Gets or sets the number of levels that are expanded when a TreeView control is displayed for the first time.
Assembly: System.Web (in System.Web.dll)
Use the property to control the rendering of the TreeView control the first time that it is displayed. On subsequent postbacks, the nodes retain their current expanded state.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.