| Pakket | mx.validators |
| Klasse | public class StringValidator |
| Overerving | StringValidator  Validator EventDispatcher Object |
| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
MXML-syntaxis weergeven
MXML-syntaxis verbergenThe <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."
/>
Openbare eigenschappen
| Eigenschap | Gedefinieerd door | ||
|---|---|---|---|
 | constructor : Object
Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie. | 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 | |
Beschermde eigenschappen
Openbare methoden
| Methode | Gedefinieerd door | ||
|---|---|---|---|
Constructor. | StringValidator | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registreert een gebeurtenislistenerobject bij een object EventDispatcher, zodat de listener een melding van een gebeurtenis ontvangt. | EventDispatcher | |
|
Verzendt een gebeurtenis naar de gebeurtenisstroom. | EventDispatcher | |
|
Controleert of het object EventDispatcher listeners heeft geregistreerd voor een specifiek type gebeurtenis. | EventDispatcher | |
|
Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd. | Object | |
|
Called automatically by the MXML compiler when the Validator
is created using an MXML tag. | Validator | |
|
Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven. | Object | |
|
Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd. | Object | |
|
Verwijdert een listener uit het object EventDispatcher. | EventDispatcher | |
|
Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in. | Object | |
|
Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies. | Object | |
|
Retourneert een tekenreeksrepresentatie van het opgegeven object. | Object | |
|
Performs validation and optionally notifies
the listeners of the result. | Validator | |
| [statisch]
Invokes all the validators in the validators Array. | Validator | |
[statisch]
Convenience method for calling a validator. | StringValidator | ||
|
Retourneert de primitieve waarde van het opgegeven object. | Object | |
|
Controleert of een gebeurtenislistener is geregistreerd bij dit object EventDispatcher of een van de voorouders voor het opgegeven type gebeurtenis. | EventDispatcher | |
Beschermde methoden
| Methode | Gedefinieerd door | ||
|---|---|---|---|
|
Sets up all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | |
[overschrijven]
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 | |
Gebeurtenissen
Beschermde constanten
Eigenschapdetails
maxLength | eigenschap |
maxLength:Object| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Maximum length for a valid String. A value of NaN means this property is ignored.
De standaardwaarde is NaN.
Implementatie
public function get maxLength():Object public function set maxLength(value:Object):voidminLength | eigenschap |
minLength:Object| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Minimum length for a valid String. A value of NaN means this property is ignored.
De standaardwaarde is NaN.
Implementatie
public function get minLength():Object public function set minLength(value:Object):voidtooLongError | eigenschap |
tooLongError:String| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Error message when the String is longer
than the maxLength property.
De standaardwaarde is "This string is longer than the maximum allowed length. This must be less than {0} characters long.".
Implementatie
public function get tooLongError():String public function set tooLongError(value:String):voidtooShortError | eigenschap |
tooShortError:String| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Error message when the string is shorter
than the minLength property.
De standaardwaarde is "This string is shorter than the minimum allowed length. This must be at least {0} characters long.".
Implementatie
public function get tooShortError():String public function set tooShortError(value:String):voidConstructordetails
StringValidator | () | Constructor |
public function StringValidator()| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Constructor.
Methodedetails
doValidation | () | methode |
override protected function doValidation(value:Object):Array| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | 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.
Parameters
value:Object — Object to validate.
|
Array — An Array of ValidationResult objects, with one ValidationResult
object for each field examined by the validator.
|
validateString | () | methode |
public static function validateString(validator:StringValidator, value:Object, baseField:String = null):Array| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 3 |
| Runtimeversies: | Flash Player 9, AIR 1.1 |
Convenience method for calling a validator. Each of the standard Flex validators has a similar convenience method.
Parameters
validator:StringValidator — The StringValidator instance.
| |
value:Object — A field to validate.
| |
baseField:String (default = null)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.
|
Verwante API-elementen
Voorbeelden Hoe dit voorbeeld te gebruiken
StringValidatorExample.mxml
<?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>
Wed Jun 13 2018, 11:42 AM Z