Occurs when the Value of a node belonging to this document is about to be changed.
Assembly: System.Xml (in System.Xml.dll)
This event allows the user to do extra checking and, if necessary, throw an exception to stop the operation. If an exception is thrown the XmlDocument returns to its original state. This event only applies to nodes that have a value.
All nodes created by this document, whether or not they have been inserted into the document, are included in this event.
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