| 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 theformat()method. (An empty argument is allowed.) -
"Invalid format"means either theformatStringproperty is set to empty (""), or there is less than one pattern letter in theformatStringproperty.
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.
Mostra sintassi MXML
Nascondi sintassi MXMLYou 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"
/>
Elementi API correlati
| 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 | ||
| Metodo | Definito da | ||
|---|---|---|---|
Constructor. | DateFormatter | ||
[override]
Generates a date-formatted String from either a date-formatted String or a Date object. | DateFormatter | ||
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
[statico]
Converts a date that is formatted as a String into a Date object. | DateFormatter | ||
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
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 | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
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:
|
| M | Month in year. The format depends on the following criteria:
|
| D | Day in month. While a single-letter pattern string for day is valid,
you typically use a two-letter pattern string.
Examples:
|
| E | Day in week. The format depends on the following criteria:
|
| 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:
|
| S | Second in minute.
Example:
|
| Q | Millisecond in second
Example:
|
| 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:
|
Il valore predefinito è "MM/DD/YYYY".
Implementazione
public function get formatString():String public function set formatString(value:String):voidDateFormatter | () | Funzione di costruzione |
public function DateFormatter()| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor.
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".
|
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.
|
Date — Date object.
|
Elementi API correlati
<?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>
Tue Jun 12 2018, 02:44 PM Z