| Pacchetto | mx.validators |
| Classe | public class NumberValidator |
| Ereditarietà | NumberValidator  Validator EventDispatcher Object |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
 | A partire da Flex 4.5, Adobe consiglia di utilizzare la classe spark.validators.NumberValidator come alternativa a questa classe. |
The NumberValidator class ensures that a String represents a valid number. It can ensure that the input falls within a given range (specified by
minValue and maxValue),
is an integer (specified by domain),
is non-negative (specified by allowNegative),
and does not exceed the specified precision.
The validator correctly validates formatted numbers (e.g., "12,345.67")
and you can customize the thousandsSeparator and
decimalSeparator properties for internationalization.
Sintassi MXML
Mostra sintassi MXML
Nascondi sintassi MXMLThe <mx:NumberValidator> tag
inherits all of the tag attributes of its superclass,
and adds the following tag attributes:
<mx:NumberValidator
allowNegative="true|false"
decimalPointCountError="The decimal separator can only occur once."
decimalSeparator="."
domain="real|int"
exceedsMaxError="The number entered is too large."
integerError="The number must be an integer."
invalidCharError="The input contains invalid characters."
invalidFormatCharsError="One of the formatting parameters is invalid."
lowerThanMinError="The amount entered is too small."
maxValue="NaN"
minValue="NaN"
negativeError="The amount may not be negative."
precision="-1"
precisionError="The amount entered has too many digits beyond the decimal point."
separationError="The thousands separator must be followed by three digits."
thousandsSeparator=","
/>
| Proprietà | Definito da | ||
|---|---|---|---|
| allowNegative : Object
Specifies whether negative numbers are permitted. | NumberValidator | ||
 | constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| decimalPointCountError : String
Error message when the decimal separator character occurs more than once. | NumberValidator | ||
| decimalSeparator : String
The character used to separate the whole
from the fractional part of the number. | NumberValidator | ||
| domain : String
Type of number to be validated. | NumberValidator | ||
| enabled : Boolean
Setting this value to false will stop the validator
from performing validation. | Validator | |
| exceedsMaxError : String
Error message when the value exceeds the maxValue property. | NumberValidator | ||
| integerError : String
Error message when the number must be an integer, as defined
by the domain property. | NumberValidator | ||
| invalidCharError : String
Error message when the value contains invalid characters. | NumberValidator | ||
| invalidFormatCharsError : String
Error message when the value contains invalid format characters, which means that
it contains a digit or minus sign (-) as a separator character,
or it contains two or more consecutive separator characters. | NumberValidator | ||
| listener : Object
Specifies the validation listener. | Validator | |
| lowerThanMinError : String
Error message when the value is less than minValue. | NumberValidator | ||
| maxValue : Object
Maximum value for a valid number. | NumberValidator | ||
| minValue : Object
Minimum value for a valid number. | NumberValidator | ||
| negativeError : String
Error message when the value is negative and the
allowNegative property is false. | NumberValidator | ||
| precision : Object
The maximum number of digits allowed to follow the decimal point. | NumberValidator | ||
| precisionError : String
Error message when the value has a precision that exceeds the value defined
by the precision property. | NumberValidator | ||
| 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 | |
| separationError : String
Error message when the thousands separator is in the wrong location. | NumberValidator | ||
| source : Object
Specifies the object containing the property to validate. | Validator | |
| thousandsSeparator : String
The character used to separate thousands
in the whole part of the number. | NumberValidator | ||
| 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. | NumberValidator | ||
| 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
from within a custom validation function. | NumberValidator | ||
|
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 number. | NumberValidator | ||
|
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 | |
allowNegative | proprietà |
allowNegative:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Specifies whether negative numbers are permitted.
Valid values are true or false.
Il valore predefinito è true.
Implementazione
public function get allowNegative():Object public function set allowNegative(value:Object):voiddecimalPointCountError | proprietà |
decimalPointCountError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the decimal separator character occurs more than once.
Il valore predefinito è "The decimal separator can occur only once.".
Implementazione
public function get decimalPointCountError():String public function set decimalPointCountError(value:String):voiddecimalSeparator | proprietà |
decimalSeparator:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
The character used to separate the whole
from the fractional part of the number.
Cannot be a digit and must be distinct from the
thousandsSeparator.
Il valore predefinito è ".".
Implementazione
public function get decimalSeparator():String public function set decimalSeparator(value:String):voiddomain | proprietà |
domain:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Type of number to be validated.
Permitted values are "real" and "int".
In ActionScript, you can use the following constants to set this property:
NumberValidatorDomainType.REAL or
NumberValidatorDomainType.INT.
Il valore predefinito è "real".
Implementazione
public function get domain():String public function set domain(value:String):voidexceedsMaxError | proprietà |
exceedsMaxError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value exceeds the maxValue property.
Il valore predefinito è "The number entered is too large.".
Implementazione
public function get exceedsMaxError():String public function set exceedsMaxError(value:String):voidintegerError | proprietà |
integerError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the number must be an integer, as defined
by the domain property.
Il valore predefinito è "The number must be an integer.".
Implementazione
public function get integerError():String public function set integerError(value:String):voidinvalidCharError | proprietà |
invalidCharError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value contains invalid characters.
Il valore predefinito è The input contains invalid characters.".
Implementazione
public function get invalidCharError():String public function set invalidCharError(value:String):voidinvalidFormatCharsError | proprietà |
invalidFormatCharsError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value contains invalid format characters, which means that it contains a digit or minus sign (-) as a separator character, or it contains two or more consecutive separator characters.
Il valore predefinito è "One of the formatting parameters is invalid.".
Implementazione
public function get invalidFormatCharsError():String public function set invalidFormatCharsError(value:String):voidlowerThanMinError | proprietà |
lowerThanMinError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value is less than minValue.
Il valore predefinito è "The amount entered is too small.".
Implementazione
public function get lowerThanMinError():String public function set lowerThanMinError(value:String):voidmaxValue | proprietà |
maxValue:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Maximum value for a valid number. A value of NaN means there is no maximum.
Il valore predefinito è NaN.
Implementazione
public function get maxValue():Object public function set maxValue(value:Object):voidminValue | proprietà |
minValue:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Minimum value for a valid number. A value of NaN means there is no minimum.
Il valore predefinito è NaN.
Implementazione
public function get minValue():Object public function set minValue(value:Object):voidnegativeError | proprietà |
negativeError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value is negative and the
allowNegative property is false.
Il valore predefinito è "The amount may not be negative.".
Implementazione
public function get negativeError():String public function set negativeError(value:String):voidprecision | proprietà |
precision:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
The maximum number of digits allowed to follow the decimal point.
Can be any nonnegative integer.
Note: Setting to 0 has the same effect
as setting domain to "int".
A value of -1 means it is ignored.
Il valore predefinito è -1.
Implementazione
public function get precision():Object public function set precision(value:Object):voidprecisionError | proprietà |
precisionError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the value has a precision that exceeds the value defined by the precision property.
Il valore predefinito è "The amount entered has too many digits beyond the decimal point.".
Implementazione
public function get precisionError():String public function set precisionError(value:String):voidseparationError | proprietà |
separationError:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Error message when the thousands separator is in the wrong location.
Il valore predefinito è "The thousands separator must be followed by three digits.".
Implementazione
public function get separationError():String public function set separationError(value:String):voidthousandsSeparator | proprietà |
thousandsSeparator:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
The character used to separate thousands
in the whole part of the number.
Cannot be a digit and must be distinct from the
decimalSeparator.
Il valore predefinito è ",".
Implementazione
public function get thousandsSeparator():String public function set thousandsSeparator(value:String):voidNumberValidator | () | Funzione di costruzione |
public function NumberValidator()| 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 number.
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.
|
validateNumber | () | metodo |
public static function validateNumber(validator:NumberValidator, value:Object, baseField:String):Array| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Convenience method for calling a validator from within a custom validation function. Each of the standard Flex validators has a similar convenience method.
Parametri
validator:NumberValidator — The NumberValidator instance.
| |
value:Object — A field to validate.
| |
baseField:String — Text representation of the subfield
specified in the value parameter.
For example, if the value parameter specifies value.number,
the baseField value is "number".
|
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 the NumberValidator. -->
<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:NumberValidator source="{age}" property="text" integerError="Enter Integer value"
minValue="18" maxValue="50" domain="int"
trigger="{myButton}" triggerEvent="click"
valid="Alert.show('Validation Succeeded!');"
invalid="Alert.show('Validation failed!');"/>
</fx:Declarations>
<s:Panel title="NumberValidator Example"
width="75%" height="75%"
horizontalCenter="0" verticalCenter="0">
<mx:Form left="10" right="10" top="10" bottom="10">
<mx:FormItem label="Enter an age between 18 and 50:">
<s:TextInput id="age" 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