Pacchetto | mx.validators |
Classe | public class StringValidator |
Ereditarietà | StringValidator Validator EventDispatcher Object |
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The <mx:StringValidator>
tag
inherits all of the tag attributes of its superclass,
and add the following tag attributes:
<mx:StringValidator maxLength="NaN" minLength="NaN" tooLongError="This string is longer than the maximum allowed length. This must be less than {0} characters long." tooShortError="This string is shorter than the minimum allowed length. This must be at least {0} characters long." />
Proprietà | Definito da | ||
---|---|---|---|
constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | ||
enabled : Boolean
Setting this value to false will stop the validator
from performing validation. | Validator | ||
listener : Object
Specifies the validation listener. | Validator | ||
maxLength : Object
Maximum length for a valid String. | StringValidator | ||
minLength : Object
Minimum length for a valid String. | StringValidator | ||
property : String
A String specifying the name of the property
of the source object that contains
the value to validate. | Validator | ||
required : Boolean = true
If true, specifies that a missing or empty
value causes a validation error. | Validator | ||
requiredFieldError : String
Error message when a value is missing and the
required property is true. | Validator | ||
source : Object
Specifies the object containing the property to validate. | Validator | ||
tooLongError : String
Error message when the String is longer
than the maxLength property. | StringValidator | ||
tooShortError : String
Error message when the string is shorter
than the minLength property. | StringValidator | ||
trigger : IEventDispatcher
Specifies the component generating the event that triggers the validator. | Validator | ||
triggerEvent : String
Specifies the event that triggers the validation. | Validator |
Metodo | Definito da | ||
---|---|---|---|
Constructor. | StringValidator | ||
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento. | EventDispatcher | ||
Invia un evento nel flusso di eventi. | EventDispatcher | ||
Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento. | EventDispatcher | ||
Indica se per un oggetto è definita una proprietà specifica. | Object | ||
Called automatically by the MXML compiler when the Validator
is created using an MXML tag. | Validator | ||
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | ||
Indica se la proprietà specificata esiste ed è enumerabile. | Object | ||
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | ||
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | ||
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | ||
Restituisce la rappresentazione in formato stringa dell'oggetto specificato. | Object | ||
Performs validation and optionally notifies
the listeners of the result. | Validator | ||
[statico]
Invokes all the validators in the validators Array. | Validator | ||
[statico]
Convenience method for calling a validator. | StringValidator | ||
Restituisce il valore di base dell'oggetto specificato. | Object | ||
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher |
Metodo | Definito da | ||
---|---|---|---|
Sets up all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | ||
[override]
Override of the base class doValidation() method
to validate a String. | StringValidator | ||
Returns the Object to validate. | Validator | ||
Returns a ValidationResultEvent from the Array of error results. | Validator | ||
Returns true if value is not null. | Validator | ||
Disconnects all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | ||
This method is called when a Validator is constructed,
and again whenever the ResourceManager dispatches
a "change" Event to indicate
that the localized resources have changed in some way. | Validator |
maxLength | proprietà |
maxLength:Object
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Maximum length for a valid String. A value of NaN means this property is ignored.
Il valore predefinito è NaN.
Implementazione
public function get maxLength():Object
public function set maxLength(value:Object):void
minLength | proprietà |
minLength:Object
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Minimum length for a valid String. A value of NaN means this property is ignored.
Il valore predefinito è NaN.
Implementazione
public function get minLength():Object
public function set minLength(value:Object):void
tooLongError | proprietà |
tooLongError:String
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the String is longer
than the maxLength
property.
Il valore predefinito è "This string is longer than the maximum allowed length. This must be less than {0} characters long.".
Implementazione
public function get tooLongError():String
public function set tooLongError(value:String):void
tooShortError | proprietà |
tooShortError:String
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the string is shorter
than the minLength
property.
Il valore predefinito è "This string is shorter than the minimum allowed length. This must be at least {0} characters long.".
Implementazione
public function get tooShortError():String
public function set tooShortError(value:String):void
StringValidator | () | Funzione di costruzione |
public function StringValidator()
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor.
doValidation | () | metodo |
override protected function doValidation(value:Object):Array
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Override of the base class doValidation()
method
to validate a String.
You do not call this method directly; Flex calls it as part of performing a validation. If you create a custom Validator class, you must implement this method.
Parametri
value:Object — Object to validate.
|
Array — An Array of ValidationResult objects, with one ValidationResult
object for each field examined by the validator.
|
validateString | () | metodo |
public static function validateString(validator:StringValidator, value:Object, baseField:String = null):Array
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Convenience method for calling a validator. Each of the standard Flex validators has a similar convenience method.
Parametri
validator:StringValidator — The StringValidator instance.
| |
value:Object — A field to validate.
| |
baseField:String (default = null ) — Text representation of the subfield
specified in the value parameter.
For example, if the value parameter specifies
value.mystring, the baseField value
is "mystring" .
|
Array — An Array of ValidationResult objects, with one
ValidationResult object for each field examined by the validator.
|
Elementi API correlati
<?xml version="1.0" encoding="utf-8"?> <!-- Simple example to demonstrate StringValidator. --> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"> <fx:Script> import mx.controls.Alert; </fx:Script> <fx:Declarations> <mx:StringValidator source="{fname}" property="text" tooShortError="This string is shorter than the minimum allowed length of 4. " tooLongError="This string is longer than the maximum allowed length of 20." minLength="4" maxLength="20" trigger="{myButton}" triggerEvent="click" valid="Alert.show('Validation Succeeded!');" invalid="Alert.show('Validation Failed!');"/> </fx:Declarations> <s:Panel title="StringValidator Example" width="75%" height="75%" horizontalCenter="0" verticalCenter="0"> <mx:Form left="10" right="10" top="10" bottom="10"> <mx:FormItem label="Enter a name between 4 and 20 characters: "> <s:TextInput id="fname" width="100%"/> </mx:FormItem> <mx:FormItem > <s:Button id="myButton" label="Validate" /> </mx:FormItem> </mx:Form> </s:Panel> </s:Application>
Tue Jun 12 2018, 02:44 PM Z