabled()))
-				return $index;
-			$index++;
-		}
-		return -1;
-	}
-
-	/**
-	 * Finds the item whose value is the one being looked for.
-	 * @param string the value to be looked for
-	 * @param boolean whether to look for disabled items also
-	 * @return TListItem the item found, null if not found.
-	 */
-	public function findItemByValue($value,$includeDisabled=true)
-	{
-		if(($index=$this->findIndexByValue($value,$includeDisabled))>=0)
-			return $this->itemAt($index);
-		else
-			return null;
-	}
-
-	/**
-	 * Finds the item whose text is the one being looked for.
-	 * @param string the text to be looked for
-	 * @param boolean whether to look for disabled items also
-	 * @return TListItem the item found, null if not found.
-	 */
-	public function findItemByText($text,$includeDisabled=true)
-	{
-		if(($index=$this->findIndexByText($text,$includeDisabled))>=0)
-			return $this->itemAt($index);
-		else
-			return null;
-	}
-
-	/**
-	 * Loads state into every item in the collection.
-	 * This method should only be used by framework and control developers.
-	 * @param array|null state to be loaded.
-	 */
-	public function loadState($state)
-	{
-		$this->clear();
-		if($state!==null)
-			$this->copyFrom($state);
-	}
-
-	/**
-	 * Saves state of items.
-	 * This method should only be used by framework and control developers.
-	 * @return array|null the saved state
-	 */
-	public function saveState()
-	{
-		return ($this->getCount()>0) ? $this->toArray() : null;
-	}
-}
-
-?>
+<?php
+/**
+ * TListControl class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Revision: $  $Date: $
+ * @package System.Web.UI.WebControls
+ */
+
+/**
+ * Includes the supporting classes
+ */
+Prado::using('System.Web.UI.WebControls.TDataBoundControl');
+Prado::using('System.Web.UI.WebControls.TListItem');
+Prado::using('System.Collections.TAttributeCollection');
+Prado::using('System.Util.TDataFieldAccessor');
+
+
+/**
+ * TListControl class
+ *
+ * TListControl is a base class for list controls, such as {@link TListBox},
+ * {@link TDropDownList}, {@link TCheckBoxList}, etc.
+ * It manages the items and their status in a list control.
+ * It also implements how the items can be populated from template and
+ * data source.
+ *
+ * The property {@link getItems} returns a list of the items in the control.
+ * To specify or determine which item is selected, use the
+ * {@link getSelectedIndex SelectedIndex} property that indicates the zero-based
+ * index of the selected item in the item list. You may also use
+ * {@link getSelectedItem SelectedItem} and {@link getSelectedValue SelectedValue}
+ * to get the selected item and its value. For multiple selection lists
+ * (such as {@link TCheckBoxList} and {@link TListBox}), property
+ * {@link getSelectedIndices SelectedIndices} is useful.
+ *
+ * TListControl implements {@link setAutoPostBack AutoPostBack} which allows
+ * a list control to postback the page if the selections of the list items are changed.
+ * The {@link setCausesValidation CausesValidation} and {@link setValidationGroup ValidationGroup}
+ * properties may be used to specify that validation be performed when auto postback occurs.
+ *
+ * There are three ways to populate the items in a list control: from template,
+ * using {@link setDataSource DataSource} and using {@link setDataSourceID DataSourceID}.
+ * The latter two are covered in {@link TDataBoundControl}. To specify items via
+ * template, using the following template syntax:
+ * <code>
+ * <com:TListControl>
+ *   <com:TListItem Value="xxx" Text="yyy" >
+ *   <com:TListItem Value="xxx" Text="yyy" Selected="true" >
+ *   <com:TListItem Value="xxx" Text="yyy" >
+ * </com:TListControl>
+ * </code>
+ *
+ * When {@link setDataSource DataSource} or {@link setDataSourceID DataSourceID}
+ * is used to populate list items, the {@link setDataTextField DataTextField} and
+ * {@link setDataValueField DataValueField} properties are used to specify which
+ * columns of the data will be used to populate the text and value of the items.
+ * For example, if a data source is as follows,
+ * <code>
+ * $dataSource=array(
+ *    array('name'=>'John', 'age'=>31),
+ *    array('name'=>'Cary', 'age'=>28),
+ *    array('name'=>'Rose', 'age'=>35),
+ * );
+ * </code>
+ * setting {@link setDataTextField DataTextField} and {@link setDataValueField DataValueField}
+ * to 'name' and 'age' will make the first item's text be 'John', value be 31,
+ * the second item's text be 'Cary', value be 28, and so on.
+ * The {@link setDataTextFormatString DataTextFormatString} property may be further
+ * used to format how the item should be displayed. See {@link formatDataValue()}
+ * for an explanation of the format string.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $  $Date: $
+ * @package System.Web.UI.WebControls
+ * @since 3.0
+ */
+abstract class TListControl extends TDataBoundControl
+{
+	/**
+	 * @var TListItemCollection item list
+	 */
+	private $_items=null;
+	/**
+	 * @var boolean whether items are restored from viewstate
+	 */
+	private $_stateLoaded=false;
+	/**
+	 * @var mixed the following selection variables are used
+	 * to keep selections when Items are not available
+	 */
+	private $_cachedSelectedIndex=-1;
+	private $_cachedSelectedValue=null;
+
+	/**
+	 * @return string tag name of the list control
+	 */
+	protected function getTagName()
+	{
+		return 'select';
+	}
+
+	/**
+	 * Adds attributes to renderer.
+	 * @param THtmlWriter the renderer
+	 */
+	protected function addAttributesToRender($writer)
+	{
+		$page=$this->getPage();
+		$page->ensureRenderInForm($this);
+		if($this->getIsMultiSelect())
+			$writer->addAttribute('multiple','multiple');
+		if($this->getEnabled(true))
+		{
+			if($this->getAutoPostBack() && $page->getClientSupportsJavaScript())
+				$this->renderClientControlScript($writer);
+		}
+		else if($this->getEnabled())
+			$writer->addAttribute('disabled','disabled');
+		parent::addAttributesToRender($writer);
+	}
+
+	/**
+	 * Renders the javascript for list control.
+	 */
+	protected function renderClientControlScript($writer)
+	{
+		$writer->addAttribute('id',$this->getClientID());
+		$this->getPage()->getClientScript()->registerPostBackControl($this->getClientClassName(),$this->getPostBackOptions());
+	}
+
+	/**
+	 * Gets the name of the javascript class responsible for performing postback for this control.
+	 * Derived classes may override this method and return customized js class names.
+	 * @return string the javascript class name
+	 */
+	protected function getClientClassName()
+	{
+		return 'Prado.WebUI.TListControl';
+	}
+
+	/**
+	 * @return array postback options for JS postback code
+	 */
+	protected function getPostBackOptions()
+	{
+		$options['ID'] = $this->getClientID();
+		$options['CausesValidation'] = $this->getCausesValidation();
+		$options['ValidationGroup'] = $this->getValidationGroup();
+		$options['EventTarget'] = $this->getUniqueID();
+		return $options;
+	}
+
+	/**
+	 * Adds object parsed from template to the control.
+	 * This method adds only {@link TListItem} objects into the {@link getItems Items} collection.
+	 * All other objects are ignored.
+	 * @param mixed object parsed from template
+	 */
+	public function addParsedObject($object)
+	{
+		// Do not add items from template if items are loaded from viewstate
+		if(!$this->_stateLoaded && ($object instanceof TListItem))
+		{
+			$index=$this->getItems()->add($object);
+			if(($this->_cachedSelectedValue!==null && $this->_cachedSelectedValue===$object->getValue()) || ($this->_cachedSelectedIndex===$index))
+			{
+				$object->setSelected(true);
+				$this->_cachedSelectedValue=null;
+				$this->_cachedSelectedIndex=-1;
+			}
+		}
+	}
+
+	/**
+	 * Performs databinding to populate list items from data source.
+	 * This method is invoked by dataBind().
+	 * You may override this function to provide your own way of data population.
+	 * @param Traversable the data
+	 */
+	protected function performDataBinding($data)
+	{
+		$items=$this->getItems();
+		if(!$this->getAppendDataBoundItems())
+			$items->clear();
+		$textField=$this->getDataTextField();
+		if($textField==='')
+			$textField=0;
+		$valueField=$this->getDataValueField();
+		if($valueField==='')
+			$valueField=1;
+		$textFormat=$this->getDataTextFormatString();
+		foreach($data as $key=>$object)
+		{
+			$item=$items->createListItem();
+			if(is_array($object) || is_object($object))
+			{
+				$text=TDataFieldAccessor::getDataFieldValue($object,$textField);
+				$value=TDataFieldAccessor::getDataFieldValue($object,$valueField);
+				$item->setValue($value);
+			}
+			else
+			{
+				$text=$object;
+				$item->setValue("$key");
+			}
+			$item->setText($this->formatDataValue($textFormat,$text));
+		}
+		// SelectedValue or SelectedIndex may be set before databinding
+		// so we make them be effective now
+		if($this->_cachedSelectedValue!==null)
+		{
+			$index=$items->findIndexByValue($this->_cachedSelectedValue);
+			if($index===-1 || ($this->_cachedSelectedIndex!==-1 && $this->_cachedSelectedIndex!==$index))
+				throw new TInvalidDataValueException('listcontrol_selection_invalid',get_class($this));
+			$this->setSelectedIndex($index);
+			$this->_cachedSelectedValue=null;
+			$this->_cachedSelectedIndex=-1;
+		}
+		else if($this->_cachedSelectedIndex!==-1)
+		{
+			$this->setSelectedIndex($this->_cachedSelectedIndex);
+			$this->_cachedSelectedIndex=-1;
+		}
+	}
+
+	/**
+	 * Creates a collection object to hold list items.
+	 * This method may be overriden to create a customized collection.
+	 * @return TListItemCollection the collection object
+	 */
+	protected function createListItemCollection()
+	{
+		return new TListItemCollection;
+	}
+
+	/**
+	 * Saves items into viewstate.
+	 * This method is invoked right before control state is to be saved.
+	 */
+	public function saveState()
+	{
+		parent::saveState();
+		if($this->_items)
+			$this->setViewState('Items',$this->_items->saveState(),null);
+		else
+			$this->clearViewState('Items');
+	}
+
+	/**
+	 * Loads items from viewstate.
+	 * This method is invoked right after control state is loaded.
+	 */
+	public function loadState()
+	{
+		parent::loadState();
+		$this->_stateLoaded=true;
+		if(!$this->getIsDataBound())
+		{
+			$this->_items=$this->createListItemCollection();
+			$this->_items->loadState($this->getViewState('Items',null));
+		}
+		$this->clearViewState('Items');
+	}
+
+	/**
+	 * @return boolean whether this is a multiselect control. Defaults to false.
+	 */
+	protected function getIsMultiSelect()
+	{
+		return false;
+	}
+
+	/**
+	 * @return boolean whether performing databind should append items or clear the existing ones. Defaults to false.
+	 */
+	public function getAppendDataBoundItems()
+	{
+		return $this->getViewState('AppendDataBoundItems',false);
+	}
+
+	/**
+	 * @param boolean whether performing databind should append items or clear the existing ones.
+	 */
+	public function setAppendDataBoundItems($value)
+	{
+		$this->setViewState('AppendDataBoundItems',TPropertyValue::ensureBoolean($value),false);
+	}
+
+	/**
+	 * @return boolean a value indicating whether an automatic postback to the server
+     * will occur whenever the user makes change to the list control and then tabs out of it.
+     * Defaults to false.
+	 */
+	public function getAutoPostBack()
+	{
+		return $this->getViewState('AutoPostBack',false);
+	}
+
+	/**
+	 * Sets the value indicating if postback automatically.
+	 * An automatic postback to the server will occur whenever the user
+	 * makes change to the list control and then tabs out of it.
+	 * @param boolean the value indicating if postback automatically
+	 */
+	public function setAutoPostBack($value)
+	{
+		$this->setViewState('AutoPostBack',TPropertyValue::ensureBoolean($value),false);
+	}
+
+	/**
+	 * @return boolean whether postback event trigger by this list control will cause input validation, default is true.
+	 */
+	public function getCausesValidation()
+	{
+		return $this->getViewState('CausesValidation',true);
+	}
+
+	/**
+	 * @param boolean whether postback event trigger by this list control will cause input validation.
+	 */
+	public function setCausesValidation($value)
+	{
+		$this->setViewState('CausesValidation',TPropertyValue::ensureBoolean($value),true);
+	}
+
+	/**
+	 * @return string the field of the data source that provides the text content of the list items.
+	 */
+	public function getDataTextField()
+	{
+		return $this->getViewState('DataTextField','');
+	}
+
+	/**
+	 * @param string the field of the data source that provides the text content of the list items.
+	 */
+	public function setDataTextField($value)
+	{
+		$this->setViewState('DataTextField',$value,'');
+	}
+
+	/**
+	 * @return string the formatting string used to control how data bound to the list control is displayed.
+	 */
+	public function getDataTextFormatString()
+	{
+		return $this->getViewState('DataTextFormatString','');
+	}
+
+	/**
+	 * Sets data text format string.
+	 * The format string is used in {@link TDataValueFormatter::format()} to format the Text property value
+	 * of each item in the list control.
+	 * @param string the formatting string used to control how data bound to the list control is displayed.
+	 * @see TDataValueFormatter::format()
+	 */
+	public function setDataTextFormatString($value)
+	{
+		$this->setViewState('DataTextFormatString',$value,'');
+	}
+
+	/**
+	 * @return string the field of the data source that provides the value of each list item.
+	 */
+	public function getDataValueField()
+	{
+		return $this->getViewState('DataValueField','');
+	}
+
+	/**
+	 * @param string the field of the data source that provides the value of each list item.
+	 */
+	public function setDataValueField($value)
+	{
+		$this->setViewState('DataValueField',$value,'');
+	}
+
+	/**
+	 * @return integer the number of items in the list control
+	 */
+	public function getItemCount()
+	{
+		return $this->_items?$this->_items->getCount():0;
+	}
+
+	/**
+	 * @return boolean whether the list control contains any items.
+	 */
+	public function getHasItems()
+	{
+		return ($this->_items && $this->_items->getCount()>0);
+	}
+
+	/**
+	 * @return TListItemCollection the item collection
+	 */
+	public function getItems()
+	{
+		if(!$this->_items)
+			$this->_items=$this->createListItemCollection();
+		return $this->_items;
+	}
+
+	/**
+	 * @return integer the index (zero-based) of the item being selected, -1 if no item is selected.
+	 */
+	public function getSelectedIndex()
+	{
+		if($this->_items)
+		{
+			$n=$this->_items->getCount();
+			for($i=0;$i<$n;++$i)
+				if($this->_items->itemAt($i)->getSelected())
+					return $i;
+		}
+		return -1;
+	}
+
+	/**
+	 * @param integer the index (zero-based) of the item to be selected
+	 */
+	public function setSelectedIndex($index)
+	{
+		if(($index=TPropertyValue::ensureInteger($index))<0)
+			$index=-1;
+		if($this->_items)
+		{
+			$this->clearSelection();
+			if($index>=0 && $index<$this->_items->getCount())
+				$this->_items->itemAt($index)->setSelected(true);
+			else if($index!==-1)
+				throw new TInvalidDataValueException('listcontrol_selectedindex_invalid',get_class($this),$index);
+		}
+		$this->_cachedSelectedIndex=$index;
+	}
+
+	/**
+	 * @return array list of index of items that are selected
+	 */
+	public function getSelectedIndices()
+	{
+		$selections=array();
+		if($this->_items)
+		{
+			$n=$this->_items->getCount();
+			for($i=0;$i<$n;++$i)
+				if($this->_items->itemAt($i)->getSelected())
+					$selections[]=$i;
+		}
+		return $selections;
+	}
+
+	/**
+	 * @param array list of index of items to be selected
+	 */
+	public function setSelectedIndices($indices)
+	{
+		if($this->_items)
+		{
+			$this->clearSelection();
+			$n=$this->_items->getCount();
+			foreach($indices as $index)
+			{
+				if($index>=0 && $index<$n)
+					$this->_items->itemAt($index)->setSelected(true);
+			}
+		}
+	}
+
+	/**
+	 * @return TListItem|null the selected item with the lowest cardinal index, null if no item is selected.
+	 */
+	public function getSelectedItem()
+	{
+		if(($index=$this->getSelectedIndex())>=0)
+			return $this->_items->itemAt($index);
+		else
+			return null;
+	}
+
+	/**
+	 * @return string the value of the selected item with the lowest cardinal index, empty if no selection
+	 */
+	public function getSelectedValue()
+	{
+		$index=$this->getSelectedIndex();
+		return $index>=0?$this->getItems()->itemAt($index)->getValue():'';
+	}
+
+	/**
+	 * Sets selection by item value.
+	 * Existing selections will be cleared if the item value is found in the item collection.
+	 * Note, if the value is null, existing selections will also be cleared.
+	 * @param string the value of the item to be selected.
+	 */
+	public function setSelectedValue($value)
+    {
+	    if($this->_items)
+	    {
+		    if($value===null)
+		    	$this->clearSelection();
+		    else if(($item=$this->_items->findItemByValue($value))!==null)
+	    	{
+		    	$this->clearSelection();
+		    	$item->setSelected(true);
+	    	}
+	    	else
+	    		throw new TInvalidDataValueException('listcontrol_selectedvalue_invalid',get_class($this),$value);
+    	}
+    	$this->_cachedSelectedValue=$value;
+    }
+
+
+	/**
+	 * @return array list of the selected item values (strings)
+	 */
+	public function getSelectedValues()
+	{
+		$values=array();
+		if($this->_items)
+		{
+			foreach($this->_items as $item)
+			{
+				if($item->getSelected())
+					$values[]=$item->getValue();
+			}
+		}
+		return $values;
+	}
+
+	/**
+	 * @param array list of the selected item values
+	 */
+	public function setSelectedValues($values)
+	{
+		if($this->_items)
+		{
+			$this->clearSelection();
+			$lookup=array();
+			foreach($this->_items as $item)
+				$lookup[$item->getValue()]=$item;
+			foreach($values as $value)
+			{
+				if(isset($lookup["$value"]))
+					$lookup["$value"]->setSelected(true);
+		    	else
+		    		throw new TInvalidDataValueException('listcontrol_selectedvalue_invalid',get_class($this),$value);
+			}
+		}
+	}
+
+    /**
+     * @return string selected value
+     */
+    public function getText()
+    {
+	    return $this->getSelectedValue();
+    }
+
+    /**
+     * @param string value to be selected
+     */
+    public function setText($value)
+    {
+	    $this->setSelectedValue($value);
+    }
+
+    /**
+     * Clears all existing selections.
+     */
+    public function clearSelection()
+    {
+	    if($this->_items)
+	    {
+		    foreach($this->_items as $item)
+		    	$item->setSelected(false);
+	    }
+    }
+
+	/**
+	 * @return string the group of validators which the list control causes validation upon postback
+	 */
+	public function getValidationGroup()
+	{
+		return $this->getViewState('ValidationGroup','');
+	}
+
+	/**
+	 * @param string the group of validators which the list control causes validation upon postback
+	 */
+	public function setValidationGroup($value)
+	{
+		$this->setViewState('ValidationGroup',$value,'');
+	}
+
+	/**
+	 * Raises OnSelectedIndexChanged event when selection is changed.
+	 * This method is invoked when the list control has its selection changed
+	 * by end-users.
+	 * @param TEventParameter event parameter
+	 */
+	public function onSelectedIndexChanged($param)
+	{
+		$this->raiseEvent('OnSelectedIndexChanged',$this,$param);
+		$this->onTextChanged($param);
+	}
+
+	/**
+	 * Raises OnTextChanged event when selection is changed.
+	 * This method is invoked when the list control has its selection changed
+	 * by end-users.
+	 * @param TEventParameter event parameter
+	 */
+	public function onTextChanged($param)
+	{
+		$this->raiseEvent('OnTextChanged',$this,$param);
+	}
+
+	/**
+	 * Renders body content of the list control.
+	 * This method renders items contained in the list control as the body content.
+	 * @param THtmlWriter writer
+	 */
+	public function renderContents($writer)
+	{
+		if($this->_items)
+		{
+			$writer->writeLine();
+			foreach($this->_items as $item)
+			{
+				if($item->getEnabled())
+				{
+					if($item->getSelected())
+						$writer->addAttribute('selected','selected');
+					$writer->addAttribute('value',$item->getValue());
+					if($item->getHasAttributes())
+					{
+						foreach($item->getAttributes() as $name=>$value)
+							$writer->addAttribute($name,$value);
+					}
+					$writer->renderBeginTag('option');
+					$writer->write(THttpUtility::htmlEncode($item->getText()));
+					$writer->renderEndTag();
+					$writer->writeLine();
+				}
+			}
+		}
+	}
+
+	/**
+	 * Formats the text value according to a format string.
+	 * If the format string is empty, the original value is converted into
+	 * a string and returned.
+	 * If the format string starts with '#', the string is treated as a PHP expression
+	 * within which the token '{0}' is translated with the data value to be formated.
+	 * Otherwise, the format string and the data value are passed
+	 * as the first and second parameters in {@link sprintf}.
+	 * @param string format string
+	 * @param mixed the data to be formatted
+	 * @return string the formatted result
+	 */
+	protected function formatDataValue($formatString,$value)
+	{
+		if($formatString==='')
+			return TPropertyValue::ensureString($value);
+		else if($formatString[0]==='#')
+		{
+			$expression=strtr(substr($formatString,1),array('{0}'=>'$value'));
+			try
+			{
+				if(eval("\$result=$expression;")===false)
+					throw new Exception('');
+				return $result;
+			}
+			catch(Exception $e)
+			{
+				throw new TInvalidDataValueException('listcontrol_expression_invalid',get_class($this),$expression,$e->getMessage());
+			}
+		}
+		else
+			return sprintf($formatString,$value);
+	}
+}
+
+/**
+ * TListItemCollection class.
+ *
+ * TListItemCollection maintains a list of {@link TListItem} for {@link TListControl}.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $  $Date: $
+ * @package System.Web.UI.WebControls
+ * @since 3.0
+ */
+class TListItemCollection extends TList
+{
+	/**
+	 * Creates a list item object.
+	 * This method may be overriden to provide a customized list item object.
+	 * @param integer index where the newly created item is to be inserted at.
+	 * If -1, the item will be appended to the end.
+	 * @return TListItem list item object
+	 */
+	public function createListItem($index=-1)
+	{
+		$item=new TListItem;
+		if($index<0)
+			$this->add($item);
+		else
+			$this->insertAt($index,$item);
+		return $item;
+	}
+
+	/**
+	 * Inserts an item into the collection.
+	 * @param integer the location where the item will be inserted.
+	 * The current item at the place and the following ones will be moved backward.
+	 * @param TListItem the item to be inserted.
+	 * @throws TInvalidDataTypeException if the item being inserted is neither a string nor TListItem
+	 */
+	public function insertAt($index,$item)
+	{
+		if($item instanceof TListItem)
+			parent::insertAt($index,$item);
+		else if(is_string($item))
+		{
+			$item=$this->createListItem($index);
+			$item->setText($item);
+		}
+		else
+			throw new TInvalidDataTypeException('listitemcollection_item_invalid',get_class($this));
+	}
+
+	/**
+	 * Finds the lowest cardinal index of the item whose value is the one being looked for.
+	 * @param string the value to be looked for
+	 * @param boolean whether to look for disabled items also
+	 * @return integer the index of the item found, -1 if not found.
+	 */
+	public function findIndexByValue($value,$includeDisabled=true)
+	{
+		$value=TPropertyValue::ensureString($value);
+		$index=0;
+		foreach($this as $item)
+		{
+			if($item->getValue()===$value && ($includeDisabled || $item->getEnabled()))
+				return $index;
+			$index++;
+		}
+		return -1;
+	}
+
+	/**
+	 * Finds the lowest cardinal index of the item whose text is the one being looked for.
+	 * @param string the text to be looked for
+	 * @param boolean whether to look for disabled items also
+	 * @return integer the index of the item found, -1 if not found.
+	 */
+	public function findIndexByText($text,$includeDisabled=true)
+	{
+		$text=TPropertyValue::ensureString($text);
+		$index=0;
+		foreach($this as $item)
+		{
+			if($item->getText()===$text && ($includeDisabled || $item->getEnabled()))
+				return $index;
+			$index++;
+		}
+		return -1;
+	}
+
+	/**
+	 * Finds the item whose value is the one being looked for.
+	 * @param string the value to be looked for
+	 * @param boolean whether to look for disabled items also
+	 * @return TListItem the item found, null if not found.
+	 */
+	public function findItemByValue($value,$includeDisabled=true)
+	{
+		if(($index=$this->findIndexByValue($value,$includeDisabled))>=0)
+			return $this->itemAt($index);
+		else
+			return null;
+	}
+
+	/**
+	 * Finds the item whose text is the one being looked for.
+	 * @param string the text to be looked for
+	 * @param boolean whether to look for disabled items also
+	 * @return TListItem the item found, null if not found.
+	 */
+	public function findItemByText($text,$includeDisabled=true)
+	{
+		if(($index=$this->findIndexByText($text,$includeDisabled))>=0)
+			return $this->itemAt($index);
+		else
+			return null;
+	}
+
+	/**
+	 * Loads state into every item in the collection.
+	 * This method should only be used by framework and control developers.
+	 * @param array|null state to be loaded.
+	 */
+	public function loadState($state)
+	{
+		$this->clear();
+		if($state!==null)
+			$this->copyFrom($state);
+	}
+
+	/**
+	 * Saves state of items.
+	 * This method should only be used by framework and control developers.
+	 * @return array|null the saved state
+	 */
+	public function saveState()
+	{
+		return ($this->getCount()>0) ? $this->toArray() : null;
+	}
+}
+
+?>