How to: Display the Name of the Current User
You can display the name of the current user using the LoginName control. This control displays the user ID of the current logged-in user, whether the user's identity is established with ASP.NET login controls (and implicitly, ASP.NET membership) or with Integrated Windows authentication.
Note
The current user's login name will appear only if the user has been authenticated. If the user has not logged in, the control is not rendered.
To display the current user name
Place a LoginName control on your page using the following syntax:
<asp:LoginName id="LoginName1" runat="server" FormatString ="Welcome, {0}" />