Display database values on asp calendar

Hi, these are the codes i inserted i changed the database path and what to display, but the outcome of it is still nothing. Hope you can help thank you.

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class Planner : System.Web.UI.Page
{
SqlConnection con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|test.mdf;Integrated Security=True;User Instance=True");//for connection
SqlDataAdapter da;
DataSet ds = new DataSet();
protected void Page_Load(object sender, EventArgs e)
{

da = new SqlDataAdapter("select eventName from userPlanner", con);
da.Fill(ds);//we fill dataset ds from all the data of holidays table
}
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
}
protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
for (int i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
if (ds.Tables[0].Rows[i].ItemArray.Contains(e.Day.Date))
{
if (e.Day.Date.DayOfWeek == DayOfWeek.Saturday || e.Day.Date.DayOfWeek == DayOfWeek.Sunday)
{
e.Cell.ToolTip = ds.Tables[0].Rows[i][1].ToString();
}
else
{
e.Cell.ForeColor = Color.White;
e.Cell.BackColor = Color.Red;
e.Cell.ToolTip = ds.Tables[0].Rows[i][1].ToString();//for tooltip
}
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{

}
}

Sorry , but i realize that mine is visual studio 2010 . could it be the problem , if it is any solution for that ?