How to get average rating using Ajax Rating Tool - sql

Question

My code
<form id="form1" runat="server">
<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</cc1:ToolkitScriptManager>
<cc1:Rating ID="Rating1" AutoPostBack="true" OnChanged="OnRatingChanged" runat="server"
StarCssClass="Star" WaitingStarCssClass="WaitingStar" EmptyStarCssClass="Star"
FilledStarCssClass="FilledStar">
</cc1:Rating>
<br />
<asp:Label ID="lblRatingStatus" runat="server" Text=""></asp:Label>
</form>
Rating.aspx
public partial class CS : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DataTable dt = this.GetData("SELECT ISNULL(AVG(Rating), 0) AverageRating, COUNT(Rating) RatingCount FROM UserRatings");
Rating1.CurrentRating = Convert.ToInt32(dt.Rows[0]["AverageRating"]);
lblRatingStatus.Text = string.Format("{0} Users have rated. Average Rating {1}", dt.Rows[0]["RatingCount"], dt.Rows[0]["AverageRating"]);
}
}
private DataTable GetData(string query)
{
DataTable dt = new DataTable();
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(query))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
sda.SelectCommand = cmd;
sda.Fill(dt);
}
}
return dt;
}
}
protected void OnRatingChanged(object sender, RatingEventArgs e)
{
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("INSERT INTO UserRatings VALUES(#Rating)"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#Rating", e.Value);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
Response.Redirect(Request.Url.AbsoluteUri);
}
}
I found this code online.It is not working. I can not find any errors but it is not inserting records.In this output screen is shows 0 users have rated, Average Rating 0 even after you rate it.
I am new to Ajax and asp.net.If you can give any suggestions it would be helpful
THANK YOU.