public partial class Demo_Default : System.Web.UI.Page
{ SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["CloudShopConnectionString1"].ConnectionString);
    
protected void RatingControlChanged(object sender, AjaxControlToolkit.RatingEventArgs e)
{
con.Open();
SqlCommand cmd = new SqlCommand("insert into RatingDetails(Rate)values(@Rating)",con);
cmd.Parameters.AddWithValue("@Rating",Rating1.CurrentRating);
cmd.ExecuteNonQuery();
con.Close();
BindRatingControl();
}
protected void BindRatingControl()
{
    int total = 0;

    DataTable dt = new DataTable();
    con.Open();
    SqlCommand cmd = new SqlCommand("Select Rate from RatingDetails", con);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    da.Fill(dt);
    if (dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            total += Convert.ToInt32(dt.Rows[i][0].ToString());
        }
        int average = total / (dt.Rows.Count);
        Rating1.CurrentRating = average;

        Label1.Text = Convert.ToInt32(total).ToString();
       
        lbltxt.Text = dt.Rows.Count + "user(s) have rated this article";
    }
}
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
            {
                BindRatingControl();
            }
    }