using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using ESRI.ArcGIS.Client;

using ESRI.ArcGIS.Client.Geometry;

using ESRI.ArcGIS.Client.Tasks;

using System.Net;

using System.IO;

namespace ArcGISDemo

{

    //自定义的Feature

    class FeatureItem

    {

        public Geometry Geometry { set; get; }

        public IDictionary<string, object> Attributes { set; get; }

    };

    class Program

    {

        static bool AddFeature(string layerUrl, FeatureItem featureItem)

        {

            string url = layerUrl+"/addFeatures";

            string data = "f=json"; //以json格式返回结果

            ESRI.ArcGIS.Client.Graphic g = new ESRI.ArcGIS.Client.Graphic()

            {

                //Graphic的Attributes在ArcGIS API for WPF 中是只读的

                //如果是可写的，就可以直接使用Graphic的Attributes，而不需要拼接json

                //Attributes = featureItem.Attributes,

                Geometry = featureItem.Geometry

            };

            FeatureSet fs = new FeatureSet();

            fs.Features.Add(g);

            //使用FeatureSet自带的ToJson函数转换，可以帮助转换Feature的Geometry对象

            //ArcGIS的Geometry对象序列化为json字符串时和标准的json不太一样

            string json = fs.ToJson();

            int begin = json.IndexOf("[");

            int end = json.IndexOf("]", begin);

            string featuresJson = json.Substring(begin, end - begin + );

            string features = string.Format("&features={0}", featuresJson);

            data += features;

            //使用fastJson转换Attributes

            //fastJSON.JSON.Instance.Parameters.UseEscapedUnicode = false;

            //string attr = fastJSON.JSON.Instance.ToJSON(featureItem.Attributes);

            string attr = Newtonsoft.Json.JsonConvert.SerializeObject(featureItem.Attributes);

            //int attrPos = data.IndexOf("attributes");

            //将原来空的Attributes替换掉，以自己转换的json字符串实际情况为准

            string para = data.Replace("\"attributes\":{}","\"attributes\":"+attr);

            string res = PostData(url, para);

            //处理返回的结果

            if (res.Contains("error"))

                return false;

            Dictionary<string, List<Dictionary<string, object>>> resDic

                = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, List<Dictionary<string, object>>>>(res);

            if (resDic.ContainsKey("addResults"))

            {

                List<Dictionary<string, object>> addRes = resDic["addResults"];

                foreach (Dictionary<string, object> dic in addRes)

                {

                    if (dic.ContainsKey("success"))

                    {

                        if (dic["success"].ToString().ToLower() == "true")

                            return true;

                        else return false;

                    }

                }

            }

            return false;

        }

        static string PostData(string url, string data)

        {

            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

            request.Method = "POST";

            request.ContentType = "application/x-www-form-urlencoded";

            byte[] bs = Encoding.UTF8.GetBytes(data);

            Stream reqStream = request.GetRequestStream();

            reqStream.Write(bs, , bs.Length);

            reqStream.Close();

            string responseString = null;

            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)

            {

                StreamReader reader = new StreamReader(response.GetResponseStream());

                responseString = reader.ReadToEnd();

                reader.Close();

            }

            return responseString;

        }

        static void Main(string[] args)

        {

            string url = "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Fire/Sheep/FeatureServer/0";

            MapPoint point = new MapPoint(, );

            FeatureItem fi = new FeatureItem();

            fi.Geometry = point;

            fi.Attributes = new Dictionary<string, object>();

            fi.Attributes.Add("description", "测试点");

            bool res = AddFeature(url, fi);

            if (res)

            {

                Console.WriteLine("添加要素成功！");

            }

            else

            {

                Console.WriteLine("添加要素失败！");

            }

            Console.ReadKey();

        }

    }

}