How to Insert and retrieve video files into database using vb.net?

Dim conn = New MySqlConnection()
       conn.ConnectionString = "server=" & dbServer & ";" _
        & "user id=" & dbUser & ";" _
        & "password=" & dbpassword & ";" _
       & "database="  Dim conn = New MySqlConnection()
        conn.ConnectionString = "server=" & dbServer & ";" _
         & "user id=" & dbUser & ";" _
         & "password=" & dbpassword & ";" _
        & "database=" & dbDb

        Dim myCommand As New MySqlCommand
        myCommand.Connection = conn
        myCommand.CommandText = SQL
        conn.Open()
        myCommand.Parameters.AddWithValue("?fldvideoNo", id)
        myCommand.Parameters.AddWithValue("??fldTopicNo", topNo)
        myCommand.Parameters.AddWithValue("?File", rawdata)
        myCommand.Parameters.AddWithValue("?size", filesize)
        myCommand.ExecuteNonQuery()
        conn.Close()
        conn.Dispose()
        myCommand.Dispose()& dbDb

       Dim myCommand As New MySqlCommand
       myCommand.Connection = conn
       myCommand.CommandText = SQL
       conn.Open()
       myCommand.Parameters.AddWithValue("?fldvideoNo", id)
       myCommand.Parameters.AddWithValue("??fldTopicNo", topNo)
       myCommand.Parameters.AddWithValue("?File", rawdata)
       myCommand.Parameters.AddWithValue("?size", filesize)
       myCommand.ExecuteNonQuery()
       conn.Close()
       conn.Dispose()
       myCommand.Dispose()