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DataGridView::OnValidating Method (CancelEventArgs^)

.NET Framework (current version)
 

Raises the Validating event.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

C#
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protected:
virtual void OnValidating(
	CancelEventArgs^ e
) override

Parameters

e
Type: System.ComponentModel::CancelEventArgs^

A CancelEventArgs that contains the event data.

Exception Condition
Exception

Validation failed and either there is no handler for the DataError event or the handler has set the DataGridViewDataErrorEventArgs::ThrowException property to true. The exception object can typically be cast to type FormatException.

In addition to raising the Validating event, this method ends the current cell edit and validates the cell and row values.

Raising an event invokes the event handler through a delegate. For more information, see NIB: Raising an Event.

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 in a derived class, be sure to call the base class's OnValidating method so that registered delegates receive the event.

.NET Framework
Available since 2.0
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