Question

how to show the alertbox first and then log out

if (machineID.Count != 0)
            {

                checkMachineGrpState(machineID);
        else
                {
                    Response.Write("<script>alert('You are being logged out')</script>");

                   GoSignOut();
                }
    }

 private void GoSignout()
    {
        FormsAuthentication.SignOut();
        Session.Abandon();
        Response.Redirect("~/Default.aspx");
    }

here if i dont call the GosignOut function i can see the alert box but the moment i put call the signout it does not show me the alertbox and simply signs out

So i was thinking if there is a way i can see the alertbox first and then when i press OK it should call signout function in my code behind… thanks

Answer 1

use the clientclick of the server side button that calls this logout code, then return true

e.g.

<asp:Button id="button1" runat="server" OnClientClick="javascript:alert('You are being logged out');return true;" />

edit re thought what you want. try this, I have not tested with the use of session.abandon and the Signout (which may force you to the login page)

if (machineID.Count != 0)
            {

                checkMachineGrpState(machineID);
        else
                {
                   GoSignOut();
                  Page.ClientScript.RegisterStartupScript(this.GetType(), "Redirect", "<script>alert('You are being logged out');window.location.href='" + ResolveUrl("~/Default.aspx") + "';</script>");
                }
    }

 private void GoSignout()
    {
        FormsAuthentication.SignOut();
        Session.Abandon();
    }

if you need to allow the redirect to go to a page other than the login page (which is forced due to the SignOut) you can add something like the below to you web.config. I am not 100% sure you want to allow this as it would allow none authenticated users to access the page

<location path="whateverpage.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>