Actually im creating a encrypted login form ,every thing works fine only having problem is that not able to retrive my salt and hash value for my database table

Private Sub b2_Click(sender As Object, e As EventArgs) Handles b2.Click
        Try
            If t1.Text = Nothing Then
                MsgBox("You must enter the username ", Microsoft.VisualBasic.MsgBoxStyle.Exclamation, "Eror")
            End If
            If t2.Text = Nothing Then
                MsgBox("You must enter the Password ", Microsoft.VisualBasic.MsgBoxStyle.Exclamation, "Eror")
            End If
            Dim rndsalt1 As String
            Dim hashcheck As String
            Dim pwd As String = t2.Text
            DBConnection.Open()
            Dim abc As String = "select Rand_Salt,Hash_Code from pwdTable where UserName Like  ' %" & t1.Text & "';"
            Dim cmd As SqlCommand = New SqlCommand(abc, DBConnection)
            Dim dr As SqlDataReader = cmd.ExecuteReader
            If dr.Read() Then
                rndsalt1 = dr(1).ToString()
                hashcheck = dr(2).ToString()

            End If

            DBConnection.Close()

            Dim passstr As String = pwd + rndsalt1
            Dim bytes = Encoding.UTF8.GetBytes(passstr)
            Dim bpass As Byte()
            Dim hash As HashAlgorithm = New SHA256Managed()
            bpass = hash.ComputeHash(bytes)
            Dim storehash As String = Convert.ToBase64String(bpass)


            If storehash = hashcheck Then
                MessageBox.Show("Login sucessful !!!!")
            Else
                MessageBox.Show("Loged in sucessful ")

            End If
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub
End Class