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;

/// <summary>

/// Summary description for WhoseHandler

/// </summary>

public sealed class WhoseHandler

{

    public static Hashtable objUser = new Hashtable();

    /**

     * Function to check if user is already inn, else will add into the

     * Whose online list

     **/

    public static int WhoseInn(int userId, string strUser)

    {

        int retVal = 0;

        if (!(objUser.Contains(userId)))

        {

            objUser.Add(userId, strUser);

            return retVal;

        }

        else

        {

            retVal = 1;

        }

        return retVal;

    }

    /**

     * List All the users who are online

     **/

    public static void WhoseOnline()

    {

        IDictionaryEnumerator whosOln = objUser.GetEnumerator();

        while (whosOln.MoveNext())

        {

            HttpContext.Current.Response.Write(whosOln.Value + "<br>");

        }

    }

    /**

     * Remove user explicitly from the list

     **/

    public static void RemoveUser(int userId)

    {

        if (objUser.Contains(userId))

        {

            objUser.Remove(userId);

        }

    }

}