AD 帳號整合 (use C#)

ad.cs

using System;
using System.DirectoryServices;
using System.Diagnostics;

public class AD
{
    private string server;

    public AD(string server)
    {
        this.server = server;
    }

    public bool isAuth(string act, string pwd)
    {
        DirectoryEntry ent = new DirectoryEntry(server, act, pwd);
        DirectorySearcher ds = new DirectorySearcher(ent);

        ds.Filter = "(sAMAccountName=" + act + ")";
        ds.PropertiesToLoad.Add("mail");
        ds.PropertiesToLoad.Add("displayname");

        try
        {
            SearchResult sr = ds.FindOne();
            if (sr == null)
            {
                Trace.WriteLine("No account");
                return false;
            }
            else
            {
                string atest = getVal(sr,"displayname"); 
                string mail = getVal(sr, "mail");
                Trace.WriteLine(string.Format("Hi~ {0}, email: {1}", atest, mail));
                return true;
            }
        }
        catch (Exception e)
        {
            Trace.WriteLine(e.ToString());
            return false;
        }
    }

    private string getVal(SearchResult sr,string key) {
        try {
            return sr.GetDirectoryEntry().Properties[key].Value.ToString();
        }
        catch (Exception) {
            return "";
        }
    }
}

mail.cs

public class ADTests
{
    [TestMethod()]
    public void isAuth()
    {
        AD ad = new AD("LDAP://rusebot.com:389");
        bool res = ad.isAuth("帳號", "密碼");
        Assert.IsTrue(res);
    }
}