Displaying the error indicator on a Spark FormItem container in Flex Hero

By On August 30, 2010 · Leave a Comment

The following example shows how you can display the error indicator on a Spark FormItem container in Flex Hero by setting the errorString property or using the Flex validators.

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Using the ZipCodeValidator class to validate US or Canadian zip codes (redux)

By On October 2, 2008 · 1 Comment

In a previous example, “Using the ZipCodeValidator class to validate US or Canadian zip codes”, we saw how you could validate US or US/Canadian zip codes using the Flex ZipCodeValidator class.

The following example shows how you can use the new “Canada only” zip code validator domain type to ensure users only enter a [...]

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Validating negative numbers using the NumberValidator in Flex

By On August 31, 2008 · Leave a Comment

The following example shows how you can prevent or allow negative numbers when using the NumberValidator class by setting the Boolean allowNegative property.

Full code after the jump.

 

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Validating integers using the NumberValidator class

By On August 30, 2008 · 13 Comments

The following example shows how you can validate a number as an integer or real (floating point) number by setting the domain property on a NumberValidator instance.

Full code after the jump.

 

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Validating email addresses using the EmailValidator class in Flex

By On August 29, 2008 · 9 Comments

The following example shows you how you can validate email addresses in a Flex application using the EmailValidator class and the validate() and static EmailValidator.validateEmail() methods.

Full code after the jump.

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Validating strings using the StringValidator class

By On March 13, 2008 · Leave a Comment

The following example shows how you can validate strings using the static StringValidator.validateString() method.

Full code after the jump.

 

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Using the ZipCodeValidator class to validate US or Canadian zip codes

By On August 25, 2007 · 5 Comments

The following example shows how you can use the ZipCodeValidator to validate either US or Canadian zip codes (or should that be “postal codes” for our friends from the Great White North?). It turns out that making the ZipCodeValidator “Canadian friendly” is as simple as setting the domain property, and passing a constant value from [...]

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Validating Flex forms using the Validator classes

By On August 13, 2007 · 45 Comments

Another quick post on validating a form using the StringValidator, NumberValidator, ZipCodeValidator and Validator classes. Not sure if this is the best method, but I used the NumberValidator to validate that a ComboBox has a valid selection (the selectedIndex property was equal to or greater than 0), and I used a combination of StringValidator and [...]

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Using the Validators.validateAll() method to validate a form

By On August 2, 2007 · 4 Comments

I recently saw this issue in FlexCoders and filed a bug for the poster. Well, it turns out the bug I filed was a duplicate of an existing bug, and that bug has been fixed (in Flex 3 — codename:Moxie). So, long story longer, here’s how you can use the Validator class’s validateAll() method to [...]

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