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DataGridView.OnAutoSizeColumnsModeChanged Method

Raises the AutoSizeColumnsModeChanged event.

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

protected virtual void OnAutoSizeColumnsModeChanged (
	DataGridViewAutoSizeColumnsModeEventArgs e
protected void OnAutoSizeColumnsModeChanged (
	DataGridViewAutoSizeColumnsModeEventArgs e
protected function OnAutoSizeColumnsModeChanged (
	e : DataGridViewAutoSizeColumnsModeEventArgs
Not applicable.



A DataGridViewAutoSizeColumnsModeEventArgs that contains the event data.

Exception typeCondition


The value of the PreviousModes property of e is a null reference (Nothing in Visual Basic).


The number of entries in the array returned by the PreviousModes property of e is not equal to the number of columns in the control.

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

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

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0