DateFormatter

Pacchetto	mx.formatters
Classe	public class DateFormatter
Ereditarietà	DateFormatter Formatter Object
Sottoclassi	ExpiryDateFormat

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.formatters.DateTimeFormatter come alternativa a questa classe.

The DateFormatter class uses a format String to return a formatted date and time String from an input String or a Date object. You can create many variations easily, including international formats.

If an error occurs, an empty String is returned and a String describing the error is saved to the error property. The error property can have one of the following values:

"Invalid value" means a value that is not a Date object or a is not a recognized String representation of a date is passed to the format() method. (An empty argument is allowed.)
"Invalid format" means either the formatString property is set to empty (""), or there is less than one pattern letter in the formatString property.

The parseDateString() method uses the mx.formatters.DateBase class to define the localized string information required to convert a date that is formatted as a String into a Date object.

Sintassi MXML expanded

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You use the <mx:DateFormatter> tag to render date and time Strings from a Date object.

The <mx:DateFormatter> tag inherits all of the tag attributes of its superclass, and adds the following tag attributes:

  <mx:DateFormatter
    formatString="Y|M|D|A|E|H|J|K|L|N|S|Q"
   />

Vedere gli esempi

Elementi API correlati

mx.formatters.DateBase

Proprietà pubbliche

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	Proprietà		Definito da
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		error : String Description saved by the formatter when an error occurs.	Formatter
		formatString : String The mask pattern.	DateFormatter

Proprietà protette

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	Proprietà		Definito da
		resourceManager : IResourceManager [sola lettura] A reference to the object which manages all of the application's localized resources.	Formatter

Metodi pubblici

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	Metodo		Definito da
		DateFormatter() Constructor.	DateFormatter
		format(value:Object):String [override] Generates a date-formatted String from either a date-formatted String or a Date object.	DateFormatter
		hasOwnProperty(name:String):Boolean Indica se per un oggetto è definita una proprietà specifica.	Object
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		parseDateString(str:String):Date [statico] Converts a date that is formatted as a String into a Date object.	DateFormatter
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object

Metodi protetti

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	Metodo		Definito da
		resourcesChanged():void This method is called when a Formatter is constructed, and again whenever the ResourceManager dispatches a "change" Event to indicate that the localized resources have changed in some way.	Formatter

Descrizione delle proprietà

formatString

proprietà

formatString:String

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The mask pattern.

You compose a pattern String using specific uppercase letters, for example: YYYY/MM.

The DateFormatter pattern String can contain other text in addition to pattern letters. To form a valid pattern String, you only need one pattern letter.

The following table describes the valid pattern letters:

Pattern letter	Description
Y	Year. If the number of pattern letters is two, the year is truncated to two digits; otherwise, it appears as four digits. The year can be zero-padded, as the third example shows in the following set of examples: YY = 05 YYYY = 2005 YYYYY = 02005
M	Month in year. The format depends on the following criteria: If the number of pattern letters is one, the format is interpreted as numeric in one or two digits. If the number of pattern letters is two, the format is interpreted as numeric in two digits. If the number of pattern letters is three, the format is interpreted as short text. If the number of pattern letters is four, the format is interpreted as full text. Examples: M = 7 MM= 07 MMM=Jul MMMM= July
D	Day in month. While a single-letter pattern string for day is valid, you typically use a two-letter pattern string. Examples: D=4 DD=04 DD=10
E	Day in week. The format depends on the following criteria: If the number of pattern letters is one, the format is interpreted as numeric in one or two digits. If the number of pattern letters is two, the format is interpreted as numeric in two digits. If the number of pattern letters is three, the format is interpreted as short text. If the number of pattern letters is four, the format is interpreted as full text. Examples: E = 1 EE = 01 EEE = Mon EEEE = Monday
A	am/pm indicator.
J	Hour in day (0-23).
H	Hour in day (1-24).
K	Hour in am/pm (0-11).
L	Hour in am/pm (1-12).
N	Minute in hour. Examples: N = 3 NN = 03
S	Second in minute. Example: SS = 30
Q	Millisecond in second Example: QQ = 78 QQQ = 078
Other text	You can add other text into the pattern string to further format the string. You can use punctuation, numbers, and all lowercase letters. You should avoid uppercase letters because they may be interpreted as pattern letters. Example: EEEE, MMM. D, YYYY at L:NN:QQQ A = Tuesday, Sept. 8, 2005 at 1:26:012 PM

Il valore predefinito è "MM/DD/YYYY".

Implementazione
public function get formatString():String
public function set formatString(value:String):void

Descrizione della funzione di costruzione

()

Funzione di costruzione

public function DateFormatter()

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Constructor.

Descrizione dei metodi

format

()

metodo

override public function format(value:Object):String

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Generates a date-formatted String from either a date-formatted String or a Date object. The formatString property determines the format of the output String. If value cannot be formatted, return an empty String and write a description of the error to the error property.

Parametri

value:Object — Date to format. This can be a Date object, or a date-formatted String such as "Thursday, April 22, 2004".

Restituisce

String — Formatted String. Empty if an error occurs. A description of the error condition is written to the error property.

parseDateString

()

metodo

public static function parseDateString(str:String):Date

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Converts a date that is formatted as a String into a Date object. Month and day names must match the names in mx.formatters.DateBase. The hour value in the String must be between 0 and 23, inclusive. The minutes and seconds value must be between 0 and 59, inclusive. The following example uses this method to create a Date object:

      var myDate:Date = DateFormatter.parseDateString("2009-12-02 23:45:30");

Parametri

str:String — Date that is formatted as a String.

Restituisce

Date — Date object.

Elementi API correlati

mx.formatters.DateBase

Esempi Come utilizzare questo esempio

DateFormatterExample.mxml

<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the DateFormatter. -->
<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;

            private var vResult:ValidationResultEvent;

            // Event handler to validate and format input.
            private function Format():void {
                vResult = dateVal.validate();
                if (vResult.type == ValidationResultEvent.VALID) {
                    formattedDate.text = dateFormatter.format(dob.text);
                } else {
                    formattedDate.text = "";
                }
            }
        ]]>
    </fx:Script>

    <fx:Declarations>
        <mx:DateFormatter id="dateFormatter" formatString="month: MM, day: DD, year: YYYY"/>
        <mx:DateValidator id="dateVal" source="{dob}" property="text" inputFormat="mm/dd/yyyy"/>
    </fx:Declarations>

    <s:Panel title="DateFormatter Example" width="75%" height="75%" horizontalCenter="0" verticalCenter="0">
        <mx:Form left="10" right="10" top="10" bottom="10">
            <mx:FormItem label="Enter date (mm/dd/yyyy):" width="100%">
                <s:TextInput id="dob" text=""/>
            </mx:FormItem>
            <mx:FormItem label="Formatted date: " width="100%">
                <s:TextInput id="formattedDate" text="" editable="false"/>
            </mx:FormItem>
            <mx:FormItem>
                <s:Button label="Validate and Format" click="Format();"/>
            </mx:FormItem>
        </mx:Form>
    </s:Panel>

</s:Application>

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DateFormatter - AS3 Flex

Classi x

formatString

DateFormatter

format

parseDateString