using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections;
using Microsoft.Win32;

public partial class DeleteHistory : System.Web.UI.Page 
{
    Hashtable myTab = new Hashtable();

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void btnDelete_Click(object sender, EventArgs e)
    {
        DeleteHistory();
    }

    public void DeleteHistory()
    {
        RegistryKey myReg = Registry.CurrentUser.OpenSubKey("Software\\Microsoft" +
                "\\Internet Explorer\\TypedURLs", true);
        string[] names = myReg.GetValueNames();
        for (int i = 0; i < names.Length; i++)
        {
            myTab.Add(names[i].ToString(), myReg.GetValue(names[i].ToString()));
        }
        ArrayList key = new ArrayList();
        key = HistoryValue(myTab);
        if (key.Count > 0)
        {
            for (int i = 0; i < key.Count; i++)
            {
                myReg.DeleteValue(key[i].ToString());
            }

            string message = "<script>alert('TypedURLs History Deleted');</script>";
            Page.RegisterStartupScript("st", message);
        }
    }

    public ArrayList HistoryValue(Hashtable myTab)
    {
        ArrayList val = new ArrayList();
        foreach (DictionaryEntry de in myTab)
        {
            //if you want to delete the particular website related links,
            //you can mention the web site address here
            if (de.Value.ToString().Contains("http://127.0.0.1:8080/"))
            {
                val.Add(de.Key.ToString());
            }
        }
        return val;
    }
}