C textbox validating event
That means the user cannot close the form unless the field passes validation.
Note also that the user can leave a field if it doesn’t have a This entry was posted in controls and tagged C#, C# programming, controls, example, example program, validate field, validate form, Validating event, Windows Forms programming.
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.
I've posed this kind of question with a explicit validation code but no one responded me. Do not think I havent done enough research before posting this question.
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.
So I'm trying to create a validating event that makes sure a textbox isn't empty and that the number entered doesn't exceed 2000. The way I have it, the validating works if the number exceeds 2000, but not if the textbox is blank. Also new to programming so please explain like you're talking to a 3 year old!
I've posted what I have but every time I run it I get a message that the exception wasn't handled because the "kwh = decimal. Thanks :) You clearly mention yourself what the issue is.