C windows form validating event
I'd recommend staying away from reflecting on the internal methods and properties of Framework classes.
This will future proof your code as much as possible and prepare you for any breaking changes down the road to the internals of the Framework.
For example, you might want to have a routine that fires on the form's “Closing” event or a data save method to loop through all the controls on your form and validate them independently to ensure that all controls are valid.
This might be a common scenario in data entry forms where you might create a new record and the user might not touch all the fields on your form (and thus never trigger the “Validating” event of your controls). One, pointed out by Chris Sells (read more), invokes the Control's “Notify Validating” event through Reflection.
Introduction The Highlights of Windows Forms Validation Programmatic Validation vs. NET Genghis Acknowledgements References Call me weird, but one of my favorite films is Amazon Women on the Moon, a 1950s B-Grade science fiction movie parody interspersed with several short comedy sketches in the same style as The Kentucky Fried Movie.
Data Grid View Cell Validating Event Handler Data Grid View Cell Validating Event Args Cell Validated Data Grid View Cell On Cell Validating Data Grid View Class System. Cell Validating Dim header Text As String = _ data Grid View1. Text = "Data Grid View validation demo (disallows empty Company Name)" End Sub Private Sub Form1_Load(By Val sender As System. All Cells Except Header) End Sub Private Sub data Grid View1_Cell Validating(By Val sender As Object, _ By Val e As Data Grid View Cell Validating Event Args) _ Handles data Grid View1. Header Text ' Abort validation if cell is not in the Company Name column. Equals("Company Name") Then Return ' Confirm that the cell is not empty. Karen uses the identification to run a dating check on Jerry and it's this disturbing turn of events that forms the backbone of the comedy.Unfortunately for Jerry, his background check fails and Karen declines the date.
When this event is canceled in virtual mode, the Cell Value Pushed event will not be raised.