| Paket | mx.validators |
| Klass | public class RegExpValidator |
| Arv | RegExpValidator  Validator EventDispatcher Object |
| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | 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.
Visa MXML-syntax
Dölj MXML-syntaxThe <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."
/>
Relaterade API-element
Publika egenskaper
| Egenskap | Definieras med | ||
|---|---|---|---|
 | constructor : Object
En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans. | 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 | |
Skyddade egenskaper
Publika metoder
| Metod | Definieras med | ||
|---|---|---|---|
Constructor
| RegExpValidator | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser. | EventDispatcher | |
|
Skickar en händelse till händelseflödet. | EventDispatcher | |
|
Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse. | EventDispatcher | |
|
Anger om det finns en egenskap angiven för ett objekt. | Object | |
|
Called automatically by the MXML compiler when the Validator
is created using an MXML tag. | Validator | |
|
Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter. | Object | |
|
Anger om den angivna egenskapen finns och är uppräkningsbar. | Object | |
|
Tar bort en avlyssnare från EventDispatcher-objektet. | EventDispatcher | |
|
Anger tillgänglighet för en dynamisk egenskap för slingåtgärder. | Object | |
|
Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner. | Object | |
|
Returnerar det angivna objektets strängbeteckning. | Object | |
|
Performs validation and optionally notifies
the listeners of the result. | Validator | |
| [statisk]
Invokes all the validators in the validators Array. | Validator | |
|
Returnerar det angivna objektets primitiva värde. | Object | |
|
Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen. | EventDispatcher | |
Skyddade metoder
| Metod | Definieras med | ||
|---|---|---|---|
|
Sets up all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | |
[åsidosätt]
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 | |
Skyddade konstanter
Egenskapsdetaljer
expression | egenskap |
flags | egenskap |
noExpressionError | egenskap |
noExpressionError:String| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Error message when there is no regular expression specifed. The default value is "The expression is missing."
Implementering
public function get noExpressionError():String public function set noExpressionError(value:String):voidnoMatchError | egenskap |
noMatchError:String| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | 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."
Implementering
public function get noMatchError():String public function set noMatchError(value:String):voidKonstruktordetaljer
RegExpValidator | () | Konstruktor |
public function RegExpValidator()| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Constructor
Metoddetaljer
doValidation | () | metod |
override protected function doValidation(value:Object):Array| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | 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.
Parametrar
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.
|
Exempel Så här använder du exemplet
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, 01:40 PM Z