| Pacchetto | mx.validators |
| Classe | public class RegExpValidator |
| Ereditarietà | RegExpValidator  Validator EventDispatcher Object |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
expression property, and additional flags
to control the regular expression pattern matching
using the flags property.
The validation is successful if the validator can find a match of the regular expression in the field to validate. A validation error occurs when the validator finds no match.
The RegExpValidator class dispatches the valid
and invalid events.
For an invalid event, the event object is an instance
of the ValidationResultEvent class, and it contains an Array
of ValidationResult objects.
However, for a valid event, the ValidationResultEvent
object contains an Array of RegExpValidationResult objects.
The RegExpValidationResult class is a child class of the
ValidationResult class, and contains additional properties
used with regular expressions, including the following:
-
matchedIndexAn integer that contains the starting index in the input String of the match. -
matchedStringA String that contains the substring of the input String that matches the regular expression. -
matchedSubStringsAn Array of Strings that contains parenthesized substring matches, if any. If no substring matches are found, this Array is of length 0. Use matchedSubStrings[0] to access the first substring match.
Mostra sintassi MXML
Nascondi sintassi MXMLThe <mx:RegExpValidator> tag
inherits all of the tag attributes of its superclass,
and adds the following tag attributes:
<mx:RegExpValidator
expression="No default"
flags="No default"
noExpressionError="The expression is missing."
noMatchError="The field is invalid."
/>
Elementi API correlati
Proprietà pubbliche
| 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 | |
| expression : String
The regular expression to use for validation. | RegExpValidator | ||
| flags : String
The regular expression flags to use when matching. | RegExpValidator | ||
| listener : Object
Specifies the validation listener. | Validator | |
| noExpressionError : String
Error message when there is no regular expression specifed. | RegExpValidator | ||
| noMatchError : String
Error message when there are no matches to the regular expression. | RegExpValidator | ||
| 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 | |
| trigger : IEventDispatcher
Specifies the component generating the event that triggers the validator. | Validator | |
| triggerEvent : String
Specifies the event that triggers the validation. | Validator | |
Proprietà protette
Metodi pubblici
| Metodo | Definito da | ||
|---|---|---|---|
Constructor
| RegExpValidator | ||
| 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 | |
|
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 | |
Metodi protetti
| 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 regular expression. | RegExpValidator | ||
|
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 | |
Eventi
Costanti protette
Descrizione delle proprietà
expression | proprietà |
flags | proprietà |
noExpressionError | proprietà |
noExpressionError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when there is no regular expression specifed. The default value is "The expression is missing."
Implementazione
public function get noExpressionError():String public function set noExpressionError(value:String):voidnoMatchError | proprietà |
noMatchError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when there are no matches to the regular expression. The default value is "The field is invalid."
Implementazione
public function get noMatchError():String public function set noMatchError(value:String):voidDescrizione della funzione di costruzione
RegExpValidator | () | Funzione di costruzione |
public function RegExpValidator()| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor
Descrizione dei metodi
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 regular expression.
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 — For an invalid result, an Array of ValidationResult objects,
with one ValidationResult object for each field examined by the validator.
|
RegExValidatorExample.mxml
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the RegExpValidator. -->
<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>
<![CDATA[
import mx.events.ValidationResultEvent;
import mx.validators.*;
// Write the results to the
private function handleResult(eventObj:ValidationResultEvent):void {
if (eventObj.type == ValidationResultEvent.VALID) {
// For valid events, the results Array contains
// RegExpValidationResult objects.
var xResult:RegExpValidationResult;
reResults.text = "";
for (var i:uint = 0; i < eventObj.results.length; i++) {
xResult = eventObj.results[i];
reResults.text=reResults.text + xResult.matchedIndex + " " + xResult.matchedString + "\n";
}
} else {
reResults.text = "";
}
}
]]>
</fx:Script>
<fx:Declarations>
<mx:RegExpValidator id="regExpV"
source="{regex_text}" property="text"
flags="g" expression="{regex.text}"
valid="handleResult(event)"
invalid="handleResult(event)"
trigger="{myButton}"
triggerEvent="click"/>
</fx:Declarations>
<s:Panel title="RegExpValidator Example"
width="75%" height="75%"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<s:Label width="100%" text="Instructions:"/>
<s:Label width="100%" text="1. Enter text to search. By default, enter a string containing the letters ABC in sequence followed by any digit."/>
<s:Label width="100%" text="2. Enter the regular expression. By default, enter ABC\d."/>
<s:Label width="100%" text="3. Click the Button control to trigger the validation."/>
<s:Label width="100%" text="4. The results show the index in the text where the matching pattern begins, and the matching pattern. "/>
<mx:Form>
<mx:FormItem label="Enter text:">
<s:TextInput id="regex_text" text="xxxxABC4xxx" width="100%"/>
</mx:FormItem>
<mx:FormItem label="Enter regular expression:">
<s:TextInput id="regex" text="ABC\d" width="100%"/>
</mx:FormItem>
<mx:FormItem label="Results:">
<s:TextInput id="reResults" width="100%"/>
</mx:FormItem>
<mx:FormItem >
<s:Button id="myButton" label="Validate"/>
</mx:FormItem>
</mx:Form>
</s:VGroup>
</s:Panel>
</s:Application>
Tue Jun 12 2018, 02:44 PM Z