# Class yii\base\ViewEvent

Inheritance | yii\base\ViewEvent » yii\base\Event » yii\base\BaseObject
Implements | yii\base\Configurable
Available since version | 2.0
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/base/ViewEvent.php

ViewEvent represents events triggered by the yii\base\View component.

## Public Properties

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Property | Type | Description | Defined By
--- | --- | --- | ---
$data | mixed | The data that is passed to yii\base\Component::on() when attaching an event handler. | yii\base\Event
$handled | boolean | Whether the event is handled. | yii\base\Event
$isValid | boolean | Whether to continue rendering the view file. | yii\base\ViewEvent
$name | string | The event name. | yii\base\Event
$output | string | The rendering result of yii\base\View::renderFile(). | yii\base\ViewEvent
$params | array | The parameter array passed to the yii\base\View::render() method. | yii\base\ViewEvent
$sender | object | The sender of this event. | yii\base\Event
$viewFile | string | The view file being rendered. | yii\base\ViewEvent

## Public Methods

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Method | Description | Defined By
--- | --- | ---
__call() | Calls the named method which is not a class method. | yii\base\BaseObject
__construct() | Constructor. | yii\base\BaseObject
__get() | Returns the value of an object property. | yii\base\BaseObject
__isset() | Checks if a property is set, i.e. defined and not null. | yii\base\BaseObject
__set() | Sets value of an object property. | yii\base\BaseObject
__unset() | Sets an object property to null. | yii\base\BaseObject
canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\BaseObject
canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\BaseObject
className() | Returns the fully qualified name of this class. | yii\base\BaseObject
hasHandlers() | Returns a value indicating whether there is any handler attached to the specified class-level event. | yii\base\Event
hasMethod() | Returns a value indicating whether a method is defined. | yii\base\BaseObject
hasProperty() | Returns a value indicating whether a property is defined. | yii\base\BaseObject
init() | Initializes the object. | yii\base\BaseObject
off() | Detaches an event handler from a class-level event. | yii\base\Event
offAll() | Detaches all registered class-level event handlers. | yii\base\Event
on() | Attaches an event handler to a class-level event. | yii\base\Event
trigger() | Triggers a class-level event. | yii\base\Event

## Property Details

$isValid public property

Whether to continue rendering the view file. Event handlers of yii\base\View::EVENT_BEFORE_RENDER may set this property to decide whether to continue rendering the current view file.

public boolean $isValid = true
$output public property

The rendering result of yii\base\View::renderFile(). Event handlers may modify this property and the modified output will be returned by yii\base\View::renderFile(). This property is only used by yii\base\View::EVENT_AFTER_RENDER event.

public string $output = null
$params public property

The parameter array passed to the yii\base\View::render() method.

public array $params = null
$viewFile public property

The view file being rendered.

public string $viewFile = null