C validating cancel button
private void text Box1_Validating(object sender, System. Event Args e) public bool Valid Email Address(string email Address, out string error Message) The biggest problem with validation on Win Forms is the validation is only executed when the control has "lost focus".So the user has to actually click inside a text box then click somewhere else for the validation routine to execute.In my solution, when the user clicks the submit button for a form, I check each control on the form (or whatever container is specified) and use reflection to determine if a validating method is defined for the control. If any of the validations fail, the routine returns a failure and allows the process to stop.This solution works well especially if you have several forms to validate.Not executing server side validation leaves your application code vulnerable to malicious users.Malicious users might circumvent client side validations in an effort to break-in or damage your servers.MSDN doesn't have validated/validating listed in their documentation.However, both properties are listed as events in properties window. Cancel Event Args e) private void text Box1_Validated(object sender, System.
There are good reasons to always execute validation checks on the server.I have a form with one email field, a submit button, and a cancel button.