ดึงค่าจาก ฐานข้อมูลที่เป็น char 1 หรือ 2 แล้ว นำมาเปรียบเทียบว่า ถ้า 1 ให้ไปเพจ Admin ถ้า 2 ให้ไป เพจ User * แต่ดันไปเพจ Admin อย่างเดียวเลย ครับ

Option Explicit On
Option Strict On
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.Configuration

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Login1_Authenticate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.AuthenticateEventArgs) Handles Login1.Authenticate
        Dim username As String
        Dim pwd As String
        '-------------------------------------
        username = Login1.UserName
        pwd = Login1.Password

        '-------------------------------------
        Dim StrConn As String
        StrConn = WebConfigurationManager.ConnectionStrings("Database").ConnectionString
        Dim Conn As New SqlConnection(StrConn)
        Conn.Open()
        '-------------------------------------
        Dim sqlUserName As String
        Dim sqlCheckUser As String

        sqlUserName = " SELECT Username,Password FROM member "  'ตรวจสอบ Username และ Password ว่ามีใน database หรือไม่
        sqlUserName &= " WHERE (Username ='" & username & "') "
        sqlUserName &= " AND (Password ='" & pwd & "' ) "

        sqlCheckUser = " SELECT AccessID FROM member "  'ตรวจสอบ User ว่าเป็น Admin หรือ member ธรรมดา
        sqlCheckUser &= " WHERE (Username ='" & username & "') "
        sqlCheckUser &= " AND (Password ='" & pwd & "' ) "


        Dim com As New SqlCommand(sqlUserName, Conn)
        Dim com2 As New SqlCommand(sqlCheckUser, Conn)
        '-------------------------------------



        Dim CurrentName As String
        Dim CheckUser As Integer



        CurrentName = CStr(com.ExecuteScalar)
        CheckUser = CInt(com2.ExecuteScalar)
        Response.Write(CheckUser)

        If CurrentName <> "" Then

            If CheckUser = 1 Then
                e.Authenticated = True

                Session("UserAuthentication") = username
                Session.Timeout = 1
                Response.Redirect("admin/AdministratorPage.aspx")

            ElseIf CheckUser = 2 Then
                e.Authenticated = True
                Session("UserAuthentication") = username
                Session.Timeout = 1
                Response.Redirect("member/UserPage.aspx")

            End If

        Else
            e.Authenticated = False
            Session("UserAuthentication") = ""
        End If

    End Sub


End Class

<script language="VB"  runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        If Session("UserAuthentication") = "" Then
            Response.Redirect("~/Default.aspx")
        End If
        
    End Sub
</script>