using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class sites_test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string site_id = HttpContext.Current.Request.Url.Host;
        var conn_config = ConfigurationManager.ConnectionStrings[site_id];

        string title = Sites.sites.FirstOrDefault(q => q.url == site_id)?.title;

        string conn_str = conn_config==null?"(N/A)": conn_config.ConnectionString;
        int n = 40;
        string conn_str_test = "(N/A)";
        if (conn_str.Length>n)
        {
            conn_str_test=conn_str.Substring(0, n) + "......" + conn_str.Right(n);
        }
        Label1.Text = site_id;
        Label4.Text = conn_str_test;        
    }
}
public static class StringExtensions
{
    public static string Right(this string str, int length)
    {
        return str.Substring(str.Length - length, length);
    }
}