info about code....................

public void ConnectDataBaseToInsert(string Query)
   {
       con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\omar\Documents\Visual Studio 2005\WebSites\Project2\App_Data\Database.mdf;Integrated Security=True;User Instance=True");

       cmd.CommandText = Query; //what does this line do?
       cmd.Connection = con; //what does this line do?
       da = new SqlDataAdapter(cmd); //what does this line do?
       con.Open();
       cmd.ExecuteNonQuery();
       con.Close();
   }