套件 | mx.validators |
類別 | public class StringValidator |
繼承 | StringValidator Validator EventDispatcher Object |
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | Flash Player 9, AIR 1.1 |
The <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." />
屬性 | 定義自 | ||
---|---|---|---|
constructor : Object
類別物件的參照或是特定物件實體的建構函數。 | 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 |
方法 | 定義自 | ||
---|---|---|---|
Constructor. | StringValidator | ||
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
會在 EventDispatcher 物件註冊事件偵聽程式,以便讓偵聽程式收到事件的通知。 | EventDispatcher | ||
會將事件傳送到事件流程。 | EventDispatcher | ||
會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。 | EventDispatcher | ||
指出物件是否有已定義的指定屬性。 | Object | ||
Called automatically by the MXML compiler when the Validator
is created using an MXML tag. | Validator | ||
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。 | Object | ||
指出指定的屬性是否存在,以及是否可列舉。 | Object | ||
會從 EventDispatcher 物件移除偵聽程式。 | EventDispatcher | ||
為迴圈作業設定動態屬性的可用性。 | Object | ||
傳回代表此物件的字串,根據地區特定慣例進行格式化。 | Object | ||
會傳回指定之物件的字串形式。 | Object | ||
Performs validation and optionally notifies
the listeners of the result. | Validator | ||
[靜態]
Invokes all the validators in the validators Array. | Validator | ||
[靜態]
Convenience method for calling a validator. | StringValidator | ||
會傳回指定之物件的基本值。 | Object | ||
檢查此 EventDispatcher 物件是否已註冊事件偵聽程式,或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。 | EventDispatcher |
方法 | 定義自 | ||
---|---|---|---|
Sets up all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | ||
[覆寫]
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 |
maxLength | 屬性 |
minLength | 屬性 |
tooLongError | 屬性 |
tooLongError:String
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | Flash Player 9, AIR 1.1 |
Error message when the String is longer
than the maxLength
property.
預設值為 "This string is longer than the maximum allowed length. This must be less than {0} characters long."。
實作
public function get tooLongError():String
public function set tooLongError(value:String):void
tooShortError | 屬性 |
tooShortError:String
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | Flash Player 9, AIR 1.1 |
Error message when the string is shorter
than the minLength
property.
預設值為 "This string is shorter than the minimum allowed length. This must be at least {0} characters long."。
實作
public function get tooShortError():String
public function set tooShortError(value:String):void
StringValidator | () | 建構函式 |
public function StringValidator()
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | Flash Player 9, AIR 1.1 |
Constructor.
doValidation | () | 方法 |
override protected function doValidation(value:Object):Array
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | 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.
參數
value:Object — Object to validate.
|
Array — An Array of ValidationResult objects, with one ValidationResult
object for each field examined by the validator.
|
validateString | () | 方法 |
public static function validateString(validator:StringValidator, value:Object, baseField:String = null):Array
語言版本: | ActionScript 3.0 |
產品版本: | Flex 3 |
執行階段版本: | Flash Player 9, AIR 1.1 |
Convenience method for calling a validator. Each of the standard Flex validators has a similar convenience method.
參數
validator:StringValidator — The StringValidator instance.
| |
value:Object — A field to validate.
| |
baseField:String (default = null ) — Text representation of the subfield
specified in the 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.
|
相關 API 元素
<?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>
Tue Jun 12 2018, 03:47 PM Z