Session gets cleared automatically for first time, Second time it works fine

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ASP.NET

session

Hi All,

I have created a website using asp.net language as vb.

I have a login.aspx page after login it redirects to welcome.aspx.

While first time login, the compiler goes for page_load and it creates a session.

While am clicking submit button, i will verify the session created by me in submit_click event. now, while clicking the submit button the session is cleared. so it does not allow me to login and redirects me again to login page.

Again am giving the same credential and clicked submit button , this time it has the session value, and it allow me to welcome.aspx page.

Clearly, the session was cleared on first time postback. on second time it has the value.

Please find my code below.

'on page_load event
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

If Not IsPostBack Then
   Session("lid") = "123456"
End if

End Sub

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click

If Session("lid") <> Nothing Then
     Response.Redirect("welcome.aspx")
Else
     Response.Redirect("login.aspx")
     Exit Sub
End If

End Sub

Kindly please help me to solve this.

Regards,
Norbert