Gets or sets a string that represents the ID of the control that is a trigger for the UpdatePanel control.
member ControlID : string with get, set
The ControlID property must be set to the ID of a control that implements the INamingContainer, IPostBackDataHandler, or IPostBackEventHandler interface.
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.