MaskedTextBox.OnValidating(CancelEventArgs) Method
Definition
Important
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Raises the Validating event.
protected:
override void OnValidating(System::ComponentModel::CancelEventArgs ^ e);protected override void OnValidating (System.ComponentModel.CancelEventArgs e);override this.OnValidating : System.ComponentModel.CancelEventArgs -> unitProtected Overrides Sub OnValidating (e As CancelEventArgs)Parameters
A CancelEventArgs that contains event data.
Exceptions
A critical exception occurred during the parsing of the input string.
Remarks
The OnValidating method causes the input string to be validated against the ValidatingType property, if a Type has been specified for this property. It will then also raise the TypeValidationCompleted event.
Note
To ensure consistency with text-based controls, validation will occur even if the MaskedTextBox is read-only (its ReadOnly property is set to true).
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnValidating method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors
When overriding OnValidating(CancelEventArgs) in a derived class, be sure to call the base class's OnValidating(CancelEventArgs) method so that registered delegates receive the event.
