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