DataGridView.OnCellValueNeeded(DataGridViewCellValueEventArgs) Method


Raises the CellValueNeeded event.

 virtual void OnCellValueNeeded(System::Windows::Forms::DataGridViewCellValueEventArgs ^ e);
protected virtual void OnCellValueNeeded (System.Windows.Forms.DataGridViewCellValueEventArgs e);
abstract member OnCellValueNeeded : System.Windows.Forms.DataGridViewCellValueEventArgs -> unit
override this.OnCellValueNeeded : System.Windows.Forms.DataGridViewCellValueEventArgs -> unit
Protected Overridable Sub OnCellValueNeeded (e As DataGridViewCellValueEventArgs)



The value of the ColumnIndex property of e is less than zero or greater than the number of columns in the control minus one.


The value of the RowIndex property of e is less than zero or greater than the number of rows in the control minus one.


Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnCellValueNeeded 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 OnCellValueNeeded(DataGridViewCellValueEventArgs) in a derived class, be sure to call the base class's OnCellValueNeeded(DataGridViewCellValueEventArgs) method so that registered delegates receive the event.

Applies to

See also