login security for asp.net

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In my application i have 25-30 pages
n after login the page can be access.
but i want when user type the url of any inside page, he should be redirect to login page if he is not logged in
is there anyway i can achive this
or i have to check the condition in each n every page_load event of all page

plz reply asap.
also if session is expired or its null then redirect to login page.

all this i want to do in single place instead of each form.....

Posted 29-May-12 0:11am

sanchu90

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dharan1990 · Answer 1 · 2012-05-29T00:22:00

Solution 1

For Session expire see this..
Session Timeout Warning and Redirect[^]

make login page as default home page by right clicking the login.aspx

Posted 29-May-12 0:22am

dharan1990

Rahul Rajat Singh · Answer 2 · 2012-05-29T00:52:00

Solution 2

I think you can do this by using membership and roles of ASP.NET. Putting a check on each page load is rather not recommended instead have a web.config to do the same. read this to get more:

Understanding ASP.NET Roles and Membership - A Beginner's Tutorial[^]

Posted 29-May-12 0:52am

Rahul Rajat Singh

MugiwaraUK · Answer 3 · 2012-05-29T01:36:00

There are two other methods

1. Use a master page, and place the code within the page load there.
2. You can add a Global.asax class and handle the Session Start/End there.

You should be able to redirect the user to the login page on session start and end.

EDIT:
Here is the code for the Global.asax to check as requested

VB:

VB

Private Sub Global_asax_AcquireRequestState(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.AcquireRequestState
       If HttpContext.Current.Session Is Nothing Then
           Return
       End If

       Dim requestedUri As System.Uri = HttpContext.Current.Request.Url
       Dim baseUri As New System.Uri(requestedUri.AbsoluteUri.Substring(0, requestedUri.AbsoluteUri.Length() - requestedUri.PathAndQuery.Length))

       '' They are either logged in, or are requesting the login page
       If requestedUri.AbsoluteUri = baseUri.AbsoluteUri & "login.aspx" OrElse HttpContext.Current.Session("UserLoggedInAttribute") = True Then
           Return
       End If


       HttpContext.Current.Response.Redirect("login.aspx", True)

   End Sub

C# - you need to add the handler

C#

private void Global_asax_AcquireRequestState(object sender, System.EventArgs e)
{
	if (HttpContext.Current.Session == null) {
		return;
	}

	System.Uri requestedUri = HttpContext.Current.Request.Url;
	System.Uri baseUri = new System.Uri(requestedUri.AbsoluteUri.Substring(0, requestedUri.AbsoluteUri.Length() - requestedUri.PathAndQuery.Length));

	//' They are either logged in, or are requesting the login page
	if (requestedUri.AbsoluteUri == baseUri.AbsoluteUri + "login.aspx" || HttpContext.Current.Session["UserLoggedInAttribute"] == true) {
		return;
	}
	HttpContext.Current.Response.Redirect("login.aspx", true);

}