Boolean value toggle: label Visible (C#)
<%@ Page Language="C#" Debug="true" %> <script runat="server"> void Page_Load() { if (Page.IsPostBack) lblOut.Visible = !lblOut.Visible; } </script> <html> <head> </head> <body> <form runat="server"> Click Submit several times <asp:Button id="Button1" runat="server" Text="Submit"></asp:Button> <asp:Label id="lblOut" runat="server" text="See Me"></asp:Label> </form> </body> </html>