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DataGridView::RowHeightInfoNeeded Event

Occurs when information about row height is requested.

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

 event DataGridViewRowHeightInfoNeededEventHandler^ RowHeightInfoNeeded {
	void add (DataGridViewRowHeightInfoNeededEventHandler^ value);
	void remove (DataGridViewRowHeightInfoNeededEventHandler^ value);

This event is useful for preserving custom row heights after a sorting operation. This is necessary because sorting operations are normally handled by the data source, which does not keep track of the correspondence between rows of data and rows in the control. This event occurs only when the DataSource property has been set or when the VirtualMode property is true. In the latter case, you provide your own data store and sorting operations. Handle the RowHeightInfoPushed event to store updated height information when the user changes a row height. Use RowHeightInfoNeeded to retrieve the stored height information when the control needs it.

For more information about handling events, see Consuming Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the RowHeightInfoNeeded event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox::Show with Console::WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type DataGridView named DataGridView1. Then ensure that the event handler is associated with the RowHeightInfoNeeded event.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.