Twice Login

i gr8

If same user logging in twice, Make his 1st attempt to log-out how to handle this. Any help

Abhijit Jana

You can maintain a database for logged in user. While new user logging in check with the DB for the same user are already logged in or not, if yes show him a message that some one has already logged in using same credentials. Thanks !

i gr8

Yes i thought of this. but logging out previous attempt would be better. any idea on that.

Abhijit Jana

You can. But for that each and every time you have to check with the Database or may be Cached data. You can try like that, Suppose below is your logged in table Structure

M_ID M_Name M_Status
101 Abhi 1
102 Raj 1

Now, M_Status ,1 Means these user are logged in. If some other user trying to logged in using same M_ID like 101, you just check your temp DB and and set M_Status=0 and insert a new record as below .

M_ID M_Name M_Status
101 Abhi 0
102 Raj 1
101 Jhon 1

Now, who is already logged in ("Abhi") with the same ID ( 101 ) with M_Status=0 is need to be logged off from application. So, after that table should be like this,

M_ID M_Name M_Status
102 Raj 1
101 Jhon 1

Its means, if any point of time any M_Status=0, corresponding user need to be logged off from application. This is just an idea. You can think on that :)

i gr8

i have used Application State and achieved. Thnks for u r suggestions

Abhijit Jana

If possible please provide some details of implementation, so that it can help some others :)

i gr8

MasterPageLoad

Dim userId As String = Session("UserID")
Dim multipleLogin As New Dictionary(Of String, String)()
multipleLogin = New Dictionary(Of String, String)()
Application.Lock()
multipleLogin = DirectCast(Application("MultipleLogin"), Dictionary(Of String, String))
If (multipleLogin.ContainsKey(userId)) Then
Response.Output.Write("<script>alert(You have already signed in. Loggin out)</script>")
Session.Clear()
Response.Redirect("~/Login.aspx")
End If

    multipleLogin.Add(userId, Session.SessionID)
    Application("MultipleLogin") = multipleLogin
    Application.UnLock()