Packagemx.validators
Classpublic class DateValidator
InheritanceDateValidator Inheritance Validator Inheritance EventDispatcher Inheritance Object

The DateValidator class validates that a String or Object contains a proper date and matches a specified format. Users can enter a single digit or two digits for month, day, and year. By default, the validator ensures the following formats:

You can specify the date in the DateValidator class in two ways:

MXML Syntaxexpanded Hide MXML Syntax

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

  <mx:DateValidator 
    allowedFormatChars="/\-. " 
    dayListener="Object specified by daySource"
    dayProperty="No default"
    daySource="No default"
    formatError= "Configuration error: Incorrect formatting string." 
    inputFormat="MM/DD/YYYY" 
    invalidCharError="Invalid characters in your date." 
    monthListener="Object specified by monthSource"
    monthProperty="No default"
    monthSource="No default"
    validateAsString="true|false"
    wrongDayError="Please enter a valid day for the month." 
    wrongLengthError="Please type the date in the format inputFormat." 
    wrongMonthError="Please enter a month between 1 and 12." 
    wrongYearError="Please enter a year between 0 and 9999." 
    yearListener="Object specified by yearSource"
    yearProperty="No default"
    yearSource="No default"
  />

View the examples.


Public Properties
 PropertyDefined by
  allowedFormatChars : String
The set of formatting characters allowed for separating the month, day, and year values.
DateValidator
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  dayListener : IValidatorListener
The component that listens for the validation result for the day subfield.
DateValidator
  dayProperty : String
Name of the day property to validate.
DateValidator
  daySource : Object
Object that contains the value of the day field.
DateValidator
 Inheritedenabled : Boolean
Setting this value to false will stop the validator from performing validation.
Validator
  formatError : String
Error message when the inputFormat property is not in the correct format.
DateValidator
  inputFormat : String
The date format to validate the value against.
DateValidator
  invalidCharError : String
Error message when there are invalid characters in the date.
DateValidator
 Inheritedlistener : Object
Specifies the validation listener.
Validator
  monthListener : IValidatorListener
The component that listens for the validation result for the month subfield.
DateValidator
  monthProperty : String
Name of the month property to validate.
DateValidator
  monthSource : Object
Object that contains the value of the month field.
DateValidator
 Inheritedproperty : String
A String specifying the name of the property of the source object that contains the value to validate.
Validator
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 Inheritedrequired : Boolean
If true, specifies that a missing or empty value causes a validation error.
Validator
 InheritedrequiredFieldError : String
Error message when a value is missing and the required property is true.
Validator
 Inheritedsource : Object
Specifies the object containing the property to validate.
Validator
 Inheritedtrigger : IEventDispatcher
Specifies the component generating the event that triggers the validator.
Validator
 InheritedtriggerEvent : String
Specifies the event that triggers the validation.
Validator
  validateAsString : Boolean
Determines how to validate the value.
DateValidator
  wrongDayError : String
Error message when the day is invalid.
DateValidator
  wrongLengthError : String
Error message when the length of the date doesn't match that of the inputFormat property.
DateValidator
  wrongMonthError : String
Error message when the month is invalid.
DateValidator
  wrongYearError : String
Error message when the year is invalid.
DateValidator
  yearListener : IValidatorListener
The component that listens for the validation result for the year subfield.
DateValidator
  yearProperty : String
Name of the year property to validate.
DateValidator
  yearSource : Object
Object that contains the value of the year field.
DateValidator
Protected Properties
 PropertyDefined by
 InheritedactualListeners : Array
Contains an Array of listener objects, if any, or the source object.
Validator
 InheritedactualTrigger : IEventDispatcher
Contains the trigger object, if any, or the source object.
Validator
 InheritedsubFields : Array
An Array of Strings containing the names for the properties contained in the value Object passed to the validate() method.
Validator
Public Methods
 MethodDefined by
  
DateValidator()
Constructor.
DateValidator
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
dispatchEvent(event:Event):Boolean
Dispatches an event into the event flow.
EventDispatcher
 Inherited
hasEventListener(type:String):Boolean
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
hasOwnProperty(name:String):Boolean
Indicates whether an object has a specified property defined.
Object
 Inherited
initialized(document:Object, id:String):void
Called automatically by the MXML compiler when the Validator is created using an MXML tag.
Validator
 Inherited
isPrototypeOf(theClass:Object):Boolean
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
propertyIsEnumerable(name:String):Boolean
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
toString():String
Returns the string representation of the specified object.
Object
 Inherited
validate(value:Object = null, suppressEvents:Boolean = false):ValidationResultEvent
Performs validation and optionally notifies the listeners of the result.
Validator
 Inherited
validateAll(validators:Array):Array
[static] Invokes all the validators in the validators Array.
Validator
  
validateDate(validator:DateValidator, value:Object, baseField:String):Array
[static] Convenience method for calling a validator from within a custom validation function.
DateValidator
 Inherited
valueOf():Object
Returns the primitive value of the specified object.
Object
 Inherited
willTrigger(type:String):Boolean
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Protected Methods
 MethodDefined by
 Inherited
addListenerHandler():void
Sets up all of the listeners for the valid and invalid events dispatched from the validator.
Validator
  
doValidation(value:Object):Array
Override of the base class doValidation() method to validate a date.
DateValidator
 Inherited
getValueFromSource():Object
Returns the Object to validate.
Validator
 Inherited
handleResults(errorResults:Array):ValidationResultEvent
Returns a ValidationResultEvent from the Array of error results.
Validator
 Inherited
isRealValue(value:Object):Boolean
Returns true if value is null.
Validator
 Inherited
removeListenerHandler():void
Disconnects all of the listeners for the valid and invalid events dispatched from the validator.
Validator
Events
 EventSummaryDefined by
 Inherited
invalid
Dispatched when validation fails.Validator
 Inherited
valid
Dispatched when validation succeeds.Validator
Protected Constants
 ConstantDefined by
 InheritedDECIMAL_DIGITS : String = "0123456789"
[static] A String containing the decimal digits 0 through 9.
Validator
 InheritedROMAN_LETTERS : String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
[static] A string containing the upper- and lower-case letters of the Roman alphabet ("A" through "Z" and "a" through "z").
Validator
Property detail
allowedFormatCharsproperty
allowedFormatChars:String  [read-write]

The set of formatting characters allowed for separating the month, day, and year values.

The default value is "/\-. ".

Implementation
    public function get allowedFormatChars():String
    public function set allowedFormatChars(value:String):void
dayListenerproperty 
dayListener:IValidatorListener  [read-write]

The component that listens for the validation result for the day subfield. If none is specified, use the value specified for the daySource property.

Implementation
    public function get dayListener():IValidatorListener
    public function set dayListener(value:IValidatorListener):void
dayPropertyproperty 
public var dayProperty:String

Name of the day property to validate. This property is optional, but if you specify the daySource property, you should also set this property.

daySourceproperty 
daySource:Object  [read-write]

Object that contains the value of the day field. If you specify a value for this property, you must also specify a value for the dayProperty property. Do not use this property if you set the source and property properties.

Implementation
    public function get daySource():Object
    public function set daySource(value:Object):void
formatErrorproperty 
public var formatError:String

Error message when the inputFormat property is not in the correct format.

The default value is "Configuration error: Incorrect formatting string.".

inputFormatproperty 
public var inputFormat:String

The date format to validate the value against. "MM" is the month, "DD" is the day, and "YYYY" is the year. This String is case-sensitive.

The default value is "MM/DD/YYYY".

invalidCharErrorproperty 
public var invalidCharError:String

Error message when there are invalid characters in the date.

The default value is "Invalid characters in your date.".

monthListenerproperty 
monthListener:IValidatorListener  [read-write]

The component that listens for the validation result for the month subfield. If none is specified, use the value specified for the monthSource property.

Implementation
    public function get monthListener():IValidatorListener
    public function set monthListener(value:IValidatorListener):void
monthPropertyproperty 
public var monthProperty:String

Name of the month property to validate. This property is optional, but if you specify the monthSource property, you should also set this property.

monthSourceproperty 
monthSource:Object  [read-write]

Object that contains the value of the month field. If you specify a value for this property, you must also specify a value for the monthProperty property. Do not use this property if you set the source and property properties.

Implementation
    public function get monthSource():Object
    public function set monthSource(value:Object):void
validateAsStringproperty 
public var validateAsString:Boolean

Determines how to validate the value. If set to true, the validator evaluates the value as a String, unless the value has a month, day, or year property. If false, the validator evaluates the value as a Date object.

The default value is true.

wrongDayErrorproperty 
public var wrongDayError:String

Error message when the day is invalid.

The default value is "Please enter a valid day for the month.".

wrongLengthErrorproperty 
public var wrongLengthError:String

Error message when the length of the date doesn't match that of the inputFormat property.

The default value is "Please type the date in the format <i>inputFormat</i>.".

wrongMonthErrorproperty 
public var wrongMonthError:String

Error message when the month is invalid.

The default value is "Please enter a month between 1 and 12.".

wrongYearErrorproperty 
public var wrongYearError:String

Error message when the year is invalid.

The default value is "Please enter a year between 0 and 9999.".

yearListenerproperty 
yearListener:IValidatorListener  [read-write]

The component that listens for the validation result for the year subfield. If none is specified, use the value specified for the yearSource property.

Implementation
    public function get yearListener():IValidatorListener
    public function set yearListener(value:IValidatorListener):void
yearPropertyproperty 
public var yearProperty:String

Name of the year property to validate. This property is optional, but if you specify the yearSource property, you should also set this property.

yearSourceproperty 
yearSource:Object  [read-write]

Object that contains the value of the year field. If you specify a value for this property, you must also specify a value for the yearProperty property. Do not use this property if you set the source and property properties.

Implementation
    public function get yearSource():Object
    public function set yearSource(value:Object):void
Constructor detail
DateValidator()constructor
public function DateValidator()

Constructor.

Method detail
doValidation()method
protected override function doValidation(value:Object):Array

Override of the base class doValidation() method to validate a date.

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 — Either a String or an Object to validate.

Returns
Array — An Array of ValidationResult objects, with one ValidationResult object for each field examined by the validator.
validateDate()method 
public static function validateDate(validator:DateValidator, value:Object, baseField:String):Array

Convenience method for calling a validator from within a custom validation function. Each of the standard Flex validators has a similar convenience method.

Parameters
validator:DateValidator — The DateValidator 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.date, the baseField value is "date".

Returns
Array — An Array of ValidationResult objects, with one ValidationResult object for each field examined by the validator.

See also

mx.validators.ValidationResult
Examples
DateValidatorExample
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the DateValidator. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        import mx.controls.Alert;
    </mx:Script>

    <mx:Model id="CheckModel">
        <dateInfo>
            <DOB>{dob.text}</DOB>
        </dateInfo>
    </mx:Model>

    <mx:DateValidator source="{dob}" property="text" allowedFormatChars="/" 
        trigger="{myButton}" triggerEvent="click" 
        valid="Alert.show('Validation Succeeded!');"/>

    <mx:Panel title="DateValidator Example" width="75%" height="75%" 
        paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">

        <mx:Form>
            <mx:FormItem label="Enter date of birth (mm/dd/yyyy): ">
                <mx:TextInput id="dob" width="100%"/>
            </mx:FormItem>

            <mx:FormItem >
                <mx:Button id="myButton" label="Validate" />
            </mx:FormItem>
        </mx:Form>

    </mx:Panel>
</mx:Application>



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Thu Jun 22 2006, 10:21 PM GMT-07:00