Login Page Problem

I have created a simple login page using loginview
login.aspx

Code:

---

<asp:LoginView ID="LoginView1" runat="server"> 
    <AnonymousTemplate> 
      <asp:Login ID="loginsys" runat="server" UserNameLabelText="Username:" OnAuthenticate="loginsys_Authenticate" /> 
      <asp:Label ID="lblErrMsg" runat="server" ForeColor="Red" /> 
    </AnonymousTemplate> 
    <LoggedInTemplate> 
        Hello,<asp:LoginName ID="LoginName1" runat="server" /> 
        <br /> 
        <asp:LoginStatus ID="LoginStatus1" runat="server" LoginText="" LogoutText="Logout" /> 
    </LoggedInTemplate> 
 </asp:LoginView>

---

login.aspx.vb

Code:

---

Dim loginsys As WebControls.Login = Me.LoginView1.FindControl("loginsys")
    Dim lblErrMsg As Label = Me.LoginView1.FindControl("lblErrMsg")

    Protected Sub loginsys_Authenticate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.AuthenticateEventArgs)
        Try

            If ChkLogin(loginsys.UserName, loginsys.Password) Then
                FormsAuthentication.RedirectFromLoginPage(loginsys.UserName, loginsys.RememberMeSet)
            Else
                Throw New Exception("Login Failed")
            End If
        Catch ex As Exception
            lblErrMsg.Text = ex.Message
        End Try


    End Sub

    Public Function ChkLogin(ByVal UserName As String, ByVal UserPassword As String) As Boolean
        Dim conn As New SqlConnection
        Dim cmmd As New SqlCommand

        Dim pmtUserName As New SqlParameter
        Dim pmtUserPassword As New SqlParameter
        Dim strSQL As String
        Dim dr As SqlDataReader

        Try

            conn = New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)

            conn.Open()
            strSQL = "SELECT * FROM tbl_user WHERE login = @login and pwd = @pwd"
            cmmd.Connection = conn
            cmmd.CommandText = strSQL

            pmtUserName.ParameterName = "@login"
            pmtUserName.Value = UserName
            pmtUserPassword.ParameterName = "@pwd"
            pmtUserPassword.Value = UserPassword

            cmmd.Parameters.Add(pmtUserName)
            cmmd.Parameters.Add(pmtUserPassword)

            dr = cmmd.ExecuteReader()

            If dr.Read Then
                ChkLogin = True
            Else

                Throw New Exception("Login Fails!!")
            End If

        Catch ex As Exception
            ChkLogin = False
            lblErrMsg.Text = ex.Message
        Finally

            pmtUserName = Nothing
            pmtUserPassword = Nothing

            dr = Nothing
            cmmd = Nothing
            conn = Nothing
        End Try

    End Function

---

However, i got the error message once start up the page

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

I have no ideas what kind of error it is since i don't find any problems in the code.

Could anybody advice, please?

Thank you

Do you have output of the stack trace?

Here is the stack trace

[NullReferenceException: Object reference not set to an instance of an object.]
login_login2..ctor() +30
ASP.login_login2_aspx..ctor() +10
__ASP.FastObjectFactory_app_web_62atenog.Create_ASP_login_login2_aspx() +20
System.Web.Compilation.BuildResultCompiledType.CreateInstance() +58
System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp, Boolean noAssert) +113
System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +32
System.Web.UI.PageHandlerFactory.System.Web.IHttpHandlerFactory2.GetHandler(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +62
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +292
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +139
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +146


Hope it helps!

The only thing that comes to mind there is that you can't use a LoginView's controls directly - so lblErrMsg in the catch in loginsys_Authenticate is probably Nothing. Apologies, I'd normally use C# so my VB might be a bit sketchy...

Code:

---

Dim lbl As Label

lbl = LoginView1.FindControl("lblErrMsg")

If Not lbl Is Nothing Then
    lbl.Text = ex.Message
End If

---

HTH,
T

I tried but defining like this will have an error of " Declaration expected"

Thank you