CDataProvider

所有包 | 属性 | 方法

包	system.web
继承	abstract class CDataProvider » CComponent
实现	IDataProvider
子类	CActiveDataProvider, CArrayDataProvider, CSqlDataProvider
可用自	1.1
源码	framework/web/CDataProvider.php

CDataProvider is a base class that implements the IDataProvider interface.

Derived classes mainly need to implement three methods: fetchData, fetchKeys and calculateTotalItemCount.

公共属性

隐藏继承的属性

属性	类型	描述	被定义在
data	array	Returns the data items currently available.	CDataProvider
id	string	Returns the ID that uniquely identifies the data provider.	CDataProvider
itemCount	integer	Returns the number of data items in the current page.	CDataProvider
keys	array	Returns the key values associated with the data items.	CDataProvider
pagination	CPagination\|false	Returns the pagination object.	CDataProvider
sort	CSort\|false	Returns the sort object.	CDataProvider
totalItemCount	integer	Returns the total number of data items.	CDataProvider

公共方法

隐藏继承的方法

方法	描述	被定义在
__call()	Calls the named method which is not a class method.	CComponent
__get()	Returns a property value, an event handler list or a behavior based on its name.	CComponent
__isset()	Checks if a property value is null.	CComponent
__set()	Sets value of a component property.	CComponent
__unset()	Sets a component property to be null.	CComponent
asa()	Returns the named behavior object.	CComponent
attachBehavior()	Attaches a behavior to this component.	CComponent
attachBehaviors()	Attaches a list of behaviors to the component.	CComponent
attachEventHandler()	Attaches an event handler to an event.	CComponent
canGetProperty()	Determines whether a property can be read.	CComponent
canSetProperty()	Determines whether a property can be set.	CComponent
detachBehavior()	Detaches a behavior from the component.	CComponent
detachBehaviors()	Detaches all behaviors from the component.	CComponent
detachEventHandler()	Detaches an existing event handler.	CComponent
disableBehavior()	Disables an attached behavior.	CComponent
disableBehaviors()	Disables all behaviors attached to this component.	CComponent
enableBehavior()	Enables an attached behavior.	CComponent
enableBehaviors()	Enables all behaviors attached to this component.	CComponent
evaluateExpression()	Evaluates a PHP expression or callback under the context of this component.	CComponent
getData()	Returns the data items currently available.	CDataProvider
getEventHandlers()	Returns the list of attached event handlers for an event.	CComponent
getId()	Returns the ID that uniquely identifies the data provider.	CDataProvider
getItemCount()	Returns the number of data items in the current page.	CDataProvider
getKeys()	Returns the key values associated with the data items.	CDataProvider
getPagination()	Returns the pagination object.	CDataProvider
getSort()	Returns the sort object.	CDataProvider
getTotalItemCount()	Returns the total number of data items.	CDataProvider
hasEvent()	Determines whether an event is defined.	CComponent
hasEventHandler()	Checks whether the named event has attached handlers.	CComponent
hasProperty()	Determines whether a property is defined.	CComponent
raiseEvent()	Raises an event.	CComponent
setData()	Sets the data items for this provider.	CDataProvider
setId()	Sets the provider ID.	CDataProvider
setKeys()	Sets the data item keys for this provider.	CDataProvider
setPagination()	Sets the pagination for this data provider.	CDataProvider
setSort()	Sets the sorting for this data provider.	CDataProvider
setTotalItemCount()	Sets the total number of data items.	CDataProvider

受保护的方法

隐藏继承的方法

方法	描述	被定义在
calculateTotalItemCount()	Calculates the total number of data items.	CDataProvider
fetchData()	Fetches the data from the persistent data storage.	CDataProvider
fetchKeys()	Fetches the data item keys from the persistent data storage.	CDataProvider

属性详情

data 属性

public array getData(boolean $refresh=false)
public void setData(array $value)

Returns the data items currently available.

id 属性

public string getId()
public void setId(string $value)

Returns the ID that uniquely identifies the data provider.

itemCount 属性只读

public integer getItemCount(boolean $refresh=false)

Returns the number of data items in the current page. This is equivalent to count($provider->getData()). When pagination is set false, this returns the same value as totalItemCount.

keys 属性

public array getKeys(boolean $refresh=false)
public void setKeys(array $value)

Returns the key values associated with the data items.

pagination 属性

public CPagination|false getPagination(string $className='CPagination')
public void setPagination(mixed $value)

Returns the pagination object.

sort 属性

public CSort|false getSort(string $className='CSort')
public void setSort(mixed $value)

Returns the sort object.

totalItemCount 属性

public integer getTotalItemCount(boolean $refresh=false)
public void setTotalItemCount(integer $value)

Returns the total number of data items. When pagination is set false, this returns the same value as itemCount.

方法详情

calculateTotalItemCount() 方法

abstract protected integer calculateTotalItemCount()
{return}	integer	the total number of data items.

源码： framework/web/CDataProvider.php#44 (显示)


abstract protected function calculateTotalItemCount();

Calculates the total number of data items.

fetchData() 方法

abstract protected array fetchData()
{return}	array	list of data items

源码： framework/web/CDataProvider.php#34 (显示)


abstract protected function fetchData();

Fetches the data from the persistent data storage.

fetchKeys() 方法

abstract protected array fetchKeys()
{return}	array	list of data item keys.

源码： framework/web/CDataProvider.php#39 (显示)


abstract protected function fetchKeys();

Fetches the data item keys from the persistent data storage.

getData() 方法

public array getData(boolean $refresh=false)
$refresh	boolean	whether the data should be re-fetched from persistent storage.
{return}	array	the list of data items currently available in this data provider.

源码： framework/web/CDataProvider.php#165 (显示)


public function getData($refresh=false)
{
    if($this->_data===null || $refresh)
        $this->_data=$this->fetchData();
    return $this->_data;
}

Returns the data items currently available.

getId() 方法

public string getId()
{return}	string	the unique ID that uniquely identifies the data provider among all data providers.

源码： framework/web/CDataProvider.php#50 (显示)


public function getId()
{
    return $this->_id;
}

Returns the ID that uniquely identifies the data provider.

getItemCount() 方法

public integer getItemCount(boolean $refresh=false)
$refresh	boolean	whether the number of data items should be re-calculated.
{return}	integer	the number of data items in the current page.

源码： framework/web/CDataProvider.php#210 (显示)


public function getItemCount($refresh=false)
{
    return count($this->getData($refresh));
}

Returns the number of data items in the current page. This is equivalent to count($provider->getData()). When pagination is set false, this returns the same value as totalItemCount.

getKeys() 方法

public array getKeys(boolean $refresh=false)
$refresh	boolean	whether the keys should be re-calculated.
{return}	array	the list of key values corresponding to data. Each data item in data is uniquely identified by the corresponding key value in this array.

源码： framework/web/CDataProvider.php#187 (显示)


public function getKeys($refresh=false)
{
    if($this->_keys===null || $refresh)
        $this->_keys=$this->fetchKeys();
    return $this->_keys;
}

Returns the key values associated with the data items.

getPagination() 方法

public CPagination\|false getPagination(string $className='CPagination')
$className	string	the pagination object class name. Parameter is available since version 1.1.13.
{return}	CPagination\|false	the pagination object. If this is false, it means the pagination is disabled.

源码： framework/web/CDataProvider.php#69 (显示)


public function getPagination($className='CPagination')
{
    if($this->_pagination===null)
    {
        $this->_pagination=new $className;
        if(($id=$this->getId())!='')
            $this->_pagination->pageVar=$id.'_page';
    }
    return $this->_pagination;
}

Returns the pagination object.

getSort() 方法

public CSort\|false getSort(string $className='CSort')
$className	string	the sorting object class name. Parameter is available since version 1.1.13.
{return}	CSort\|false	the sorting object. If this is false, it means the sorting is disabled.

源码： framework/web/CDataProvider.php#117 (显示)


public function getSort($className='CSort')
{
    if($this->_sort===null)
    {
        $this->_sort=new $className;
        if(($id=$this->getId())!='')
            $this->_sort->sortVar=$id.'_sort';
    }
    return $this->_sort;
}

Returns the sort object.

getTotalItemCount() 方法

public integer getTotalItemCount(boolean $refresh=false)
$refresh	boolean	whether the total number of data items should be re-calculated.
{return}	integer	total number of possible data items.

源码： framework/web/CDataProvider.php#221 (显示)


public function getTotalItemCount($refresh=false)
{
    if($this->_totalItemCount===null || $refresh)
        $this->_totalItemCount=$this->calculateTotalItemCount();
    return $this->_totalItemCount;
}

Returns the total number of data items. When pagination is set false, this returns the same value as itemCount.

setData() 方法

public void setData(array $value)
$value	array	put the data items into this provider.

源码： framework/web/CDataProvider.php#176 (显示)


public function setData($value)
{
    $this->_data=$value;
}

Sets the data items for this provider.

setId() 方法

public void setId(string $value)
$value	string	the unique ID that uniquely identifies the data provider among all data providers.

源码： framework/web/CDataProvider.php#59 (显示)


public function setId($value)
{
    $this->_id=$value;
}

Sets the provider ID.

setKeys() 方法

public void setKeys(array $value)
$value	array	put the data item keys into this provider.

源码： framework/web/CDataProvider.php#198 (显示)


public function setKeys($value)
{
    $this->_keys=$value;
}

Sets the data item keys for this provider.

setPagination() 方法

public void setPagination(mixed $value)
$value	mixed	the pagination to be used by this data provider. This could be a CPagination object or an array used to configure the pagination object. If this is false, it means the pagination should be disabled. You can configure this property same way as a component: array( 'class' => 'MyPagination', 'pageSize' => 20, ),

源码： framework/web/CDataProvider.php#93 (显示)


public function setPagination($value)
{
    if(is_array($value))
    {
        if(isset($value['class']))
        {
            $pagination=$this->getPagination($value['class']);
            unset($value['class']);
        }
        else
            $pagination=$this->getPagination();

        foreach($value as $k=>$v)
            $pagination->$k=$v;
    }
    else
        $this->_pagination=$value;
}

Sets the pagination for this data provider.

setSort() 方法

public void setSort(mixed $value)
$value	mixed	the sorting to be used by this data provider. This could be a CSort object or an array used to configure the sorting object. If this is false, it means the sorting should be disabled. You can configure this property same way as a component: array( 'class' => 'MySort', 'attributes' => array('name', 'weight'), ),

源码： framework/web/CDataProvider.php#141 (显示)


public function setSort($value)
{
    if(is_array($value))
    {
        if(isset($value['class']))
        {
            $sort=$this->getSort($value['class']);
            unset($value['class']);
        }
        else
            $sort=$this->getSort();

        foreach($value as $k=>$v)
            $sort->$k=$v;
    }
    else
        $this->_sort=$value;
}

Sets the sorting for this data provider.

setTotalItemCount() 方法（自版本 v1.1.1 可用）

public void setTotalItemCount(integer $value)
$value	integer	the total number of data items.

源码： framework/web/CDataProvider.php#234 (显示)


public function setTotalItemCount($value)
{
    $this->_totalItemCount=$value;
}

Sets the total number of data items. This method is provided in case when the total number cannot be determined by calculateTotalItemCount.