Gets a value indicating whether the page is being loaded in response to a client postback, or if it is being loaded and accessed for the first time.
[Visual Basic] Public ReadOnly Property IsPostBack As Boolean [C#] public bool IsPostBack {get;} [C++] public: __property bool get_IsPostBack(); [JScript] public function get IsPostBack() : Boolean;
true if the page is being loaded in response to a client postback; otherwise false.