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protected void btnConn_Click(object sender, EventArgs e)
    {
        SqlConnection conn = new SqlConnection();
        conn.ConnectionString = "Data Source=PC-200909101507\\SQLEXPRESS;Initial Catalog=Northwind;User ID=sa;Password=123456!";
        conn.Open();
        lblResult.Text = "數據庫連接成功！";
        conn.Close();
        conn.Dispose();
    }