20161115-restful-directory.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.DirectoryServices;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Script.Services;

/// <summary>
/// Summary description for RESTfulDirectory
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class RESTfulDirectory : System.Web.Services.WebService {

    public RESTfulDirectory () { 
    }

    [WebMethod]
    [ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
    public void Search(string q) {
        Results results = new Results();
        results.directory = new List<Result>();

        if (q != null && q != "")
        {
          // get the results from the directory
          string search = "the LDAP search query";
          
          DataTable dt = Directory.query(search, "none");

          foreach (DataRow dr in dt.Rows)
          {
            Result result = new Result();
            // populate the property fields
            results.directory.Add(result);
          }
        }
 
        string json = Newtonsoft.Json.JsonConvert.SerializeObject(results, Newtonsoft.Json.Formatting.None, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });

        HttpContext.Current.Response.Write(json);
    }
}

public class Results
{
    public List<Result> directory;
}

public class Result
{
    // properties
}