how to display a logout button once the users lpgs in

i have a logout [link button] in master page and i want to show it once the user logs in. I did this way

pro开发者_如何转开发tected void LoginAction_Click(object sender, EventArgse)
    {

    LinkButton btnSignout = (LinkButton)Master.FindControl("btnLogout");
        if (btnSignout != null)
        {
            btnSignout.visible=True;
        }

        Response.Redirect("home.aspx");
    }

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just add LoginStatus in LoggedInTemplate control

 <LoggedInTemplate>
    <asp:LoginStatus ID="LoginStatus1" runat="server" OnLoggedOut="LoginStatus1_LoggedOut"                                             
    LogoutText="Sign Out" CssClass="linkLoginControls" />
 </LoggedInTemplate>

LoggedInTemplate will be visible when the user logged in

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I'm not sure what you are asking for but it sounds like you are wondering how to reference content in the master page?

http://msdn.microsoft.com/en-us/library/xxwa0ff0.aspx

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If you can't use a loginstatus control then you can check on page load if the user is authenticated, and if so have your logout button/hyperlink there set to visible.