Validating numeric input
Notice in the following screen capture, we can see the Required Field Validator error message display on the form. The user does not wait on a server round trip to discover errors.
The Java Script Source: Forms : Validate Numeric Only Simply click inside the window below, use your cursor to highlight the script, and copy [Control] C the script into a new file in your text editor (such as Note Pad) and save [Control S].
Is there a way to configure Zend_Validate_Callback so that it sends only one argument, ie, $value to the callback function?
(Which actually isn't very common.)First, some code to test the validation. (I have a more complete tutorial on Reg Ex here: Regular Expressions in VB.
I created a quick form with a Text Box, a Button, and two labels occupying the same location to report the answer by making one or the other visible. Click If -- Test for numeric characters -- lbl Not Int. Visible = True End Sub Private Sub Test String In_Text Changed( By Val sender As System.
Place four controls from the Web forms section of the Toolbox onto the form. If Is Valid returns a value of true then all of the validation checks were successful.
When accepting input from an HTML form, you can't assume that the user will provide the right type of data--you have to validate.
For instance, if your application expects users to type a number, but they type something that can't be interpreted as a number, your code could crash.
Use the Is Numeric() function to determine whether a value can be safely converted into a number.
The value can be an integer or float, but it has to be numeric. Alternatively you can use Zend_Validate_Callback (2) with is_numeric (3) function, so it will be something like this: $validator = new Zend_Validate_Callback('is_numeric');  Sudheer Satyanarayana Sorry, but Zend_Validate_Int will return false on any float values.
I tried using Zend_Validate_Float and Zend_Validate_Digits, but they don't seem to suit my needs. Greetings Thomas Weidner, I18N Team Leader, Zend Framework Original Message ----- From: "Aleksey Zapparov" Thanks for the quick response, Aleksey.
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Validation occurs when a user clicks any Button control by default, but you can change this behavior by setting the Causes Validation property to false. Whenever the user presses a button on the form, the script executes the validation checks for each validation control on the form.