Occurs when a row's shortcut menu is needed.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The event occurs only when the DataGridView control DataSource property is set or its VirtualMode property is true. Handling the event is useful when you want to display a shortcut menu determined by a row's current state or the values it contains.
When you handle the event, the shortcut menu that you specify in the handler is shown whenever the user right-clicks a row unless the CellContextMenuStripNeeded overrides the shortcut menu for the specific cell that was clicked.
The event also occurs whenever the value of the DataGridViewRow.ContextMenuStrip property is retrieved, either programmatically or when the user right-clicks a row.
You can use the DataGridViewRowContextMenuStripNeededEventArgs.RowIndex property to determine the state of a row or the values it contains, and use this information to change or modify the DataGridViewRowContextMenuStripNeededEventArgs.ContextMenuStrip property. This property is initialized with the value of the row ContextMenuStrip property, which the event value overrides.
Handle the event when working with large amounts of data to avoid the performance penalties of setting the row ContextMenuStrip value for multiple rows. For more information, see Best Practices for Scaling the Windows Forms DataGridView Control.
For more information about handling events, see Consuming Events.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.