Question

I’m sure this is trivial, but why isn’t the Windows Authentication user printing in my ASP.NET page inline?

Code behind function:

public string GetCurrentUserWindowsLogin()
{
    string windowsLogin = Page.User.Identity.Name;
    int hasDomain = windowsLogin.IndexOf(@"\");
    if (hasDomain > 0)
    {
        windowsLogin = windowsLogin.Remove(0, hasDomain + 1);
    }
    return windowsLogin;
}

Inline code:

<div class="loginDisplay">[ <%#GetCurrentUserWindowsLogin() %> ]</div>

Answer 1

The <%#... %> is used for Binding Expressions like Eval and Bind.

So if you call Page.DataBind() in page_load it should work.

Another way that should work is to use code render blocks which run normal code:

<% GetCurrentUserWindowsLogin() %>

or the <%= %> construct used for small chunks of information:

<%= GetCurrentUserWindowsLogin() %>