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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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class Sample3 extends TPage
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{
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	private $_data=null;
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	protected function getData()
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	{
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		if($this->_data===null)
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			$this->loadData();
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		return $this->_data;
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	}
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	protected function loadData()
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	{
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		// We use viewstate keep track of data.
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		// In real applications, data should come from database using an SQL SELECT statement.
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		// In the following tabular data, field 'ISBN' is the primary key.
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		// All update and delete operations should come with an 'id' value in order to go through.
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		if(($this->_data=$this->getViewState('Data',null))===null)
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		{
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			$this->_data=array(
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				array(
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					'ISBN'=>'0596007124',
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					'title'=>'Head First Design Patterns',
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					'publisher'=>'O\'Reilly Media, Inc.',
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					'price'=>29.67,
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					'instock'=>true,
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					'rating'=>4,
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				),
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				array(
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					'ISBN'=>'0201633612',
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					'title'=>'Design Patterns: Elements of Reusable Object-Oriented Software',
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					'publisher'=>'Addison-Wesley Professional',
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					'price'=>47.04,
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					'instock'=>true,
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					'rating'=>5,
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				),
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				array(
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					'ISBN'=>'0321247140',
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					'title'=>'Design Patterns Explained : A New Perspective on Object-Oriented Design',
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					'publisher'=>'Addison-Wesley Professional',
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					'price'=>37.49,
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					'instock'=>true,
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					'rating'=>4,
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				),
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				array(
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					'ISBN'=>'0201485672',
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					'title'=>'Refactoring: Improving the Design of Existing Code',
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					'publisher'=>'Addison-Wesley Professional',
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					'price'=>47.14,
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					'instock'=>true,
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					'rating'=>3,
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				),
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				array(
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					'ISBN'=>'0321213351',
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					'title'=>'Refactoring to Patterns',
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					'publisher'=>'Addison-Wesley Professional',
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					'price'=>38.49,
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					'instock'=>true,
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					'rating'=>2,
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				),
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				array(
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					'ISBN'=>'0735619670',
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					'title'=>'Code Complete',
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					'publisher'=>'Microsoft Press',
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					'price'=>32.99,
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					'instock'=>false,
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					'rating'=>4,
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				),
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				array(
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					'ISBN'=>'0321278658 ',
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					'title'=>'Extreme Programming Explained : Embrace Change',
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					'publisher'=>'Addison-Wesley Professional',
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					'price'=>34.99,
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					'instock'=>true,
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					'rating'=>3,
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				),
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			);
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			$this->saveData();
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		}
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	}
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	protected function saveData()
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	{
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		$this->setViewState('Data',$this->_data);
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	}
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	protected function updateBook($isbn,$title,$publisher,$price,$instock,$rating)
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	{
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		// In real applications, data should be saved to database using an SQL UPDATE statement
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		if($this->_data===null)
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			$this->loadData();
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		$updateRow=null;
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		foreach($this->_data as $index=>$row)
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			if($row['ISBN']===$isbn)
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				$updateRow=&$this->_data[$index];
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		if($updateRow!==null)
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		{
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			$updateRow['title']=$title;
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			$updateRow['publisher']=$publisher;
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			$updateRow['price']=TPropertyValue::ensureFloat(ltrim($price,'$'));
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			$updateRow['instock']=TPropertyValue::ensureBoolean($instock);
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			$updateRow['rating']=TPropertyValue::ensureInteger($rating);
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			$this->saveData();
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		}
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	}
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	protected function deleteBook($isbn)
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	{
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		// In real applications, data should be saved to database using an SQL DELETE statement
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		if($this->_data===null)
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			$this->loadData();
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		$deleteIndex=-1;
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		foreach($this->_data as $index=>$row)
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			if($row['ISBN']===$isbn)
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				$deleteIndex=$index;
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		if($deleteIndex>=0)
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		{
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			unset($this->_data[$deleteIndex]);
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			$this->saveData();
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		}
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	}
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	public function onLoad($param)
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	{
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		parent::onLoad($param);
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		if(!$this->IsPostBack)
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		{
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			$this->DataGrid->DataSource=$this->Data;
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			$this->DataGrid->dataBind();
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		}
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	}
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	public function itemCreated($sender,$param)
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	{
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		$item=$param->Item;
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		if($item->ItemType==='EditItem')
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		{
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			// set column width of textboxes
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			$item->BookTitleColumn->TextBox->Columns=40;
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			$item->PriceColumn->TextBox->Columns=5;
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		}
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		if($item->ItemType==='Item' || $item->ItemType==='AlternatingItem' || $item->ItemType==='EditItem')
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		{
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			// add an aleart dialog to delete buttons
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			$item->DeleteColumn->Button->Attributes->onclick='if(!confirm(\'Are you sure?\')) return false;';
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		}
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	}
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	public function editItem($sender,$param)
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	{
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		$this->DataGrid->EditItemIndex=$param->Item->ItemIndex;
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		$this->DataGrid->DataSource=$this->Data;
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		$this->DataGrid->dataBind();
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	}
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	public function saveItem($sender,$param)
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	{
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		$item=$param->Item;
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		$this->updateBook(
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			$this->DataGrid->DataKeys[$item->ItemIndex],	// ISBN
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			$item->BookTitleColumn->TextBox->Text,			// title
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			$item->PublisherColumn->TextBox->Text,			// publisher
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			$item->PriceColumn->TextBox->Text,				// price
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			$item->InStockColumn->CheckBox->Checked,		// instock
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			$item->RatingColumn->DropDownList->SelectedValue		// rating
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			);
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		$this->DataGrid->EditItemIndex=-1;
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		$this->DataGrid->DataSource=$this->Data;
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		$this->DataGrid->dataBind();
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	}
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	public function cancelItem($sender,$param)
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	{
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		$this->DataGrid->EditItemIndex=-1;
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		$this->DataGrid->DataSource=$this->Data;
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		$this->DataGrid->dataBind();
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	}
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	public function deleteItem($sender,$param)
182 
	{
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		$this->deleteBook($this->DataGrid->DataKeys[$param->Item->ItemIndex]);
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		$this->DataGrid->EditItemIndex=-1;
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		$this->DataGrid->DataSource=$this->Data;
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		$this->DataGrid->dataBind();
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	}
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}
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?>