Radio buttons are implemented as if they were an array of checkboxes.
To find out which value (if any) has been selected, you need to loop through the array until you find which one has been selected: In the case of a single radio button we have nothing to loop through so just return either it's value, if the radio button is checked, or false.
I tested your first piece of code on a form and it does not work at all.
Tried setting it up on onsubmit on both form and button and no go.
Note: If you are using WPF, I don't think there is a Masked Text Box in the base libraries, however there are extensions available on Nu Get which may provide similar functionality. It gives you a true/false value, but doesn't give any real validation. I added the code to the if statement to better explain. Try Parse as davenewza recommended, but another alternative is to use the Visual Basic Is Numeric function from C#.
(Also, for the telephone number example used in the original question, it may not be sufficient: it'll return false for symbols and whitespace that might be in a typical phone number input.)@Dan Puzey In his example he wrote specifically: if (txt Home Phone.
It is an XML/XHTML/HTML5 template engine able to apply a set of transformations to template files in order to display data and/or text produced by your applications.
When form input is important, it should always be verified using a secure server-side script.
The main goal of Thymeleaf is to provide an elegant and well-formed way of creating templates.
In order to achieve this, it is based on XML tags and attributes that define the execution of predefined logic on the , instead of explicitly writing that logic as code inside the template.
You'll see that the all validation scripts presented on this and subsequent pages adhere to the same basic format.
Most modern browsers now support HTML5 Form Validation making it possible to validate form elements without (or before) any Java Script is triggered.