ScriptManager.SetFocus Method (String)
Sets the browser focus to the control specified by ID.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
The SetFocus method works like the SetFocus method for the Page class. Both methods make the control with the specified ID the active control on the Web page. The SetFocus method of the ScriptManager class is used to set focus during an asynchronous postback. During postbacks and when the page is first rendered, the SetFocus method calls the SetFocus method of the Page class.
If there are multiple calls to the SetFocus method, the control in the last call receives focus.
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.